KR20110115859A - Method and apparatus to fill in deficiency of video content - Google Patents

Abstract

The present invention compensates for a shortage after storing (recording) a broadcast program, which is one of video contents. One method for supplementing a recorded program according to the present invention is a program recorded from a broadcast signal. Acquiring, via a data communication network, a portion or all of the program content completely including the contents of the program; identifying a replenishment section corresponding to the shortage of the recorded program in the acquired program content; And updating the recording information of the recorded program so that the section can be reproduced in sequence with the recorded program.

Description

Method and apparatus for supplementing a video content with an insufficient part

The present invention relates to a method and apparatus for completely configuring video content such as a broadcast program.

As broadcasting channels by terrestrial, cable, satellite broadcasting, etc. are diversified and people's daily lives become busy, users often reserve a recording program to watch and watch it at a desired time, for example, at midnight time. If a situation occurs that requires the user to stop watching while watching TV, he or she may request to record the program being watched and then go out. Such recording is usually performed in the recording time zone (start and end time, or start time and recording time), and the set recording time zone often differs from the actual broadcast time zone of the corresponding program as illustrated in FIG. 1. Do.

As illustrated in FIG. 1, when a desired broadcast program is recorded somewhat off the actual broadcast time zone, the end portion 1b of the desired broadcast program 1a is not recorded so that the user who has set the reserved recording watches the end portion. You won't be able to. In the case of a broadcast program, especially a drama, the end part causes a lot of questions, so when the reservation recording is made as illustrated in FIG.

As digital broadcasting becomes more common, users can schedule recording of desired broadcasting programs through EPG (Electronic Program Guide), which is transmitted along with the broadcasting signal. Since it is frequently changed, a desired program may not be started and terminated correctly at the preset recording time. For example, depending on the time confirmed by the EPG in the morning, when the program is recorded in the evening or night, the actual broadcast time may vary from the time provided by the AM EPG. Therefore, even when the reservation recording is set through the EPG, a desired broadcast program may not be completely recorded as shown in FIG. 1.

According to an aspect of the present invention, it is an object of the present invention to provide a method and apparatus for creating an intact video content or a recorded program by additionally acquiring a shortage of the video content or a recorded broadcast program.

According to another aspect of the present invention, it is another object of the present invention to provide a method and apparatus for automatically checking a shortage of video content or a recorded broadcast program.

The object of the present invention is not limited to the explicit purpose described above, and of course includes achieving the effect that can be derived from the specific and exemplary description of the present invention.

According to an aspect of the present invention, there is provided a method of supplementing a recorded program, the method comprising: acquiring, via a data communication network, a part or all of program content completely including contents of a recorded program from a broadcast signal; Identifying a replenishment section corresponding to a shortage of the recorded program, and updating recording information for the recorded program so that the identified replenishment section can be reproduced in sequence with the recorded program. Is done.

In one embodiment according to the present invention, the supplementary section corresponding to the shortage of the recorded program is compared by comparing the recording time zone recorded in the recording information with the information of the actual broadcast time zone provided in association with the program content. Identifies In the present embodiment, the supplementary section on the program content corresponding to the shortage of the recorded program may be identified to obtain a part of the program content corresponding to the identified supplementary section through the data communication network.

In another embodiment according to the present invention, a matching picture of the same scene is found on the recorded program and the obtained program content, and the forward time to the reverse and the trailing edge to the head of the recorded program of the matching picture. The intervals, and the forward time intervals up to the beginning and the trailing edge of the program content of the matching picture, respectively, and then the recorded program through mutual comparison of the obtained reverse time intervals and mutual comparison of the forward time intervals. Identify the replenishment section corresponding to the shortage of. In addition, in the present embodiment, the matching picture may be found in the intra coded pictures of the recorded program and the acquired program content.

In an embodiment according to the present invention, the method may further include converting an encoding format of the supplementary section of the obtained program content into a format that can be decoded by a decoder for decoding the recorded program.

In one embodiment according to the present invention, when the recording information is updated, section information indicating a section of the recorded program and section information indicating the identified supplementary section of the program content are included in the recording information. Updated to include

In another embodiment according to the present invention, when the recording information is updated, the identified supplementary section of the program content is filled into a corresponding short section of the recorded program, and then constituted as one recorded program, and then configured. The section information is updated to include section information indicating the entire section of the recorded program.

In one embodiment according to the present invention, the program content is obtained by specifying in the data communication network based on program identification information including program provider information and program name recorded in the recording information of the recorded program. The program identification information may include a broadcast date and time zone, and / or broadcast turn information.

In one embodiment according to the present invention, a communication time with each of the sources having the program content is checked, and the program content is obtained from a source requiring the shortest communication time.

According to an aspect of the present invention, an apparatus for receiving and recording a broadcast program includes: a receiver for receiving a broadcast program from a broadcast signal, a decoder for decoding and outputting data of the received broadcast program, and a received broadcast program. It includes a storage unit for storing, a communication unit for exchanging data or information with the outside through a data communication network, and a control unit for performing a control operation for receiving or recording a broadcast program at the request of a user, The controller, after recording the broadcast program received by the receiving unit in the storage unit and recording the recording information of the recorded program, the part or all of the program content including the contents of the recorded program completely Acquired through the communication unit, and obtained from the obtained program content. Identifying the supplementary section corresponding to the shortage of the pre-recorded program, and then updating the recorded information so that the identified supplementary section can be reproduced in sequence with the recorded program.

In one embodiment according to the present invention, the control unit automatically acquires a part or all of the program content, identifies the supplemental section, and updates the recording information after recording the recording information.

In another embodiment according to the present invention, the controller performs acquisition of part or all of the program content, identification of the supplementary section, and update of the recording information when a specific request from a user is requested.

In one embodiment according to the present invention, the recorded program is recorded based on a reserved recording item set by a user.

In another embodiment according to the present invention, the recorded program is recorded directly in response to a recording request of the user.

According to an aspect of the present invention, there is provided a method of supplementing video content, the method comprising: storing first video content and generating record information of the first video content, and a second video including the content of the first video content completely; Acquiring a part or all of content through a data communication network, identifying a replenishment section corresponding to a shortage of the first image content in the acquired second image content, and wherein the identified replenishment section is the first And updating the record information to be reproduced in order with the video content.

In accordance with another aspect of the present invention, an apparatus for processing video content includes a storage unit for storing video content, a decoder for decoding and outputting data of the stored video content, and data or information from outside through a data communication network. And a communication unit for exchanging and a control unit for performing a control operation for storing or decoding the broadcast program according to a user's request, wherein the control unit stores the first image content in the storage unit. After recording the record information about the second video content, a part or all of the second video content including the content of the first video content is acquired through the communication unit, and the second video content is obtained from the obtained second video content. After identifying the replenishment section corresponding to the deficit, the identified replenishment section is displayed together with the first video content. And is configured to update the record information to be reproduced accordingly.

In one embodiment according to the present invention, the first image content may be obtained through a communication network or a memory device directly connected to the device.

At least one embodiment of the present invention described above and the present invention described in detail below, when the user inadvertently set or insufficiently set the recording time, the actual broadcast time and the time guided Even if the discrepancy is somewhat different, the user can acquire the unrecorded portion of the program which is not intended to be recorded later and watch it continuously, and through the video content obtained the second portion of the acquired video content secondarily. By replenishing, the user can watch the complete program contents, thereby improving the viewing satisfaction of the user.

It may also dispel user concerns that a major part of the intended recording program may not be recorded unexpectedly.

FIG. 1 illustrates an example in which there may be a difference between a recorded program section and an actual broadcast time according to a user's scheduled recording setting, and FIG. 2 illustrates a lack of a recorded program according to an embodiment of the present invention. Figure 3 shows an example of a configuration for a digital broadcast receiver implemented by filling and confirming, Figure 3, according to an embodiment of the present invention, by recording a broadcast program and confirming the lack of the recorded program 4 is an example of a flowchart of a filling method, and FIG. 4 illustrates an example of a menu screen provided for reserved recording of a broadcast program according to an embodiment of the present invention, and FIG. 5 is provided as a digital broadcast signal. The structure of a packet carrying audio / video data is illustrated, and FIG. 6 shows a structure of a recorded program file for a recorded broadcast program, constructed according to an embodiment of the present invention. 7A and 7B are diagrams for explaining a process of identifying a shortage of a recorded program by comparing a recording time zone with an actual broadcast time zone according to an embodiment of the present invention, and FIGS. 8A and 8B. 9 illustrates an example of a structure of a recorded program file supplemented with a shortage of a recorded program according to an embodiment of the present invention, and FIG. 9 illustrates a shortage of a recorded program according to another embodiment of the present invention. 10A and 10B illustrate a process of identifying a shortage of a recorded program according to the embodiment of FIG. 9. FIG. 10A and 10B illustrate a process of comparing a time distance between a head and a tail of a reference picture to confirm. Drawing.

An embodiment of a method and apparatus for identifying a lack of video content and filling the identified lack to complete the complete video content will be described in detail with reference to the accompanying drawings.

2 is a diagram illustrating a configuration of a digital broadcast receiver in which a method for identifying and filling a shortage of a recorded program, which is one of video contents, is implemented according to an embodiment of the present invention.

The digital broadcast receiver of FIG. 2 includes a signal demodulation unit 9 for tuning a desired signal band in a broadcast signal, for example, a terrestrial wave, a cable, or a satellite broadcast signal, demodulating the signal of the tuned band, and outputting it as a digital stream; A transport stream (SPTS: Single Program TS) belonging to a single program selected from a transport stream (MPTS: Multi-Program TS) of the multiplexed program in the demodulated digital stream and management information (for example, PSI) is selected. A demultiplexer 10 for selective output and a parser for dividing the transport packets of the transport stream of the output single program into video, audio, and PSI data (for example, PES packets). Paser 11, a hard disk 13 for storing data such as a broadcast program, and a PES packet which are output through the parser 11 A buffer memory 12 which stores city; A decoder 15 which decodes the data stored in the buffer memory 12 and restores and outputs the original video and audio signal, and is connected to a network by wire or wirelessly and transmits / receives data to and from a designated remote place through the network. The data communication unit 16 performing a protocol that can be received, the main memory 17 where data is temporarily stored for operations such as program recording and shortage filling, and generating image signals for characters, symbols, or graphic symbols. A screen signal generator 18, a mixer 19 for synthesizing and outputting video signals, and data stored in the buffer memory 12 or recorded in the hard disk 13 according to a user's request. And a control unit 20 for controlling the decoding operation of the decoder 15 and also the operation of each constituent means. The configuration illustrated in FIG. 2 may be integrated with a TV or may be configured in the form of a device added to a computer or a notebook.

The control unit 20 receives a request from a user through a conventional user interface, for example, a keypad, a remote controller, and the like, and if necessary, controls the screen signal generator 18 to guide a response according to the request. Will output The video signal is visually represented by an electronic device having a normal screen output function, for example, a TV, a monitor, or the like.

Hereinafter, embodiments of the present invention will be described in detail with reference to the digital broadcast receiver of FIG. 2 as an example, but the principle of the present invention is not limited to the name of the device, and any device having a function of processing image content or the same. Applicable to all devices with software that performs the function.

3 is an example of a flowchart of a method of recording a broadcast program and identifying and filling out a shortage of the recorded program according to an embodiment of the present invention. Hereinafter, an operation according to an embodiment of the present invention performed by the apparatus of FIG. 2 will be described in detail in parallel with the flowchart illustrated in FIG. 3.

In a digital broadcast receiver having a configuration as illustrated in FIG. 2, when a user designates recording of a desired broadcast program through a normal input means, information related thereto (channel or transponder number, program broadcast time zone, etc.) The controller 20 is stored in the non-volitile system memory 20a in the control unit 20 (S31). The user can select the broadcast program to be recorded by channel, time (start and end time, or start and recording time) and recording mode through the input screen as illustrated in FIG. It may also be a selection in the EPG table provided in a form appropriate to the user via the generator 18. When the selection is made on the EPG table, the control unit 20 checks the channel (and sub-channel) of the selected program item, the broadcast start and end time from the EPG table, and " reserved recording item " in the system memory 20a. Will be saved. Information for constructing the EPG table is obtained from program specific information (PAT, PMT, NIT, etc.) obtained from a current or previous tuning channel and stored in the buffer memory 12.

In the state where the scheduled recording item is set, regardless of whether power is currently applied or standby mode for power saving, the control unit 20 controls the current date and time of the RTC (Real-Time Clock) 20b (hereinafter, The date and time are collectively referred to as “time.” A continuously checks whether or not the start time of the reserved recording item on the system memory 20a is continued (S32). If the current time confirmed from the RTC 20b is a preliminary time of the start time of the preset scheduled recording item, for example, one minute before, the controller 20 performs a preliminary operation necessary for recording. In the current operation mode, only the switching to the designated recording channel is performed. In the standby mode, operation power is applied to each component, and the broadcast signal corresponding to the channel (and subchannel) designated in the reserved recording item is tuned.

In response to the channel switching or tuning command, the signal demodulation unit 9 demodulates and outputs an RF signal corresponding to a designated channel (or a repeater) into a digital stream, and the demultiplexer 10 receives a received signal within a digital stream. Selectively outputs a transport stream carrying video, audio and / or data belonging to one program (corresponding to a designated subchannel if there are a plurality of programs). Evidence information for the demultiplexer 10 to selectively output only a transport stream corresponding to one program in a digital stream is obtained in a corresponding tuning channel before the output of the transport stream and the buffer memory 12 may be obtained. IDs, or PIDs, of transport packets (hereinafter, abbreviated as "TP") that are identified from program specific information (PAT, PMT, etc.) stored in the. More specifically, the demultiplexer (PM) is obtained by obtaining PMT information from the PID of the PMT identified from the PAT included in the transmission packets with PID = 0 and identifying the PIDs of the transmission packets for each type of video and audio obtained from the PMT. 10) outputs only the transmission packets having the identified PID. Of course, the value of the PID of the transmission packet to be sorted and output is set in the demultiplexer 10 by the controller 20 confirming the PSI.

The parser 11 removes the header of each transport packet and collects only payload data and forms a packetized elementary stream (PES) packet on the buffer memory 12 as shown in FIG. 5. (51), the header information of the configured PES packet is referred to, and classified into attributes (for example, video, audio, or data) on the buffer memory 12. The attribute of the PES packet can be known by the value recorded in the stream ID 52 of the PES packet header. PES packets classified and stored in the buffer memory 12 are moved and stored in the hard disk 13 as data of a recorded program under the control of the control unit 20. In this manner, the broadcast program of the designated reserved recording item is recorded (S33). That is, data expected to belong to the reserved recording item is recorded in the hard disk 13. At this time, the PES packets of all attributes may be stored in a single file, or the files may be stored separately for packets of video, audio, and other attributes. In the case of storing separately, the same file name is commonly used to indicate that each file belongs to one recorded program. Of course, characters for identifying attributes, such as v (video), a (audio), and t (text), are appended in the form of "_ (the corresponding character)" after the common file name.

In another embodiment according to the present invention, a reserved recording program can be recorded by directly recording the transport stream output from the demultiplexer 10 into the hard disk 13 without being classified into PES packets. In the above embodiment, when the recorded program is played back, data of a file corresponding to the recorded program read from the hard disk 13 is applied to the decoder 15. Data read from the disk 13 is applied to the parser 11.

During the recording process as described above, the controller 20 continuously checks whether the current time of the RTC 20b is the end time of the reserved recording item (S34), and if it is not the end time, continues recording and ends the end time. End recording. When the recording is finished, the control unit 20, for the recorded program, the time zone (date and time at which the start and end can be known), the channel (and sub-channel) at which the program was recorded, the broadcaster corresponding to the channel, and the like. The recording item information including the name of the recording is recorded together with the recorded program or in the file of the recorded program (S35). In addition, when the EPG is provided from the broadcast signal of the recorded channel or repeater, the broadcast program name (including the turn of the program in the case of a regular broadcast) in the recording time period is checked, and the broadcast program name is also recorded in the file. Fig. 6 shows an example of the recording information recorded in the file, that is, the recording program and the recording item information 61, in this manner. When the name of the broadcaster is not provided through the EPG, when the user directly inputs the broadcaster name corresponding to the channel or repeater through the configuration window provided by the controller 20, the set name is set. Can be obtained through environmental information.

After the above-described recording operation and the end of the recording, the configuration of the recording item information as shown in FIG. 6 may also be performed after the recording by the user's "immediate recording" request, rather than executing the scheduled recording. For example, in the case of instant recording, the above-described process of filling a shortage in the recorded program may be performed by unrecording a part of a program that has already been broadcast before recording starts. In case of “Instant Recording”, the recording may be terminated by the specified time (for example, 30 minutes, 1 hour, etc.) or by the user's stop recording command regardless of the recording end time. In some cases, this may not be recorded properly.

After recording the recording item information, the control unit 20 checks the completeness of the recorded program (S36). The completeness check of the recording program is performed by the user's request for “completeness check / supplement” or, if the “recording completeness check / supplement” mode is set to 'automatic', the “Performance Delay” set together with the designated mode is specified. The inspection is performed after the end of recording. The execution delay time may be set for a time required for a broadcaster or the like to access the server or the like online after the program is broadcasted. The parameters of the “Recording Integrity Check / Supplement” mode described above, such as “Auto / Manual”, “Universal Resource Locator (URL) of a server or site that can access sources to verify / replenish by channel or broadcaster”, "Performance delay time" or the like is preset by the user through the appropriate user menu provided by the controller 20 and set in the system memory 20a.

In order to confirm the completeness of the recorded program, the control unit 20 firstly performs a "recording integrity check / supplement" mode corresponding to the recording channel information or broadcaster information in the recording item information 61 stored as shown in FIG. Obtains access information such as the URL set in. While providing the obtained access information to the data communication unit 16, a remote response, for example, a "VOD web service page" is requested. Such a request is made to a server such as a broadcaster that broadcasts the program, a service provider that receives the program and provides an IPTV service according to the access information preset by the user. On the other hand, the control unit 20 may additionally activate an appropriate protocol for the exchange and analysis of information from the access information with the remote site.

When the controller 20 receives the response information according to the request, for example, the response web page, the controller 20 analyzes the information in the response web page, and has a program information item having the same name as the program name in the recording item information 61. Search for. If the information item is not found, the recording completeness checking process is terminated. If the information item is found, the actual broadcast time zone associated with the information item is checked. At this time, if necessary, the data communication unit 16 may make an additional request and receive the response to check the actual broadcast time zone. When the actual broadcast time zone is confirmed, the controller 20 checks the shortage of the recorded program in comparison with the recording time zone of the recorded program.

When the recording start time recorded in the recording item information is ts and the recording end time is te (hereinafter referred to as “ts: te”), if the actual broadcast time zone of the checked program is t1: t2, The control unit 20 first checks whether the time zone t1: t2 is included in the ts: te time zone. If it is included, there is no shortage, so end the recording completeness check process and mark the status of the recording item as 'complete'. At this time, the screen signal generator 18 may be controlled to output a guide screen indicating that the completeness of the recording item is completed.

If t1 is earlier than ts as shown in FIG. 7A and / or if t2 is later than te as shown in FIG. 7B, it is determined that the recorded program does not record the broadcast program intact (S37). A supplementary process will be performed. In order to perform the replenishment process of the shortage, the control unit 20 is connected in a hyper-text manner to the response information received, for example, the information item of the corresponding program that was previously searched on the response web page. Request transmission of the content of the program by using the source information. In this case, in the case of content in a format capable of partial transmission, it may also request transmission of only a portion capable of obtaining a confirmed shortage. For example, in the case illustrated in FIG. 7A, starting from the beginning of the content, a request for Δt _s-1 (= ts-t1) (including some spare time, of course) is performed. The request for the portion 72 from the time elapsed until the end of the content by? T _e-1 (= te-t1). In the above request, the user's subscription information, for example, a user name and a password, may be provided. Accordingly, the controller 20 may provide the corresponding server with subscription information on the system memory 20a that the user has previously registered with the device for the protocol for subscriber authentication at the time of the content request.

All or part of the program content transmitted from the remote site in response to such a request is received through the data communication unit 16 and temporarily stored in the main memory 17 and / or the hard disk 13 under the control of the control unit 20. It is stored (S38). The control unit 20 checks the compatibility of the temporarily stored program content. That is, it is checked whether the decoder 15 is in a decodable format. If the decoder 15 is not in a format that can be decoded, or if the quality needs to be changed, an audio / video conversion is performed by starting an appropriate codec among the codecs provided in operation S39. . In general, content provided through a communication network is usually lower than the quality of a program provided through a broadcast. Therefore, pixel interpolation, frame addition, etc. may be performed to fit the screen size by the above conversion.

The data of the received / stored program content secured by the above-described process is added by opening and recording the corresponding recorded program file, and the data of the recorded program and the added data can be sequentially reproduced. Information necessary for recording is recorded and the existing recording item information is updated (S41). 8A and 8B show an example of configuration information of a recorded program file in which a shortage of a recorded program is compensated for in this manner, and is made based on the example of FIG. The example of FIG. 8A is for the case where the head part of the recorded program is lacking, and the example of FIG. 8B is for the case where the rear part of the recorded program is lacking. 8A and 8B assume that the entire program content is received and stored, not just the received and stored program content of a portion lacking recording. According to the above assumption, the cell information 811 and 821, which are section information on the supplemented content data included in the updated recording item information 81 and 82, indicates only the insufficient portions 812 and 822 of the recorded program. Of course, when only the insufficient portion is received and stored, the start and end addresses (addrMs and addrMe) of the corresponding cells 811 and 821 will indicate the start and end of the supplementary stored data in the file.

The number of constituent cells of the program increases from 1 to 2 by updating the recording item information of the control unit 20 (813, 823). In the case of FIG. Moves behind cell 811 for data that supplements cell 814. This is to make the playback order progress according to the cell order. Of course, in the case of the completeness test, when the lack of the recorded program is found to be at the front and the rear, that is, ts> t1 and te <t2, the number of cells is recorded as 3, where the first The cell is for the leading supplement of the received program content, the second cell is for the recorded program, and the third cell is for the trailing supplement of the received program content.

According to the above process, when the shortage of the recording program is filled, the controller 20 marks the state of the recording item in the recording item information as 'complete'.

On the other hand, the control unit 20, before updating the recording item information (81, 82), the storage address (addrMs, addrMe) of the supplemental part for the stored program content is calculated as follows, and then the interval is calculated. It records as indicated cell information (S40). It is assumed that the program content for supplementation has been completely received and stored, and for convenience of explanation, it is assumed that only the case where the supplemented part is the rear end of the recorded program will be described. However, even when the head is lacking, the calculation described below can be applied as it is. Since the latter stage is insufficient, the time Δt _e-1 (= te-t1) illustrated in FIG. 7B is determined. Then, the time information for presentation of the head of the supplemental content program temporarily stored in the main memory 17 or the hard disk 13, for example, a PTS (Presentation Time Stamp) or a DTS (Decoding Time Stamp) Check it (remark the confirmed time as TS _s0 ). If necessary, partial decoding, that is, decoding only header information may be interpreted if necessary. The time of TSoff (= TS _s0 + Δt _e-1 ) is calculated. An intra coded I picture having a PTS or DTS closest to the calculated TSoff and not passing its timestamp, or the storage location of the picture group containing the I picture is identified. AddrMs (= addrI + ΔAdd) is a value obtained by adding the address difference (ΔAdd) from the beginning of the stored program content to the start address (addrI) of the supplementary content data recorded on the file at the checked storage location. .

In another embodiment according to the present invention, the shortage of the recorded program is checked by comparing the content of the corresponding program provided in the VOD method with a recorded program. In the present embodiment, since the actual broadcast time zone of the corresponding program is not referred to, the present invention may be applied even when no actual broadcast time zone is provided. First, the controller 20 finds and receives program content corresponding to a recorded program in the same manner as described above, and temporarily stores the content in the hard disk 13. Then, the data corresponding to an arbitrary section of the recording program recorded on the hard disk 13, preferably a part of the middle region, is moved and stored in the main memory 17, and then a specific format is used in the data of the section. It is possible to decode only a picture, e.g., I pictures (at this time, start the appropriate codec or use the decoder 15.) and store it in the main memory 17 sequentially. The video image of the I picture thus stored is compared with the video image of the previous I picture, and the video image of the I picture having a sum of the pixel difference (or absolute value of the difference) is the largest or more than a predetermined threshold value in the corresponding interval. Find it. This is a process for finding a picture in which a scene change is performed, and the reason for finding a picture in which a scene change has been performed is to reduce the possibility of an error in the picture comparison with the program content to find a matching picture in the program content.

The control unit 20 sets the picture found in the same manner as the reference picture, and then stores data of program content temporarily stored in the hard disk 13 through the decoder 15 through the main memory 17. The difference from the reference picture is obtained while decoding output. Of course, the decoding of the decoder 15 at this time is also performed only for the I picture. That is, faster operation is achieved by not decoding P or B pictures by temporal prediction. An I picture (hereinafter, referred to as a "corresponding picture") whose minimum difference from the reference picture becomes minimum or below an appropriate allowable value is specified.

In the above description, although the reference picture is determined in the recorded program and the corresponding picture is found in the program content, the reverse operation may be performed. That is, the reference picture may be found in the middle section of the program content, and the corresponding picture may be found in the recorded program based on the reference picture.

When the corresponding picture is specified in the program content, the controller 20 abbreviates the presentation-related time information (PTS or DTS: hereinafter “time stamp”) of the corresponding picture 92 as illustrated in FIG. 9. cTS _C and time intervals (ΔcT _BACK , ΔcT _FORW ) between the time stamp (cTS _ST ) of the leading picture of the program content and the time stamp (cTS _EN ) of the trailing picture, respectively. About the time stamp (rTS _R) of the reference picture of the recorded program is obtained to the time stamp _(ST rTS) and the time step (ΔrT _BACK, ΔrT _FORW) with a time stamp (rTS _EN) of the aft-picture of the first picture, respectively. Then, the corresponding time intervals of the obtained recorded program and the received program content are compared to determine the completeness or lack of the recorded program. That is, if ΔrT _BACK ≥ΔcT _BACK and ΔrT _FORW ≥ΔcT _{FORW, the} recording program is judged to be intact (S90) .If ΔrT _BACK <ΔcT _BACK, the head of the program is S91, and if ΔrT _FORW <ΔcT _FORW , The rear end is determined to be unrecorded (S92). If both conditions (ΔrT _BACK <ΔcT _BACK and rT _FORW <ΔcT _FORW ) are satisfied, it is determined that there is a shortage in both the front and rear portions (S93). At this time, the _unrecorded portion to be identified is the interval 1010 from the beginning of the program content to the time ΔT _BackSup (= ΔcT _BACK -ΔrT _BACK ) as shown in FIG. 10A, or as shown in FIG. 10B. The interval 1020 from the trailing edge to ΔT _ForwSup (= ΔcT _FORW -ΔrT _FORW ).

In order to identify the section corresponding to the shortage of the recorded program on the program content, the controller 20 calculates a time stamp for the end point (in case of FIG. 10A) or the start point (in case of FIG. 10B) of the corresponding section. That is, in FIG. 10A, the timestamp _obtained by adding ΔT _BackSup to the timestamp of the head 1001 of the program content, and ΔT _ForwSup is subtracted from the timestamp of the tail 1011 of the program content in FIG. 10B. Where I picture or group of pictures with I pictures, having a calculated time stamp (preferably a timestamp that is closest to the calculated time stamp and not past that value) is stored ( End and / or start of a cell (811 in FIG. 8A or 821 in FIG. 8B) for a supplemental section of the program content, for the value of the storage location when the recorded program data is moved to and stored on the recorded file. Record as the address of the branch. In this way, the configuration information of the recorded program file, as illustrated in Fig. 8A or 8B, is constructed.

After identifying the lacking part of the recorded program and identifying the supplementary section, as in the above-described embodiment, only the supplementary section may be recorded in the recorded program file.

In one embodiment according to the present invention, instead of designating a supplemental section for a recorded program as a separate cell, as shown in FIG. 8A or 8B, data of the supplementary section may be physically merged into the recorded program data. In this embodiment, only the cell information is modified in the recording item information of the file for the recorded program generated after recording as shown in Fig. 6, and no additional cell information is written. First, the controller 20 temporarily generates a file as shown in FIG. 8A or 8B to compensate for the shortage caused by the additionally acquired program content, separately from the recorded program file, and then configures the configuration information of the generated temporary file. The recorded program data and supplemented content data are re-encoded while being reproduced in the cell order. That is, when a temporary file is configured as in the case of FIG. 8A, the supplementary content data section 812 of the first cell is read and decoded by the decoder 15, and recording of the second cell immediately after decoding of the section is completed. The program data is read and decoded by the decoder 15. The decoded data is stored in the main memory 17 as a frame sequence. For the stored frame sequence, the controller 20 applies an encoding algorithm corresponding to the decoder 15. Will be encoded again. In some cases, a muxing operation for converting the encoded data into an output stream of the demultiplexer 10 may be additionally performed. In one embodiment according to the present invention, the apparatus of FIG. 2 may further include a hardware device that performs an encoding algorithm. With the data encoded as above, the recorded program data area in the recorded program file of FIG. 6 is updated, and the final recording position addrNe of the cell is changed to reflect the changed data size. As such, when data merging that is insufficient for the recording program is completed, the status of the recording item in the recording item information is marked as 'complete'.

Thereafter, when the controller 20 selects one recorded program from a list of suitable programs to be provided by the screen signal generator 18, the controller 20 corresponds to the selected recorded program. Read the data of the storage section designated according to the cell order in the recorded program file configured as 8a or 8b, or recoded and merged program data having the structure as shown in FIG. Data of a storage section designated by a cell in a file having merged data) is read and applied to the decoder 15 through the buffer memory 12 to be decoded and output. In one embodiment according to the present invention, as described above, the parser 11 may be input to the parser 11 according to the format of the broadcast program and / or supplemented program data recorded on the hard disk 13. The audio / video signal decoded and output by the decoder 15 is applied to a display and a speaker or another device, such as a TV, which are integrated with the apparatus of FIG. You can watch.

In another embodiment according to the present invention, instead of using the access information specified by the user for the channel or repeater as described above, recording is performed by searching on a search site selected by the user and / or selected from a menu provided. It is also possible to obtain program content corresponding to a program. For example, the control unit 20 may include program identification information (broadcaster, recording time information (corresponding to a broadcasting time zone), a program in the recording item information 61 stored in a designated and / or selected search site as shown in FIG. 6). Name, etc.) is transmitted through the data communication unit 16 to request a search and receive a result page according to the search. When a plurality of search sites are designated (for example, a media server in a home network and an external public portal site), a plurality of result pages may be received. In the result page, information items corresponding to the recorded program are identified, and one program content is selected from among the program contents respectively linked to the information items to request transmission. When the corresponding program content is received and stored according to the request, as described above, the shortage of the recorded program is identified and supplemented based on the program content.

According to an embodiment of the present invention, when selecting one information item from the information items corresponding to the recorded program, the information item of the content source estimated to be the closest (the shortest transmission / reception time) on the network path is selected. Choose. To this end, the control unit 20 obtains an IP address (fixed IP and / or floating IP) of a URL which is associated with information items corresponding to a recording program in a hypertext manner, respectively (in this case, if necessary, Obtain an IP address corresponding to a URL from a DNS (Domain Name System) server.) Perform a transmission / reception time test, for example, a ping test, for each IP address. The result of this test selects the information item with which the IP indicating the shortest time is associated and requests the transmission of the corresponding program content. According to the scheme in this embodiment, if the program content already downloaded by another user is in another device on the home network, it is possible to obtain a lacking portion of the recorded program without using an external communication network unnecessarily. do.

In the above-described embodiments, the shortage of the recorded broadcast program is confirmed after recording the broadcast program, and the shortage is compensated for. However, in other embodiments of the present invention, the shortage for the video content other than the recorded broadcast program. You can also check and replenish. For example, the video content (broadcast program, video file, video clip, etc.) is first obtained and stored through a communication network or an connected storage device, for example, a USB memory or an SD memory, and recorded information (save section) Information, the name of the video content, the source information from which the video content was obtained, etc.), and automatically or at the request of the user, all or a part of the video content including the content of the video content is transmitted through the communication network. After the second acquisition, the second acquired video content is checked for a shortage of the first acquired video content, and if it is determined that there is a shortage, the shortage is supplemented from the second obtained video content. After replenishing as described above, the record information is updated so that the record information of the first obtained video content includes the replenished section, and then the replenished sections are subsequently ordered based on the updated record information. By properly reproducing, the user can watch the image contents made intact. In the present embodiments, since it is highly unlikely to be suitable for use in identifying a section lacking the time information for acquiring the video content primarily, it is preferable to use the primary section using the short section checking method illustrated in FIG. 9. Identify the lack of the acquired video content.

On the other hand, the present invention is not limited to the above-described typical preferred embodiments, but can be carried out in various ways without departing from the spirit and the subject matter of the present invention in various ways that can be carried out in the art Those of ordinary skill can easily understand. If such improvement, change, substitution or addition is carried out within the scope of the appended claims, the technical spirit should also be regarded as belonging to the present invention.

DESCRIPTION OF SYMBOLS 9 Signal demodulator 10 Demultiplexer 11 Parser 12 Buffer memory 13 Hard disk 15 Decoder 16 Data communication unit 17 Main memory 18 Screen signal generator 19 Mixer 20 Control unit 20a System memory 20b Real-Time Clock (RTC)

Claims (26)

A method of supplementing a recorded program, the method comprising: acquiring, via a data communication network, a part or all of program content completely including contents of a recorded program from a broadcast signal; Identifying a replenishment section corresponding to the deficit, and updating the recording information for the recorded program so that the identified replenishment section can be reproduced in sequence with the recorded program. The method of claim 1, wherein the identifying of the supplementary section comprises: comparing a recording time zone recorded in the recording information with information of an actual broadcast time zone provided in association with the program content. Identifying the replenishment interval corresponding to the deficit. The method of claim 2, wherein the obtaining comprises identifying a supplementary section on the program content corresponding to a shortage of the recorded program and obtaining a part of the program content corresponding to the identified supplementary section through the data communication network. How to do. The method of claim 1, wherein the identifying of the supplementary section comprises: finding matching pictures of the same scene on the recorded program and the acquired program content, and up to a head of the recorded program of the matching picture. Obtaining a forward time interval up to a trailing edge and a trailing edge, respectively, and obtaining a forward time interval up to the beginning and trailing edge of the program content of the matched picture, respectively, comparing each of the obtained backward time intervals and the forward time And identifying the replenishment interval corresponding to the shortage of the recorded program through mutual comparison of the data. The method of claim 4, wherein the step of finding matching pictures is to find in intra coded pictures of the recorded program and the obtained program content. The method of claim 1, further comprising converting an encoding format of the supplemental section of the obtained program content into a format decodable by a decoder for decoding the recorded program. The recording method of claim 1, wherein the updating comprises updating section information including section information indicating a section of the recorded program and section information indicating the identified supplementary section of the program content. How to be. The method of claim 1, wherein the updating comprises: configuring the recorded supplementary program of the program content so that the identified supplementary section of the program content is filled in a corresponding short section of the recorded program; And (i) updating the recording information to include section information indicating a section. The method of claim 1, wherein the acquiring comprises specifying the program content in the data communication network based on program identification information including program provider information and a program name recorded in the recording information of the recorded program. How to obtain. The method of claim 1, wherein the obtaining comprises: checking a communication time with each of the sources having the program content, and obtaining the program content from a source requiring the shortest communication time. Way. An apparatus for receiving and recording a broadcast program, The apparatus comprising: a receiver for receiving a broadcast program from a broadcast signal, a decoder for decoding and outputting data of the received broadcast program, and a storage unit for storing the received broadcast program And a communication unit for exchanging data or information with an external device through a data communication network, and a control unit for performing a control operation for receiving or recording a broadcast program according to a user's request. After recording the broadcast program received at the receiving unit in the storage unit and recording the recording information for the recorded program, the program unit may acquire some or all of the program content including the contents of the recorded program through the communication unit. The recorded program in the acquired program content. The identified supplementary period corresponding to the gap of the ram, and then the identified replacement interval is configured to update the record information able to be reproduced according to the order along with the recorded program material. The apparatus of claim 11, wherein the controller is configured to automatically acquire part or all of the program content, identify the supplementary section, and update the recording information after recording the recording information. The apparatus of claim 11, wherein the controller is further configured to acquire part or all of the program content, identify the supplementary section, and update the recording information when the user requests a specific request. The apparatus of claim 11, wherein the recorded program is recorded by a reserved recording item set by a user. The apparatus of claim 11, wherein the recorded program is recorded directly in response to a recording request of a user. The supplementary apparatus of claim 11, wherein the controller compares a recording time zone recorded in the recording information with information of an actual broadcast time zone provided in association with the program content and corresponds to a shortage of the recorded program. And configured to identify the interval. The apparatus of claim 16, wherein the controller is configured to identify a supplementary section on the program content corresponding to a shortage of the recorded program and obtain a part of the program content corresponding to the identified supplementary section through the communication unit. Device. The apparatus of claim 11, wherein the controller is further configured to find a matched picture of the same scene on the recorded program and the acquired program content, and forward time from the reverse direction to the tail and the trailing end of the recorded program of the matched picture. Obtaining each time interval, and obtaining a forward time interval up to the beginning and a trailing edge of the program content of the matched picture, respectively, and comparing the obtained reverse time intervals with each other by comparing the recorded time intervals with the recorded program. And identify the replenishment interval corresponding to the shortage of. The apparatus of claim 18, wherein the control unit is configured to find the matching picture in intra coded pictures of the recorded program and the obtained program content. The method of claim 11, wherein the controller is further configured to perform a process of converting an encoding format of the supplementary section of the obtained program content into a format that can be decoded by a decoder for decoding the recorded program. Device. The recording information of claim 11, wherein the controller is further configured to update the recording information by including section information indicating a section of the recorded program and section information indicating the identified supplementary section of the program content. And configured to update to be included in the. According to claim 11, The control unit, when updating the recording information, so that the identified replenishment section of the program content is filled in the corresponding lack section of the recorded program, and configured as one recorded program, the configured And update the recorded information to include the section information indicating the entire section of the recorded program. The apparatus of claim 11, wherein the controller is further configured to specify the program content in the data communication network based on program identification information including program provider information and a program name recorded in the recording information of the recorded program. And configured to control the communication unit. The method of claim 11, wherein the controller controls the communication unit to check a communication time with each of the sources having the program content, and obtains the program content from a source that requires the shortest communication time. And configured to control the communication unit. A method for supplementing video content, the method comprising: storing first video content and generating record information of the first video content; part or all of the second video content completely including the content of the first video content Acquiring the data through a data communication network; identifying a replenishment section corresponding to a shortage of the first image content in the acquired second image content, and the identified replenishment section together with the first image content. Updating the record information to be reproduced according to the method. An apparatus for processing image content, the apparatus comprising: a storage unit for storing image content, a decoder for decoding and outputting data of the stored image content, and a communication unit for exchanging data or information with the outside via a data communication network; And a control unit configured to perform a control operation for storing or decoding the broadcast program according to a user's request, wherein the control unit stores the first image content in the storage unit and records record information thereof. Subsequently, a part or all of the second video content that completely includes the content of the first video content is obtained through the communication unit, and replenishment corresponding to the shortage of the first video content in the obtained second video content. After identifying the section, the identified supplementary section is played in order with the first video content. Can allow the device is configured to update the record information.

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