JP2007180814A - Broadcast receiving and recording apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively record a broadcast program received at present by a simple constitution without wasting a recording capacity even if a receiving environment is changed accompanied by movement without requiring a complicated function such as automatic rebroadcast recording reservation following the detection of the reduction of recording quality in a broadcast receiving and recording apparatus especially suitable for being mounted to a mobile object. <P>SOLUTION: When a broadcast receiving level measured and binarized by VER or an SN ratio in a receiving sensitivity measuring part 20 is deteriorated to an unreceivable level "L", a control signal of a "recording stop" is outputted from a recording control device 21 to a display control device 16 and an encoder 18 to display a message of the "recording stop" to a TV monitor 17 and stop recording in a storage device 19. When the broadcast receiving level is improved to a receivable level "H", a control signal of "recording" is outputted from the recording control device 21 to the encoder 18 to restart recording in the storage device 19. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a broadcast receiving and recording apparatus that has a function of receiving and recording a television broadcast, and is particularly suitable for being mounted on a mobile body.

  Conventionally, television broadcasts are widely received and viewed by a television receiver mounted on a moving body such as an automobile. Attempts have also been made to record television programs received during the movement.

  However, since the reception environment of broadcast radio waves changes every moment when the moving body is moving, it is difficult to display a stable program screen in a stable reception state, and the same applies to the recording.

  A variety of reception technologies such as diversity reception have been proposed as techniques for improving the reception status while moving, but in order to completely prevent the reception status from being affected by the broadcast area, building, geographical environment, etc. Has its own limits.

  For this reason, if you simply receive a television broadcast and watch it, the program screen will sometimes be difficult or invisible while you are moving. Even a program portion that becomes difficult or invisible is recorded on a recording medium such as an HDD (Hard Disc Drive), a DVD (Digital Versatile Disc), or a flash ROM, and the recording capacity is wasted.

On the other hand, it is a recording / playback apparatus called a general stationary type video recorder, which monitors the deterioration of the recording quality, and when the quality deterioration occurs, the recording rate is lowered or the recording is stopped to reduce the recorded area. There has been proposed an information recording / reproducing apparatus that acquires an EPG (Electronic Program Guide) and performs automatic recording reservation for rebroadcast after erasing (see, for example, Patent Document 1).
JP 2005-176084 A

  Therefore, it is conceivable to use the information recording / reproducing apparatus as disclosed in Patent Document 1 mounted on a moving body. However, after detecting a decrease in recording quality and reducing the recording rate, or after stopping recording, Even when re-broadcast automatic recording reservations are made, since it is originally a mobile object, it is inevitable that the reception environment will change even during the re-broadcast recording, and effective re-recording is not always possible. .

  In addition, when re-broadcasting itself is not scheduled, there is a problem that the actual shooting is missed, such as the recording content with the recording rate lowered or the recording stopped.

  The present invention has been made in view of such a problem, and does not require complicated functions such as automatic re-broadcast recording reservation accompanying detection of a decrease in recording quality, and can be easily performed even if there is a change in reception environment due to movement. An object of the present invention is to provide a broadcast receiving and recording apparatus that can effectively record a broadcast program that is currently being received with a simple configuration without wasting recording capacity.

  In the broadcast receiving and recording apparatus according to claim 1 of the present invention, the broadcast signal measured by the reception level measuring means when the recording means records the video / audio signal obtained from the broadcast signal received by the broadcast receiving means. Depending on whether or not the reception level is lower than a preset value, recording of video / audio signals by the recording means is stopped if it is lower than a set value, and if it is higher than the set value, The recording of video / audio signals by the recording means was resumed.

  According to the broadcast receiving and recording apparatus according to the present invention, a simple configuration is possible even when there is a change in the reception environment due to movement without requiring complicated functions such as re-broadcast automatic recording reservation accompanying the detection of a decrease in recording quality. It is possible to effectively record a broadcast program currently being received without wasting recording capacity.

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
FIG. 1 is a block diagram showing a configuration of an in-vehicle broadcast receiving / recording / reproducing apparatus according to the first embodiment of the present invention.

  The operation of each part of the broadcast receiving / recording / reproducing apparatus is controlled by a command signal from a CPU (Central Processing Unit) which is program-controlled.

  This broadcast receiving / recording / reproducing apparatus receives a broadcast signal transmitted from a broadcasting station and reproduces video and audio contained in the received signal, and the reproduced video and audio as video and audio data on a recording medium. Has the function of recording.

  For example, a broadcast channel of a terrestrial digital television broadcast received by the TV antenna 11 is selected by a tuner 12, and the signal of the selected broadcast channel is OFDM (Orthogonal Frequency Division Multiplex). ) 13.

  The OFDM 13 demodulates a broadcast channel signal transmitted / received / tuned in a multi-carrier system, and the demodulated channel signal is supplied to a DeMUX (De Multiplex) 14 to receive a video signal, an audio signal, Separated into data broadcast signals.

  The video signal, audio signal, and data broadcast signal separated by the DeMUX (De Multiplex) 14 are decoded and D / A converted by a decoder 15 and are displayed on a TV monitor by a display control device 16. 17 is output and reproduced.

  On the other hand, the decoded output from the decoder 15 is also supplied to an encoder 18, which is A / D converted and re-encoded by the encoder 18 for replaying the received video signal, audio signal, data broadcast. The signal is recorded (video recording) in a storage device 19 using an HDD (Hard Disc Drive), a DVD (Digital Versatile Disc) or the like in accordance with a control signal from the recording control device 21.

  Here, the encoder 18 has a function of selectively switching recording / stopping with respect to the storage device 19 in accordance with a control signal from the recording control device 21.

  The broadcast channel signal selected and output by the tuner 12 is also supplied to the reception sensitivity measuring unit 20, and the reception level is BER (Bit Error Ratio: error bit rate within a predetermined time) or C / N (Carrier). / Noise) ratio, etc., and this reception level measurement signal is output to the recording control device 21.

  FIG. 2 is a timing chart showing a comparison between the broadcast reception level and the recording / stopping operation thereof by the in-vehicle broadcast receiving / recording / reproducing apparatus of the first embodiment.

  The recording control device 21 is “H” when the reception level measurement signal input from the reception sensitivity measurement unit 20 is at a reception level at which broadcast reception is possible (video / audio reproduction is possible), and at a level at which reception is not possible. A binarization process of “L” is performed, and the encoder 18 and the display control device 16 are controlled in accordance with the binarized reception level. Each of the two values at the time of reception level measurement and after a predetermined time T has elapsed. When both of the digitized reception levels are “H”, a recording permission control signal for the storage device 19 is output to the encoder 18.

  On the other hand, when each of the binarized reception levels is “L” at the time of reception level measurement and after a predetermined time T has elapsed, control of display of “recording stop message” on the TV monitor 17 to the display control device 16 is performed. In addition to outputting a signal, a recording stop control signal for the storage device 19 is output to the encoder 18.

  Here, the predetermined time T is a length of time that is acceptable for the viewer (for example, when the broadcast reception level temporarily decreases to a level at which broadcast reception is not possible due to a change in the reception environment during movement, for example) 1 second).

  The video signal, the audio signal, and the data broadcast signal selectively recorded in the storage device 19 are recombined by the decoder 15 according to a reproduction operation by the user, and output to the TV monitor 17 by the display control device 16. Played.

  Next, a broadcast receiving operation by the in-vehicle broadcast receiving / recording / reproducing apparatus according to the first embodiment having the above-described configuration will be described.

  FIG. 3 is a flowchart showing a broadcast reception recording process by the in-vehicle broadcast reception recording / playback apparatus of the first embodiment.

  For example, when recording a broadcast program selected and received by the tuner 12 and played back on the TV monitor 17, when the start of recording is instructed, the reception level measured by the reception sensitivity measuring unit 20 is (step S1). It is input to the recording control device 21 and binarized (step S2).

  When the predetermined time T has elapsed (step S3), it is determined whether or not the binarized reception level at the time of reception sensitivity measurement before the time T has elapsed is “H” (receivable level) (step S4). When the reception level is determined to be “H”, a recording instruction control signal is output from the recording control device 21 to the encoder 18, and the video signal, audio signal, and data of the broadcast program re-encoded by the encoder 18. The broadcast signal is recorded by the storage device 19 (step S5).

  On the other hand, when the predetermined time T has elapsed (step S3), when it is determined that the binarized reception level at the time of reception sensitivity measurement before the time T has elapsed is “L” (reception impossible level) (step S4). (No)), however, if it is determined that the binarized reception level after the predetermined time T has elapsed is “H” (receivable level) (step S6 (Yes)), for example, FIG. As indicated by timing t1, a recording instruction control signal is output from the recording control device 21 to the encoder 18 as described above, and the video signal, audio signal, and data broadcast signal of the broadcast program re-encoded by the encoder 18 are output. Is recorded by the storage device 19 (step S5).

  On the other hand, it is determined that the binarized reception level at the time of reception sensitivity measurement before the lapse of time T is “L” (reception impossible level) (step S4 (No)), and after the predetermined time T has elapsed. When it is determined that the binarized reception level is also “L” (unreceivable level) (step S6 (No)), the recording control device 21 displays a “recording stop message” on the display control device 16. Is output to the TV monitor 17 and a "recording stop" message is displayed on the TV monitor 17 (step S7). At the same time, for example, as shown at timing t2 in FIG. The recording operation for the storage device 19 is stopped (step S8).

  Thereafter, when it is determined again that the binarized reception level at the time of reception sensitivity measurement has recovered to “H” (receivable level) (steps S1 to S4 (Yes)), for example, at timing t3 in FIG. As shown, a recording instruction control signal is output from the recording control device 21 to the encoder 18 again, and the video signal, audio signal, and data broadcast signal of the broadcast program re-encoded by the encoder 18 are stored in the storage device 19. Recording is resumed (step S5).

  Therefore, according to the broadcast receiving function of the in-vehicle broadcast receiving / recording / reproducing apparatus of the first embodiment having the above configuration, the broadcast reception level measured by the BER or S / N in the reception sensitivity measuring unit 20 and binarized is not received. When the level becomes “L”, the recording control device 21 outputs a “recording stop” control signal to the display control device 16 and the encoder 18 and displays a “recording stop” message on the TV monitor 17. When the recording to the storage device 19 is stopped and the broadcast reception level is improved to the receivable level “H”, the recording control device 21 outputs a “recording” control signal to the encoder 18. Since the recording to the storage device 19 is resumed, even if there is a continuous change in the reception environment accompanying the movement, the current reception is performed with a simple configuration. Consisting of the broadcast program to be able to effectively record without wasting the recording capacity.

(Second Embodiment)
FIG. 4 is a block diagram showing the configuration of an in-vehicle broadcast receiving / recording / reproducing apparatus according to the second embodiment of the present invention.

  In the in-vehicle broadcast receiving / recording / reproducing apparatus of the second embodiment, the same components as those of the broadcast receiving / recording / reproducing apparatus of the first embodiment in FIG. .

  That is, in the broadcast receiving / recording / reproducing apparatus of the second embodiment, the encoder 18A sets the recording rate (for example, MPEG recording compression rate) for the storage device 19 to “High” (high) according to the control signal from the recording control apparatus 21A. Capacity) or “Low” (low capacity).

  FIG. 5 is a timing chart showing a comparison between the broadcast reception level and the recording rate changing operation by the in-vehicle broadcast reception recording / reproducing apparatus of the second embodiment.

  The recording control device 21A is “H” when the reception level measurement signal input from the reception sensitivity measurement unit 20 is a reception level at which broadcast reception is possible (video / audio reproduction is possible), and “ In addition to performing binarization processing of L ″ and controlling the encoder 18A according to the binarized reception level, each of the binarized reception levels at the time of reception level measurement and after the elapse of a predetermined time T is determined. When “H” is also “H”, a control signal for changing the recording rate for the storage device 19 to “High” (large capacity high image quality) is output to the encoder 18A.

  On the other hand, when each of the binarized reception levels at the time of reception level measurement and after the elapse of a predetermined time T is “L”, the recording rate for the storage device 19 is set to “Low” (low capacity low) for the encoder 18A. A control signal to be changed to (image quality) is output.

  Next, a broadcast receiving operation by the in-vehicle broadcast receiving / recording / reproducing apparatus of the second embodiment having the above-described configuration will be described.

  FIG. 6 is a flowchart showing a broadcast reception recording process by the in-vehicle broadcast reception recording / playback apparatus of the second embodiment.

  In the broadcast receiving operation by the in-vehicle broadcast receiving / recording / reproducing apparatus of the second embodiment, the same processing steps as the broadcast receiving operation of the first embodiment in FIG. Is omitted.

  That is, when it is determined that the binarized reception level at the time of reception sensitivity measurement before the elapse of time T is “H” (receivable level), the recording rate “High” is sent from the recording control device 21A to the encoder 18A. "(Large-capacity high-quality) control signal is output, and the video signal, audio signal, and data broadcast signal of the broadcast program re-encoded by the encoder 18A are recorded by the storage device 19 at a high-capacity high-quality recording rate. (Step S5a).

  On the other hand, even when it is determined that the binarized reception level at the time of reception sensitivity measurement before the elapse of time T is “L” (reception impossible level) (step S4 (No)), after the elapse of the predetermined time T. When it is determined that the binarized reception level is “H” (receivable level) (step S6 (Yes)), for example, as shown at timing t1 in FIG. A control signal of the recording rate “High” (large capacity high image quality) is output from the encoder 21A to the encoder 18A, and the video signal, audio signal, and data broadcast signal of the broadcast program re-encoded by the encoder 18A are large in capacity and high. Recording is performed in the storage device 19 at a recording rate of image quality (step S5a).

  On the other hand, it is determined that the binarized reception level at the time of reception sensitivity measurement before the lapse of time T is “L” (reception impossible level) (step S4 (No)), and after the predetermined time T has elapsed. If it is determined that the binarized reception level is also “L” (unreceivable level) (step S6 (No)), for example, as shown at timing t2 in FIG. A change control signal to “Low” (low capacity and low image quality) is output, and the video signal, audio signal, and data broadcast signal of the broadcast program re-encoded by the encoder 18A are changed to a low capacity and low image quality recording rate. Is recorded in the storage device 19 (step S7a).

  Thereafter, when it is determined again that the binarized reception level at the time of reception sensitivity measurement has recovered to “H” (receivable level) (steps S1 to S4 (Yes)), for example, at timing t3 in FIG. As shown in the figure, the recording control device 21A outputs a change control signal to the recording rate “High” (large capacity high image quality) to the encoder 18A, and the video signal and audio of the broadcast program re-encoded by the encoder 18A. The signal and the data broadcast signal are again changed to a large-capacity high-quality recording rate and recorded in the storage device 19 (step S5a).

  Therefore, according to the broadcast receiving function of the in-vehicle broadcast receiving / recording / reproducing apparatus of the second embodiment having the above configuration, the broadcast reception level measured by the BER or S / N in the reception sensitivity measuring unit 20 and binarized is not received. When the level is deteriorated to the possible level “L”, the recording control device 21A outputs a change control signal to the recording rate “Low” to the encoder 18A, and the recording capacity to the storage device 19 is reduced to record. When the broadcast reception level is improved to the receivable level “H”, the recording control device 21A outputs a change control signal to the recording rate “High” to the encoder 18A, and the recording capacity for the storage device 19 is increased. Since the recording is greatly restored, even if there is a continuous change in the reception environment due to movement, the broadcast number currently being received with a simple configuration. It is possible to effectively recorded without wasting recording capacity.

(Third embodiment)
FIG. 7 is a block diagram showing a configuration of an in-vehicle broadcast receiving / recording / reproducing apparatus according to the third embodiment of the present invention.

  In the in-vehicle broadcast receiving / recording / reproducing apparatus of the third embodiment, the same components as those of the broadcast receiving / recording / reproducing apparatus of the second embodiment in FIG. .

  That is, in the broadcast receiving / recording / reproducing apparatus of the third embodiment, the encoder 18B sets the recording rate (for example, MPEG recording compression rate) for the storage device 19 to “High” (high) according to the control signal from the recording control apparatus 21B. (Capacity) or “Low” (low capacity) or a function of selectively switching to recording stop.

  FIG. 8 is a timing chart showing a comparison between two-stage identification signals 1 and 2 of the broadcast reception level and the recording rate changing / stopping operation by the in-vehicle broadcast receiving / recording / reproducing apparatus of the third embodiment. .

  The recording control device 21B turns the identification signal 1 OFF “H” or “ON” when the reception level measurement signal input from the reception sensitivity measurement unit 20 is higher than the threshold 1 capable of high quality reception or lower than the threshold 1. L ”, two-stage binarization processing is performed for setting the identification signal 2 to OFF“ H ”or ON“ L ”when the signal is higher than the threshold value 2 that makes reception impossible or less than the threshold value 2. The encoder 18B is controlled in accordance with the binarized reception level identification signals 1 and 2, and the threshold value at which the identification signal 1 is OFF “H” after the elapse of a predetermined time T from the reception level measurement and is capable of high quality reception. When the reception level is higher than 1, a control signal for changing the recording rate for the storage device 19 to “High” (large capacity high image quality) is output to the encoder 18B.

  Further, even if the identification signal 2 is OFF “H” and the reception level is higher than the minimum receivable threshold value 2, the identification signal 1 is turned ON “L” and the reception level is lowered to the reception level equal to or lower than the threshold value 1 that enables high quality reception. Then, a control signal for changing the recording rate for the storage device 19 to “Low” (low capacity, low image quality) is output to the encoder 18B.

  Further, when the identification signal 2 is also turned ON “L” and has fallen to a reception level equal to or lower than the minimum receivable threshold value 2, a recording stop control signal for the storage device 19 is output to the encoder 18B.

  Next, the broadcast receiving operation by the in-vehicle broadcast receiving / recording / reproducing apparatus of the third embodiment having the above-described configuration will be described.

  FIG. 9 is a flowchart showing a broadcast reception recording process by the in-vehicle broadcast reception recording / playback apparatus of the third embodiment.

  For example, when recording a broadcast program selected and received by the tuner 12 and played back on the TV monitor 17, when the start of recording is instructed, the reception level measured by the reception sensitivity measuring unit 20 is (step A1). It is determined whether it is the threshold value 1 that is input to the recording control device 21B or lower or higher than the threshold value 1 (step A2), and it is determined that the reception level is higher than the threshold value 1, that is, the reception level is high quality reception. In the case (step A2 (No)), both the identification signals 1 and 2 are set to OFF “H” (step A3).

  When the predetermined time T has elapsed (step A4), it is determined that both the identification signals 1 and 2 are OFF “H”, and if the reception level is high quality reception (step A5 (No) → A6 (No )) For example, as shown at timing t1 in FIG. 8, a control signal of the recording rate “High” (large capacity high image quality) is output to the encoder 18B, and the video of the broadcast program re-encoded by the encoder 18B. The signal, audio signal, and data broadcast signal are recorded in the storage device 19 at a large-capacity high-quality recording rate (step A7).

  On the other hand, when it is determined that the reception level measured by the reception sensitivity measuring unit 20 and input to the recording control device 21B is equal to or lower than the threshold 1 at which high-quality reception is possible (step A2 (Yes)), the identification signal 1 is turned ON "L" (step A8).

  If it is determined that the input reception level is higher than the lowest receivable threshold 2 (step A9 (No)), the identification signal 2 is turned OFF “H” (step A10).

  When the predetermined time T elapses (step A4), even if the identification signal 2 is determined to be OFF “H” and the minimum receivable reception level is exceeded (step A5 (No)), the identification signal 1 is turned on. If it is determined as “L” and the reception level is equal to or lower than the reception level at which high quality reception is possible (step A6 (Yes)), for example, as shown at timing t2 in FIG. Change control signal to low capacity and low image quality) is output, and the video signal, audio signal, and data broadcast signal of the broadcast program re-encoded by the encoder 18B are changed to the recording capacity of low capacity and low image quality, and the storage device 19 (Step A11).

  On the other hand, if it is determined that the reception level measured by the reception sensitivity measuring unit 20 and inputted to the recording control device 21B is equal to or lower than the threshold 2 that can be received at the minimum (step A9 (Yes)), the identification signals 1 and 2 Both are turned ON "L" (step A12).

  Then, when the predetermined time T has elapsed (step A4), when the identification signal 2 is determined to be ON “L” and is below the minimum receivable reception level (step A5 (Yes)), for example, FIG. As indicated by timing t3, a recording stop control signal is output to the encoder 18B, and the recording operation for the storage device 19 is stopped (step A13).

  Thereafter, when both the identification signals 1 and 2 are determined to be OFF “H” and the reception level is restored to a high quality reception level (step A5 (No) → A6 (No)), for example, at timing t4 in FIG. As shown in FIG. 5, a change control signal of the recording rate “High” (large capacity high image quality) is output to the encoder 18B, and the video signal, audio signal, and data broadcast signal of the broadcast program re-encoded by the encoder 18B. Is again changed to a large-capacity high-quality recording rate and recorded in the storage device 19 (step A7).

  Therefore, according to the broadcast receiving function of the in-vehicle broadcast receiving / recording / reproducing apparatus of the third embodiment having the above-described configuration, it is possible to receive the broadcast reception level measured by the BER or S / N at the reception sensitivity measuring unit 20 with high quality. Judgment as “H” “L” binarized identification signal 1 depending on whether threshold 1 is exceeded or as “H” “L” binarized identification signal 2 depending on whether minimum receivable threshold 2 is exceeded If both the identification signals 1 and 2 become “L” and the broadcast reception level deteriorates to a level at which reception is impossible, the recording control device 21B outputs a “recording stop” control signal to the encoder 18B. Then, recording on the storage device 19 is stopped. When only the identification signal 2 becomes “H” and the broadcast reception level recovers beyond the minimum receivable level, the recording control device 21B sends a change control signal to the recording rate “Low” to the encoder 18B. When the recording capacity of the storage device 19 is reduced and the recording is resumed, and the identification signals 1 and 2 are both “H” and the broadcast reception level is restored to a level capable of high quality reception, the recording control device 21B outputs a control signal for changing the recording rate to “High” to the encoder 18B, and the recording capacity for the storage device 19 is increased for recording, so there is a continuous change in the reception environment accompanying movement. Even in this case, it is possible to effectively record the broadcast program currently being received with a simple configuration without wasting recording capacity.

(Fourth embodiment)
FIG. 10 is a block diagram showing a configuration of an in-vehicle broadcast receiving / recording / reproducing apparatus according to the fourth embodiment of the present invention.

  In the in-vehicle broadcast receiving / recording / reproducing apparatus of the fourth embodiment, the same components as those of the broadcast receiving / recording / reproducing apparatus of the second embodiment in FIG. .

  That is, in the broadcast receiving / recording / reproducing apparatus of the fourth embodiment, the encoder 18C sets the recording rate (eg, MPEG recording compression rate) for the storage device 19 to “High” (high) according to the control signal from the recording control apparatus 21C. (Capacity) or “Low” (low capacity), and a function of recording the discrimination flag in the recording signal when the recording rate is changed.

  FIG. 11 is a timing chart showing a comparison between the broadcast reception level, the change of the recording rate, and the determination flag setting operation by the in-vehicle broadcast reception / recording / reproducing apparatus of the fourth embodiment.

  The recording control device 21C is “H” when the reception level measurement signal input from the reception sensitivity measuring unit 20 is a reception level at which broadcast reception is possible (video / audio reproduction is possible), and “ In addition to performing binarization processing of L ″ and controlling the encoder 18C according to the binarized reception level, each of the binarized reception levels at the time of reception level measurement and after the elapse of a predetermined time T is determined. When “H” is also “H”, the control signal for changing the recording rate for the storage device 19 to “High” (large capacity high image quality) and recording the rate change determination flag is output to the encoder 18C.

  On the other hand, when each of the binarized reception levels is “L” at the time of reception level measurement and after the elapse of the predetermined time T, the recording rate for the storage device 19 is set to “Low” (low capacity low The control signal for recording the rate change determination flag is output.

  Then, the display control device 16A reads the video / audio signal of the broadcast program recorded in the storage device 19, decodes it through the decoder 15 and reproduces it on the TV monitor 17, and is included in the reproduction signal. And a function of skipping playback at the flag interval.

  Next, a broadcast receiving operation by the in-vehicle broadcast receiving / recording / reproducing apparatus of the fourth embodiment having the above-described configuration will be described.

  FIG. 12 is a flowchart showing broadcast reception recording processing by the in-vehicle broadcast reception recording / reproducing apparatus of the fourth embodiment.

  In the broadcast receiving operation by the in-vehicle broadcast receiving / recording / reproducing apparatus of the fourth embodiment, the same processing steps as those in the broadcast receiving operation of the second embodiment in FIG. Is omitted.

  That is, when it is determined that the binarized reception level at the time of reception sensitivity measurement before the elapse of time T is “H” (receivable level) (step S4 (Yes)), the current recording rate is “High”. If it is determined that it is not (step S4a (No)), for example, as shown at timing t2 in FIG. 11, the recording control device 21C changes the recording rate to “High” (large capacity high image quality) from the encoder 18C. Change control signal is output, a write control signal for the rate change determination flag is also output, the rate change determination flag is written from the encoder 18C to the storage device 19, and the video signal of the re-encoded broadcast program is also output. The audio signal and the data broadcast signal are recorded at a large capacity and high image quality recording rate (steps S4b, S5a, S5b).

  On the other hand, even when it is determined that the binarized reception level at the time of reception sensitivity measurement before the elapse of time T is “L” (reception impossible level) (step S4 (No)), after the elapse of the predetermined time T. If it is determined that the binarized reception level is “H” (receivable level) (step S6 (Yes)), for example, as shown at timing t1 in FIG. 11, the current recording rate “High” is displayed. The video signal, audio signal, and data broadcast signal of the broadcast program, which are maintained as the control signal “(large capacity high image quality)”, are continuously recorded at a large capacity high image quality recording rate (step S4a). (Yes)).

  On the other hand, it is determined that the binarized reception level at the time of reception sensitivity measurement before the lapse of time T is “L” (reception impossible level) (step S4 (No)), and after the predetermined time T has elapsed. When it is determined that the binarized reception level is also “L” (unreceivable level) (step S6 (No)), for example, as shown at timing t4 in FIG. A change control signal to “Low” (low capacity and low image quality) is output, a write control signal for a rate change determination flag is also output, a rate change determination flag is written from the encoder 18C to the storage device 19, and The video signal, audio signal, and data broadcast signal of the re-encoded broadcast program are changed to a low-capacity low-quality recording rate and recorded (steps S6a → S6b, S7a, S7b). .

  Thereafter, when it is determined again that the binarized reception level at the time of reception sensitivity measurement has recovered to “H” (receivable level) (steps S1 to S4 (Yes)), for example, at timing t2 in FIG. As shown, the recording control device 21C outputs a change control signal to the recording rate “High” (large-capacity high-quality) to the encoder 18C from the recording control device 21C, and writes the rate change determination flag write control signal. The rate change determination flag is written from the encoder 18C to the storage device 19, and the video signal, audio signal, and data broadcast signal of the re-encoded broadcast program are changed again to a large capacity high image quality recording rate. Are recorded (steps S4a → S4b, S5a, S5b).

  Next, the reproduction operation of the broadcast program recorded in the storage device 19 by such broadcast reception processing will be described.

  FIG. 13 is a timing chart for explaining an operation at the time of reproduction by the in-vehicle broadcast receiving / recording / reproducing apparatus of the fourth embodiment.

  When the video / audio signal of the broadcast program recorded in the storage device 19 is reproduced in response to a user operation, the video / audio signal of the recorded broadcast program read from the storage device 19 is sent via the decoder 15. The decryption process is performed, and the display control device 16A outputs to the TV monitor 17 for reproduction.

  At this time, the display control device 16A detects a rate change determination flag included in the video / audio signal to be reproduced, as shown in FIG. Then, in accordance with a command signal based on a user instruction, the read operation of the recorded video / audio signal from the storage device 19 is controlled at the interval of the rate change determination flag.

  Thereby, for example, when the broadcast reception level deteriorates, the video / audio recorded at the “Low rate” can be selectively skipped and reproduced.

  Therefore, according to the broadcast receiving function of the in-vehicle broadcast receiving / recording / reproducing apparatus of the fourth embodiment having the above configuration, the broadcast reception level measured by the BER or S / N in the reception sensitivity measuring unit 20 and binarized is not received. When the recording level is deteriorated to a possible level “L”, the recording control device 21C outputs a change control signal to the recording rate “Low” to the encoder 18C to reduce the recording capacity of the storage device 19 and record it. A rate change determination flag is written and recorded in the recording signal. When the broadcast reception level is improved to the receivable level “H”, the recording control device 21C outputs a change control signal to the recording rate “High” to the encoder 18C, and the recording to the storage device 19 is recorded. Since the capacity was recorded with the capacity restored and the rate change determination flag was written and recorded in the recording signal, even if there is a continuous change in the reception environment due to movement, the current configuration is simple. The broadcast program being received can be effectively recorded without wasting recording capacity.

  In addition, when the recorded contents are reproduced, a rate change determination flag written for each change point of the recording rate is detected in the video / audio signal read from the storage device 19, and the user can easily select any of them. Skip playback can be performed at flag intervals.

  Note that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention at the stage of implementation. Further, each of the embodiments includes inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some configuration requirements are deleted from all the configuration requirements shown in each embodiment or some configuration requirements are combined, the problems described in the column of problems to be solved by the invention can be solved, When the effects described in the “Effects of the Invention” can be obtained, a configuration in which these constituent elements are deleted or combined can be extracted as an invention.

1 is a block diagram showing a configuration of an in-vehicle broadcast receiving / recording / reproducing apparatus according to a first embodiment of the present invention. The timing chart which shows the broadcast reception level by the broadcast receiving / recording / reproducing apparatus for mounting | wearing of the said 1st Embodiment, and the recording / stop operation | movement with comparison. The flowchart which shows the broadcast reception recording process by the vehicle-mounted broadcast reception recording / reproducing apparatus of the said 1st Embodiment. The block diagram which shows the structure of the vehicle-mounted broadcast reception recording / reproducing apparatus which concerns on 2nd Embodiment of this invention. The timing chart which compares and shows the broadcast reception level by the vehicle-mounted broadcast reception recording / reproducing apparatus of the said 2nd Embodiment, and the change operation of the recording rate. The flowchart which shows the broadcast reception recording process by the vehicle-mounted broadcast reception recording / reproducing apparatus of the said 2nd Embodiment. The block diagram which shows the structure of the vehicle-mounted broadcast reception recording / reproducing apparatus which concerns on 3rd Embodiment of this invention. 9 is a timing chart showing comparison between two stages of broadcast reception level identification signals 1 and 2 and their recording rate changing / stopping operations by the in-vehicle broadcast receiving / recording / reproducing apparatus of the third embodiment. The flowchart which shows the broadcast reception recording process by the vehicle-mounted broadcast reception recording / reproducing apparatus of the said 3rd Embodiment. The block diagram which shows the structure of the vehicle-mounted broadcast reception recording / reproducing apparatus which concerns on 4th Embodiment of this invention. The timing chart which shows by contrast the broadcast reception level by the vehicle-mounted broadcast reception recording / reproducing apparatus of the said 4th Embodiment, the change of the recording rate, and determination flag setting operation | movement. The flowchart which shows the broadcast reception recording process by the vehicle-mounted broadcast reception recording / reproducing apparatus of the said 4th Embodiment. The timing chart for demonstrating the operation | movement at the time of the reproduction | regeneration by the vehicle-mounted broadcast reception recording / reproducing apparatus of the said 4th Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... TV antenna, 12 ... Tuner, 13 ... OFDM, 14 ... DeMUX, 15 ... Decoder, 16, 16A ... Display control part, 17 ... TV monitor, 18, 18A, 18B, 18C ... Encoder ( Encoder), 19 ... storage device, 20 ... reception sensitivity measuring unit, 21, 21A, 21B, 21C ... recording control device.

Claims (5)

A broadcast receiving and recording apparatus mounted on a mobile body and having a function of receiving, reproducing and recording a television broadcast,
Broadcast receiving means;
Recording means for recording a video / audio signal obtained from the broadcast signal received by the broadcast receiving means;
Reception level measuring means for measuring the reception level of the broadcast signal received by the broadcast receiving means;
Depending on whether or not the reception level of the broadcast signal measured by the reception level measuring means is equal to or higher than a preset value, the recording means stops the recording of the video / audio signal if it is lower than the preset value. Recording control means for resuming recording of the video / audio signal by the recording means when the set value is greater than or equal to the set value;
A broadcast receiving and recording apparatus comprising:   2. The broadcast reception recording apparatus according to claim 1, further comprising notification means for notifying recording stop when the reception level of the broadcast signal measured by the reception level measurement means is lower than a preset value. . A broadcast receiving and recording apparatus mounted on a mobile body and having a function of receiving, reproducing and recording a television broadcast,
Broadcast receiving means;
Recording means for recording a video / audio signal obtained from the broadcast signal received by the broadcast receiving means;
Reception level measuring means for measuring the reception level of the broadcast signal received by the broadcast receiving means;
Depending on whether or not the reception level of the broadcast signal measured by the reception level measuring means is equal to or higher than a preset value, the recording rate of the video / audio signal by the recording means when lower than the set value, A recording control means for setting the recording rate lower than the set value or more, and a recording control means for setting the recording rate of the video / audio signal by the recording means higher if the set value or more;
A broadcast receiving and recording apparatus comprising:   A discriminating information recording unit for recording discriminating information of the rate change point together with the recording of the video / audio signal by the recording unit when the recording rate of the video / audio signal by the recording unit is changed and set by the recording control unit; The broadcast receiving and recording apparatus according to claim 3, further comprising: A broadcast receiving and recording apparatus mounted on a mobile body and having a function of receiving, reproducing and recording a television broadcast,
Broadcast receiving means;
Recording means for recording a video / audio signal obtained from the broadcast signal received by the broadcast receiving means;
Reception level measuring means for measuring the reception level of the broadcast signal received by the broadcast receiving means;
The reception level of the broadcast signal measured by the reception level measuring means is compared with two preset high and low thresholds, and the reception level is higher than each threshold, between each threshold, or lower than each threshold. A reception level identifying means for identifying whether or not
When the reception level identifying means identifies that the reception level of the broadcast signal is higher than each threshold, it is set as a predetermined recording rate of the video / audio signal by the recording means, and is identified as being between each threshold. If it is determined, the recording rate of the video / audio signal by the recording means is set lower than the predetermined recording rate, and if it is determined to be lower than each threshold value, the recording rate of the video / audio signal by the recording means is set. Recording control means for stopping recording;
A broadcast receiving and recording apparatus comprising:

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