JP2012138856A - Video transmitter and three-dimensional video transmission program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a video transmitter which can achieve 3D broadcasting without introducing a new facility, and to provide a three-dimensional video transmission program for use in the video transmitter.SOLUTION: The video transmitter comprises a distribution unit, first and second decoders, and a video management unit. The distribution unit receives compression data for right eye and compression data for left eye, and outputs the compression data for right eye and compression data for left eye to different output destinations. The first decoder decodes the compression data for right eye and generates a video signal for right eye. The second decoder decodes the compression data for left eye and generates a video signal for left eye. The video management unit holds the video signal for right eye and the video signal for left eye, and generates a three-dimensional video signal based on the video signal for right eye and the video signal for left eye of the same frame being held according to three-dimensional reproduction control.

Description

  Embodiments described herein relate generally to a video transmission apparatus that transmits 3D video and a 3D video transmission program used in the video transmission apparatus.

  Traditionally, television broadcasts have only been represented in two dimensions (2D). However, a movie (3D movie) in which the image is expressed in three dimensions (3D: 3D) has been created due to the dead end of the 2D image expression. 3D movies have become explosive hits and are rapidly spreading in recent years.

  With the widespread use of 3D movies, 3D video content and playback devices are also progressing. Accordingly, 3D television broadcasting is also desired. However, 3D television broadcasting leads to a new introduction of 3D equipment for businesses that broadcast television. That is, for example, in order to make an existing 2D transmission server facility compatible with 3D video transmission, a new 3D-compatible transmission server facility, a 3D conversion device, and the like must be installed. As a result, there are problems that a large amount of funds and resources are required, such as equipment purchase costs, human resources for replacement, risk management, and installation space for new equipment.

Japanese Patent Laid-Open No. 10-243419

  As described above, although 3D television broadcasting is desired, there is a problem that a lot of funds and resources are required for newly introducing 3D equipment.

  Therefore, an object is to provide a video transmission apparatus capable of realizing 3D broadcasting without introducing new equipment, and a 3D video transmission program used for the video transmission apparatus.

  According to the embodiment, the video transmission apparatus includes a distribution unit, first and second decoders, and a video management unit. The distribution unit receives right-eye compressed data obtained by compressing right-eye video material and left-eye compressed data obtained by compressing left-eye video material, and the right-eye compressed data and left-eye compressed data are separately provided. Output to the output destination. The first decoder decodes the right-eye compressed data from the allocating unit and creates a right-eye video signal. The second decoder decodes the left-eye compressed data from the allocating unit and creates a left-eye video signal. The video management unit holds the video signal for the right eye and the video signal for the left eye, and based on the video signal for the right eye and the video signal for the left eye of the same frame held according to the 3D playback control for performing the 3D broadcasting. Create a 3D video signal.

It is a block diagram which shows the function structure of the video transmission apparatus which concerns on this embodiment. It is a figure at the time of the video transmission apparatus of FIG. 1 performing three-dimensional reproduction. It is a figure at the time of the conventional video transmission apparatus for 2D broadcasting performing two-dimensional reproduction.

  Hereinafter, embodiments will be described with reference to the drawings.

  FIG. 1 is a block diagram illustrating a functional configuration of a video transmission device 10 according to the present embodiment. The video transmission device 10 illustrated in FIG. 1 is connected to the data storage unit 20. The video transmission device 10 includes a reception unit 11, a distribution unit 12, a first decoder 13, a second decoder 14, a video management unit 15, and a control unit 16.

  The data storage unit 20 uses a video compression technique such as MPEG2 to convert compressed data for the right eye into a compressed file of the video signal material for the right eye, and compressed data for the left eye into a compressed file of the video signal material for the left eye. Storing. The video signal material for the right eye is obtained by photographing the subject to be photographed for the right eye. Also, the video signal material for the left eye is obtained by photographing the subject to be photographed for the left eye.

  The data storage unit 20 outputs one of the right-eye compressed data and the left-eye compressed data, which is set in advance, for example, the right-eye compressed data, to the video transmission device 10 according to reproduction control of the control unit 16 described later. Further, the data storage unit 20 outputs multiplexed data obtained by time-division multiplexing the compressed data for the right eye and the compressed data for the left eye to the video transmission device 10 according to the three-dimensional reproduction control of the control unit 16. In the following description, the case where the right-eye compressed data is output from the data storage unit 20 in accordance with the reproduction control of the control unit 16 will be described as an example, but the same applies to the case where the left-eye compressed data is output. It can be implemented.

  The receiving unit 11 receives right-eye compressed data or multiplexed data from the data storage unit 20.

  The allocating unit 12 outputs the right-eye compressed data received by the receiving unit 11 to the first decoder 13. The allocating unit 12 outputs the right-eye compressed data included in the multiplexed data received by the receiving unit 11 to the first decoder 13 and outputs the left-eye compressed data to the second decoder 14.

  The first decoder 13 converts the right-eye compressed data distributed by the distribution unit 12 into a right-eye video signal based on a preset decoding method. The first decoder 13 outputs the right-eye video signal to the video management unit 15.

  The second decoder 14 converts the left-eye compressed data distributed by the distribution unit 12 into a left-eye video signal based on a preset decoding method. The second decoder 14 outputs the left-eye video signal to the video management unit 15.

  The video management unit 15 includes a processing unit 151 and a memory 152. The memory 152 is composed of, for example, a plurality of flash memories, and has a first area for recording a right-eye video signal and a second area for recording a left-eye video signal.

  The processing unit 151 performs special reproduction such as pause and rewind reproduction of the video signal for the right eye from the first decoder 13 according to the special reproduction control from the control unit 16. At this time, the processing unit 151 holds the right-eye video signal in the first area of the memory 152, thereby adjusting the input speed and output speed of the right-eye video signal during special playback.

  The processing unit 151 also performs a 3D video signal based on the right-eye video signal from the first decoder 13 and the left-eye video signal from the second decoder 14 in accordance with the 3D playback control from the control unit 16. Create At this time, the processing unit 151 holds the right-eye video signal from the first decoder 13 in the first area, and holds the left-eye video signal from the second decoder 14 in the second area. Then, the processing unit 151 uses a technique such as side-by-side, frame-sequential, or line-by-line for the right-eye and left-eye video signals in the same frame among the right-eye video signal and the left-eye video signal that is held, thereby performing tertiary. Create the original video signal. The processing unit 151 outputs the created 3D video signal to the outside.

  Note that some video material compression methods have a correlation between frames. When the compressed data for the right eye and the compressed data for the left eye are compressed by a compression method having a correlation between frames, the decoded video signal includes a reproduction unit and an accompanying unit. The reproduction unit refers to a portion of the video signal that is actually desired to be reproduced, and the accompanying portion refers to a portion that is obtained along with the reproduction unit when the compressed data is decoded. The processing unit 151 creates a 3D video signal based on the reproduction unit excluding the accompanying part of the right-eye video signal and the reproduction unit excluding the accompanying part of the left-eye video signal.

  The control unit 16 performs reproduction control and three-dimensional reproduction control on the data storage unit 20 according to a preset broadcast program. For example, the control unit 16 performs reproduction control on the data storage unit 20 when 2D broadcasting is scheduled in the broadcast program. Further, the control unit 16 performs three-dimensional reproduction control on the data storage unit 20 and the video management unit 15 when 3D broadcasting is scheduled in the broadcast program.

  In addition, when an instruction to execute special reproduction is input, the control unit 16 performs special reproduction control on the video management unit 15.

  Next, the operation of the video transmission apparatus 10 configured as described above will be described in detail.

  FIG. 2 is a schematic diagram when three-dimensional reproduction is performed in the video transmission apparatus 10 according to the present embodiment.

  The control unit 16 performs reproduction control on the data storage unit 20 at time t1 shown in FIG. 2 according to the broadcast program. As a result, the right-eye compressed data is read from the data storage unit 20 and supplied to the first decoder 13. The first decoder 13 converts the read right-eye compressed data into a right-eye video signal S <b> 1 and outputs it to the video management unit 15. The video management unit 15 outputs the right-eye video signal S1 to the outside.

  Further, the control unit 16 performs three-dimensional reproduction control on the data storage unit 20 at time t2. Thereby, the compressed data for the left eye in addition to the compressed data for the right eye is read from the data storage unit 20 between the times t2 and t3. The left-eye compressed data is supplied to the second decoder 14 by the distribution unit 12 and converted into the left-eye video signal S2 by the second decoder 14. The video management unit 15 creates a 3D video signal from the playback unit for the right-eye video signal and the playback unit for the left-eye video signal during the period from time t2 'to time t3', and outputs the 3D video signal to the outside. Thereby, the video management unit 15 outputs the right-eye video signal S1 during the period from the time t1 to the time t2 ′, outputs the 3D video signal during the period from the time t2 ′ to the time t3 ′, and starts from the time t3 ′. During the period t4, the right-eye video signal S1 is output.

  Next, a conventional video transmission device for 2D broadcasting will be described. Similar to the video transmission device 10 shown in FIG. 1, the video transmission device for 2D broadcasting includes a reception unit, a distribution unit, a first decoder, a second decoder, a video management unit, and a control unit.

  When a compression method having a frame correlation is used for video compression, the first decoder decodes not only a reproduction unit that is desired to be reproduced but also an accompanying unit that is not desired to be reproduced. When a decoder that requires real time for decoding is used, the time required for decoding is longer than the time that is desired to be reproduced, so in a device that is required to continuously reproduce a plurality of materials such as a transmission server, A single decoder cannot keep up with playback. Therefore, the accompanying part is removed by performing the decoding process in parallel by the first and second decoders.

  That is, as shown in FIG. 3, the first decoder decodes the first compressed data and converts it into the first video signal S3. The second decoder decodes the second compressed data and converts it into a second video signal S4. An accompanying portion is included near the end of the first video signal S3 and near the start of the second video signal S4. The video management unit holds the first and second video signals S3 and S4 in the memory, and the accompanying unit near the end of the first video signal S3 overlaps with the reproduction unit of the second video signal S4. By switching between the first and second decoders, the accompanying portions included in the first and second video signals S3 and S4 are removed.

  The video management of the video transmission apparatus for 2D broadcasting performs special reproduction that the decoder is not good at such as pause and rewind reproduction of the decoded video signal.

  As described above, the video transmission device 10 according to the present embodiment has the same components as the video transmission device for 2D broadcasting, but the first decoder 13 decodes the compressed data for the right eye, and the second decoder 14 decodes the compressed data for the left eye, and the video management unit 15 creates a 3D video signal. The video transmission apparatus 10 according to the present embodiment is realized by installing a 3D video transmission program in the video transmission apparatus for 2D broadcasting and storing the compressed data for the right eye and the compressed data for the left eye in the data storage unit 20. Is possible. The 3D video transmission program outputs multiple data from the data storage unit 20, distributes the right-eye compressed data and the left-eye compressed data by the distribution unit 12, and the right-eye video signal and the left-eye video by the video management unit 15. Designed to create a 3D video signal based on the signal.

  The first and second decoders for switching the video signal in the video transmission device for 2D broadcasting and the video manager for special playback have high affinity for 3D broadcasting. Therefore, by diverting the components of the conventional video transmission device for 2D broadcasting, it is possible to realize a video transmission device for 3D broadcasting without adding special equipment. This makes it possible to significantly reduce equipment costs and labor costs compared to the introduction of new equipment, and eliminates the need to prepare a new installation location.

  Note that the switching function in units of frames that can be realized by the conventional video transmission device for 2D broadcasting is sacrificed. However, since switching between 2D and 3D requires attachment / detachment of 3D glasses and break-in of eyes, even if the switching function in units of frames is sacrificed, the value as a video transmission device is not impaired.

  In the above embodiment, a 3D video signal is created according to the 3D playback control from the control unit 16. Thereby, 3D broadcasting can be performed at an arbitrary position of 2D broadcasting.

  In the above embodiment, a 3D video signal is generated based on the right-eye video signal and the left-eye video signal obtained by decoding the right-eye compressed data and the left-eye compressed data stored in the data storage unit 20. This is different from the case where a 3D video signal is created in advance from the right-eye video signal and the left-eye video signal and stored in the data storage unit 20 in advance. That is, it is possible to freely switch between 3D broadcasting and 2D broadcasting. In addition, since the existing 3D video signal is not decomposed to create a 2D video signal, the image quality does not deteriorate in 2D broadcasting.

  Therefore, according to the video transmission device 10 according to the present embodiment, 3D broadcasting can be realized without introducing new equipment to the video transmission device for 2D broadcasting.

  In addition, although embodiment of this invention was described, this embodiment is shown as an example and is not intending limiting the range of invention. This embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. This embodiment and its modifications are included in the scope of the present invention and the gist thereof, and are also included in the invention described in the claims and the equivalent scope thereof.

DESCRIPTION OF SYMBOLS 10 ... Video transmission device 11 ... Reception part 12 ... Distribution part 13 ... 1st decoder 14 ... 2nd decoder 15 ... Management part 151 ... Processing part 152 ... Memory 16 ... Control part 20 ... Data storage part

Claims (5)

Receives compressed data for the right eye that compresses the video material for the right eye and compressed data for the left eye that compresses the video material for the left eye, and outputs the compressed data for the right eye and the compressed data for the left eye to different output destinations. A sorting section to perform,
A first decoder for decoding the right-eye compressed data from the allocating unit and creating a right-eye video signal;
A second decoder for decoding the left-eye compressed data from the allocating unit and creating a left-eye video signal;
A three-dimensional video signal based on the right-eye video signal and the left-eye video signal of the same frame held according to the three-dimensional reproduction control for holding the right-eye video signal and the left-eye video signal and performing three-dimensional broadcasting. A video management unit to create
A video transmission apparatus comprising: The allocating unit receives the compressed data for the right eye, and outputs the received compressed data for the right eye to the first decoder;
The video management unit holds the video signal for the right eye from the first decoder, and controls the video signal for the right eye to be held in accordance with special playback control for performing special playback including pause and rewind playback. The video transmission apparatus according to claim 1, wherein the special reproduction is performed. The allocating unit receives the left-eye compressed data, and outputs the received left-eye compressed data to the second decoder,
The video management unit holds the video signal for the left eye from the second decoder, and performs the special playback control for performing the special playback including pause and rewind playback with respect to the video signal for the left eye to be held. The video transmission apparatus according to claim 1, wherein the special reproduction is performed. A distribution unit that receives the first and second compressed data and outputs the first and second compressed data to different output destinations;
A first decoder that decodes the first compressed data to create a first video signal;
A second decoder that decodes the second compressed data to create a second video signal;
A three-dimensional video transmission program used in a video transmission device comprising a video management unit that switches and outputs the first and second video signals while holding the first and second video signals,
Causing the distribution unit to execute distribution processing for outputting right-eye compressed data obtained by compressing right-eye video material and left-eye compressed data obtained by compressing left-eye video material to different output destinations;
Decoding the right-eye compressed data from the allocating unit and causing the first decoder to execute a first decoding process for creating a right-eye video signal;
Decoding the left-eye compressed data from the allocating unit and causing the second decoder to execute a second decoding process for creating a left-eye video signal;
3D video signal based on right eye video signal and left eye video signal of the same frame held according to 3D playback control to hold the right eye video signal and left eye video signal and perform 3D broadcasting A 3D video transmission program causing the video management unit to execute a 3D video signal creation process for creating a video.   5. The three-dimensional video transmission program according to claim 4, wherein the program is a program for updating the video transmission device.

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