JP2007324807A - Reproducing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide "a video reproducing system" inhibiting the disturbance of a display image by changing over each TV system for a source device and a sink device. <P>SOLUTION: The source device 1 transmits the animation of a black screen by adding an SEC at a tail by a TV system before a changeover, and changes over its own TV system when the TV system is changed over. The source device 1 transmits the animation of the black screen by the TV system after the completion of the changeover, and starts the transmission of the animation of the video contents of the TV system after the changeover. The sink device 5 displays the received animation but maintains the display of the black screen being displayed immediately before a reception when the SEC is received. When the sink device 5 receives the animation of the TV system different from its own TV system, the sink device 5 changes over its own TV system, and is returned to an operation displaying the received animation. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a video playback system that plays back and outputs video content.

  As a video playback system for playing back and outputting video content, a system including a source device including a DVD drive for reading a DVD-Video disc, and one or a plurality of sink devices connected to the source device via a bus or a network. Is known (for example, Patent Document 1). In this system, the source device decodes the compression-encoded video data read from the DVD-Video disc via the DVD drive and performs re-compression encoding to the compression-encoded video data at a desired bit rate. Then, the video data subjected to recompression coding is distributed to each sink device. Then, each sink device decodes the compressed and encoded video data distributed from the source device, and outputs the decoded video.

The video playback system for playing back and outputting video content includes a DVD player and a monitor system for displaying the video played by the DVD player, and the PAL of the video to be played back from the DVD player to the monitor system via the LAN. There is also known a system that notifies a TV system such as NTSC and switches a TV system used for display output of video reproduced by a DVD player in a monitor system in accordance with a notification from the DVD player.
Special Table 2002-535197 JP 2001-359052 JP

In a video playback system that plays back and outputs video content, when switching the TV system of the video to be played back and output, a certain period before and after the switching of the TV system in order to make the display image disorder due to the switching of the TV system less noticeable It is desirable to display a black screen.
However, a video playback system is configured by a source device that performs decoding and recompression coding of compression-encoded video data as in Patent Document 1 and a sink device that decodes and outputs compression-encoded video data. In this case, it is necessary to switch the TV system of the sink device in addition to the switching of the TV system of the source device. Therefore, in such a video playback system, there is a case where the disturbance of the displayed image cannot be made inconspicuous simply by outputting a video representing a black screen for a certain period of time before and after the switching of the TV system at the source device. Can occur.

  Accordingly, the present invention provides a video playback system including a source device that distributes video and a sink device that displays the video distributed from the source device. The problem is to suppress disturbance.

  In order to achieve the above object, the present invention provides a video playback device that includes a source device and a sink device connected to the source device via a transmission line, and distributes moving images from the source device to the sink device. A moving image processing means for processing a moving image to be distributed to the sink device according to a set TV system, and a distributing means for distributing the moving image processed by the moving image processing means to the sink device via the transmission path; When the setting of the TV system of the moving image processing means is switched, the moving image of the TV system before switching, to which the entire display screen is black, with a predetermined code is distributed to the sink device via the distributing means After switching the TV system setting of the moving image processing means, and after switching the setting of the TV system, the entire display screen becomes black. A source TV system switching control unit that distributes a moving image to the sink device via the distribution unit and then starts distribution of the moving image processed by the moving image processing unit to the sink device via the distribution unit; , A display device on the sink device, and a moving image display processing means for processing a moving image distributed from the source device via the transmission line according to a set TV system and displaying the moving image on the display device, and the moving image A sink TV system switching control means for switching the setting of the TV system of the moving image display processing means to the TV system of the received moving image when a moving image different from the TV system set as the display processing means is received. is there. However, when the moving image with the code attached is distributed, the moving image display processing means displays the display on the display device so that the entire image included in the moving image is displayed in black. After the switching of the setting of the TV system is completed, it is maintained until the generation of the moving image of the TV system after the switching to be processed.

  According to such a video playback system, since the moving image processing means of the source device is changing the setting of the TV system, the moving image display of the sink device is started before the start of the period that can affect the display of the display device. The display screen of the TV system before switching by the source TV system switching control means of the source device until the end of the period that can affect the display of the display device that the processing means is changing the setting of the TV system Of moving image data with a predetermined code of a moving image in which the entire surface is black, display of the moving image represented by the distributed moving image data in the moving image display processing means of the sink device, and an image in which the entire surface included in the moving image is black By maintaining the display of the frame, the display of the display device is maintained to be a black screen display of the entire TV system before switching. In addition, the display on the display device immediately after displaying the entire black screen of the TV system before the switching is performed by displaying the moving image in which the entire display screen of the TV system after the switching is black by the source TV system switching control means of the source device. Due to the distribution of the moving image data and the display of the moving image represented by the distributed moving image data in the moving image display processing means of the sink device, the entire black screen of the TV system after switching is displayed. Therefore, the effect of the switching of the TV system on the display of the display device is that the display of the display device changes from the black display screen of the entire TV system before switching to the black display screen of the entire TV system after switching. It will be the only thing that arises. Therefore, according to the present video reproduction system, display disturbance due to the influence of the switching of the TV system of the source device and the sink device and the conspicuous disturbance are effectively suppressed.

  Note that in such a video playback system, when the moving image display processing means of the sink device distributes the moving image data with the code, the display of the display device is included in the moving image represented by the moving image data. The display may be corrected so as to maintain the display of the black image frame on the entire surface until the start of switching the setting of the TV system of the moving image display processing means.

  Even in this case, the fact that the moving image processing means of the source device is changing the setting of the TV system can maintain the display in the moving image display processing means of the sink device during a period that can affect the display of the display device. The display on the display device is maintained as a black image frame. In addition, the display on the display device before and after the setting of the TV system setting of the moving image display processing means of the sink device is also a black screen. Therefore, as compared with the case where such maintenance is not performed, it is possible to effectively suppress display disturbance due to the switching effect of the TV system of the source device and the sink device and the conspicuousness of the disturbance.

  The video playback system described above further includes an input buffer that temporarily stores video data distributed from the source device via the transmission path, and a buffer control unit in the sink device, and the video display processing means The video data is read from the input buffer and processed, and the buffer control unit predicts an overflow of the input buffer during switching of the TV system setting of the video display processing means. You may comprise so that the moving image data temporarily stored in the buffer may be discarded on a first-come-first-served basis.

  In each of the video playback systems described above, the moving image processing means of the source device decodes the compressed and encoded moving image data to be distributed to the sink device and recompresses and encodes the moving image data to a predetermined bit rate. The moving image display processing means of the sink device may decode the moving image from the compressed and encoded moving image data distributed from the source device, and display the decoded moving image data on the display device. . In this case, the source device is provided with a drive device that accesses the attached DVD-Video disc, and compressed and encoded video data to be distributed to the sink device is attached to the drive device. Video data recorded on a DVD-Video disc may be used.

  As described above, according to the present invention, in a video playback system including a source device that distributes video and a sink device that displays the video distributed from the source device, the TV system of each of the source device and the sink device Disturbances in the display image due to switching can be suppressed.

Hereinafter, a video playback system according to an embodiment of the present invention will be described.
FIG. 1 shows a configuration of a video playback system according to the present embodiment.
As shown in the figure, the video playback system includes a source device 1 to which a drive device 3 for accessing a mounted DVD-Video disc 2 is connected, a bus 4 to which the source device 1 is connected, and a 1 connected to the bus 4 or 1 And a plurality of sink devices 5.
The source device 1 includes a PS separation unit 11, a transcoder 12, a transcoder output buffer 13, a PS multiplexing unit 14, a source side bus interface 15, and a source control unit 16.
The sink device 5 includes a sink-side bus interface 51, a sink-side PS separation unit 52, an input buffer 53, a moving picture decoder 54, an output buffer 55, a display control unit 56, a display device 57, an audio decoder 58, an amplifier unit 59, a speaker. 60.
Hereinafter, a basic operation of reproduction output of the DVD-Video disc 2 performed in such a video reproduction system will be described.
First, in the source device 1, the PS separation unit 11 is an MPEG in which a video stream, a sub-picture stream, an audio stream, and other control information read out from the DVD-Video disc 2 via the drive device 3 are packet-multiplexed. -2 Separate each stream from PS (Program Stream) of the system. Under the control of the source control unit 16, the transcoder 12 decodes the moving image to be displayed and output on the display device 57 based on the moving image stream, the sub-picture stream, and the control information separated by the PS separation unit 11. The moving image is recompressed and encoded into a moving image stream of a desired bit rate, and the recompressed and encoded moving image stream is stored in the transcoder output buffer 13. Then, the PS multiplexing unit 14 sequentially reads the moving picture stream stored in the transcoder output buffer 13, reconstructs the PS multiplexed with the audio stream separated by the PS separation unit 11, and passes through the source side bus interface 15. To each sink device 5.

  On the other hand, in the sink device 5, the PS distributed from the source device 1 by the sink-side bus interface 51 is separated into a video stream and an audio stream by the sink-side PS separation unit 52, and the separated video stream is input to the input buffer 53. The stored and separated audio stream is output to the audio decoder 58. The moving picture decoder 54 sequentially reads out the moving picture stream from the input buffer 53, stores the image data representing each image frame constituting the moving picture obtained by decoding the moving picture stream in the output buffer 55, and is stored in the output buffer 55. The decoded moving image is displayed on the display device 57 by sequentially outputting the image data of each image frame to the display control unit 56. On the other hand, the audio decoder 58 decodes the audio stream input from the sink-side PS separation unit 52 and sequentially outputs the decoded audio data to the amplifier unit 59, thereby outputting the audio represented by the audio data to the speaker 60.

Hereinafter, a TV system switching operation in such a video reproduction system will be described. The TV system refers to a standard for the frame period and the number of pixels of moving images, such as PAL and NTSC.
Here, the switching of the TV system in the video playback system is processed by a playback start control process performed by the source control unit 16 of the source device 1 and a playback output process performed by the moving picture decoder 54 of the sink device 5. Here, the playback start control process performed in the source control unit 16 of the source device 1 is a process performed when playback of a new DVD-Video disc 2 is started, and the playback output process performed in the video decoder 54 of the sink device 5 is performed in sync. This is a process for reproducing and outputting a moving image or sound as described above in the apparatus 5.

First, the reproduction start control process performed in the source control unit 16 of the source device 1 will be described.
FIG. 2a shows the procedure of this reproduction start control process.
As shown in the figure, in this process, the source control unit 16 first monitors the generation of a new playback target DVD-Video disc 2 (step 202). Here, for example, when the source device 1 is activated in a state where the DVD-Video disc 2 is mounted on the drive device 3, the DVD-Video disc 2 is inserted in the drive device 3 while the source device 1 is operating. When the drive device 3 is mounted, the drive device 3 notifies the source control unit 16 of the occurrence of a new playback target DVD-Video disc 2, and the source control unit 16 based on the notification notifies the new playback target DVD-Video disc 2. The occurrence of the Video disc 2 is detected.

  Now, in the playback start control process, if a new playback target DVD-Video disc 2 is generated (step 202), the source control unit 16 changes the DVD-Video disc 2 from the DVD-Video disc 2 via the drive device 3. 2 is read, and the TV system to which the video content recorded on the DVD-Video disc 2 corresponds is identified (step 204).

  Then, it is determined whether or not the video content recorded on the DVD-Video disc 2 is compatible with the TV system currently set in the transcoder 12 (step 206). As it is, the drive device 3 is controlled to start playback of the video content recorded on the DVD-Video disc 2, that is, read PS of the video content and supply it to the PS separation unit 11 (step 214). The process returns to step 202 and waits for the generation of the next new reproduction target DVD-Video disc 2.

  On the other hand, if the video content recorded on the DVD-Video disc 2 does not correspond to the TV system currently set in the transcoder 12 (step 206), first, the transcoder 12 is connected to the transcoder 12 concerned. In step 208, the TV system currently set generates a short-time moving picture stream of a black screen in which the entire display screen is black and stores it in the transcoder output buffer 13 (step 208). At this time, the transcoder 12 is made to add a predetermined SEC (Sequence End Code) to the tail position of the short-time moving picture stream on the black screen. Here, in step 208, the moving image represented by the short-time moving image stream of the black screen generated by the transcoder 12 is actually formed from only one image frame whose entire display screen is black. Also good.

  When the transcoder 12 completes the generation of the short-time black screen video stream and the storage in the transcoder output buffer 13, the TV system set in the transcoder 12 is recorded on the DVD-Video disc 2. A process of changing to a TV system compatible with the current video content is performed (step 210). Since the moving picture stream is not stored in the transcoder output buffer 13 from the transcoder 12 during the period in which the TV system is changed, the transcoder output buffer 13 is changed when a long time is required for changing the TV system. It can happen that it is empty. Then, during a period in which there is no moving image stream stored in the transcoder output buffer 13, the PS multiplexing unit 14 performs an operation of multiplexing a random dummy moving image stream into the PS.

  Then, when the change of the TV system is completed, the entire display screen of the TV system currently set in the transcoder 12, that is, the TV system after the change in step 210 becomes black in the transcoder 12. Generation of a moving picture stream having a predetermined length of time on a black screen is stored in the transcoder output buffer 13 (step 212).

  Finally, the drive device 3 is controlled to start playback of the video content recorded on the DVD-Video disc 2, that is, read PS of the video content and supply it to the PS separation unit 11 (step) 214) The process returns to step 202 and waits for the generation of the next new reproduction target DVD-Video disc 2.

The playback start control process performed in the transcoder 12 of the source device 1 has been described above.
When the source device 1 is activated, the source control unit 16 thereafter performs the transcoder 12 until generation of a new reproduction target DVD-Video disc 2 is detected in step 202 of the above reproduction start control process. In addition, a process for generating a moving image stream representing a predetermined initial screen and storing it in the transcoder output buffer 13 by the set TV system is also performed. Similarly, when a state in which the DVD-Video disc 2 is not loaded in the drive device 3 occurs while the source device 1 is in operation, similarly, in step 202 of the above-described playback start control process, Until the generation of a DVD-Video disc 2 to be reproduced is detected, the transcoder 12 generates a video stream representing a predetermined initial screen and stores it in the transcoder output buffer 13 by the set TV system. Process.

Next, playback output processing performed in the moving picture decoder 54 of the sink device 5 will be described.
FIG. 2b shows the procedure of this reproduction output process.
As shown in the figure, in the reproduction output process, first, the moving image stream stored in the input buffer 53 is sequentially read and decoded, and image data representing each image frame constituting the moving image obtained by decoding the moving image stream is output to the output buffer 55. The image data of each image frame stored in the output buffer 55 is sequentially read and output to the display control unit 56 for display on the display device 57 (step 252).

  Then, the above-mentioned SEC appears in the video stream read from the input buffer 53 (step 254). If SEC appears, the video stream stored in the input buffer 53 is read and read. The decoding of the moving image stream and storage in the output buffer 55 are stopped. In addition, the image data representing the image frame decoded last from the data portion before the SEC of the moving image stream and stored in the output buffer 55 is repeatedly read from the output buffer 55 and output to the display control unit 56, thereby displaying the display device. The process of maintaining the display of 57 in the display of the image frame decoded last from the data portion before the SEC is started (step 256).

Next, the change of the TV system of the video stream separated by the sink-side PS separator 52 to a TV system different from the TV system currently set in the video decoder 54 is output to the sink-side PS separator 52. Based on the monitoring (step 258).
Here, the identification of the TV system of the video stream separated by the sink-side PS separation unit 52 in the video decoder 54 is performed, for example, when the transcoder 12 of the source device 1 starts generating the video stream after the TV system is changed. The identification information of the TV system of the video stream is added to the head of the video stream to be generated, and the video system of the video stream separated by the sink-side PS separation unit 52 from the identification information in the video decoder 54 of the sink device 5 This can be done by detecting the above.

  If the TV system of the video stream separated by the sink-side PS separator 52 changes to a TV system different from the TV system currently set in the video decoder 54 (step 258), the input buffer 53 The stored video stream data of the TV system currently set in the video decoder 54 is discarded (step 260). In addition, the moving picture decoder 54 performs a process of changing the TV system set in itself to the TV system of the moving picture stream that is detected to be different from the TV system currently set in step 258 (step 262). Further, during the TV system change processing period, the video decoder 54 monitors the overflow of the input buffer 53, and if the occurrence of the overflow is predicted, the video stream stored in the input buffer 53 is detected. Are also discarded in the order of arrival. Note that this discarding is performed in units of GOP when the moving image stream distributed from the source device 1 to the sink device 5 is a stream of moving image data compressed and encoded by the MPEG method. Note that the GOP discarded here is a GOP of a moving picture stream of a black screen that the transcoder 12 of the source device 1 starts generating in response to an instruction from the source control unit 16 in step 212 of the reproduction start control process. . Therefore, the transcoder 12 of the source device 1 is a video stream of only the I picture so that the playback time corresponding to each GOP that is discarded in this way is minimized. Each GOP may be generated as a moving image stream formed by a single I picture.

  When the change of the TV system of the video decoder 54 is completed, the video stream stored in the input buffer 53 waits for a predetermined amount of data or more (step 264), and is stored in the input buffer 53. If the video stream exceeds a predetermined amount of data, the process returns to step 252 to sequentially read out and decode the video stream stored in the input buffer 53, and each image frame constituting the video obtained by decoding the video stream is decoded. The image data to be represented is stored in the output buffer 55, and the image data of each image frame stored in the output buffer 55 is sequentially read and output to the display control unit 56 for display on the display device 57 is resumed. To do.

The reproduction output process performed in the moving picture decoder 54 of the sink device 5 has been described above.
Here, FIG. 3 shows an operation example of TV system switching by the above-described playback start control process and playback output process.
As shown in the figure, when the TV system # 1 is set in both the transcoder 12 of the source device 1 and the moving picture decoder 54 of the sink device 5, the initial state (DVD-Video to be played immediately after starting the source device 1 or to be played back). In the state where the disk 2 does not exist), as shown in a2, the transcoder 12 of the source device 1 is in a state of outputting a video stream representing a predetermined initial screen of the TV system # 1 (S21), and in b1 As shown, the video decoder 54 of the sink device 5 is in a state where it decodes and outputs the video stream of the TV system # 1 received from the source device 1 (S31).

  Therefore, in this initial state, a predetermined initial screen of the TV system # 1 is transmitted from the source device 1 to the sink device 5. Also, as shown in b2, a predetermined initial screen of the TV system # 1 is decoded and output from the moving picture decoder 54 in the sink device 5 (S41) and displayed on the display device 57 of the sink device 5.

  Next, when a new DVD-Video disc 2 to be played is generated in this state (S1), the source control unit 16 of the source device 1 causes the video of the DVD-Video disc 2 to be displayed as indicated by a1. The content TV system is identified (S11). When the identified TV system is a TV system # 2 different from the TV system # 1 currently set in the transcoder 12, the source control unit 16 adds a short black screen with SEC added to the tail. Is output to the transcoder 12 (S12), and in response to the instruction, the transcoder 12 outputs the video stream with SEC added to the tail of the short black screen of the TV system # 1 as shown in a2. Generate and output (S22). Then, as indicated by a1, when the transcoder 12 completes the output of the black screen video stream, the source control unit 16 instructs the transcoder 12 to switch the TV system to the TV system # 2 (S13). In response to the instruction, the transcoder 12 stops the output of the moving picture stream and switches its TV system to the TV system # 2 as indicated by a2 (S23). Note that during the TV system switching process of the transcoder 12, a moving image stream of a dummy moving image may be transmitted from the source device 1 to the sink device 5 as described above.

  When the switching of the TV system of the transcoder 12 is completed, as indicated by a1, the source control unit 16 instructs the transcoder 12 to output a video stream of a black screen having a predetermined time length (S14). In response to the instruction, the transcoder 12 generates and outputs a black screen moving image stream of a predetermined time length of the TV system # 2 as indicated by a2 (S24). When the transcoder 12 completes the output of the black screen video stream, the source control unit 16 starts reading the PS of the video content of the DVD-Video disc 2 by starting the DVD-, as indicated by a1. Playback of video content on the Video disc 2 is started (S15), and the transcoder 12 displays a video content playback screen from the PS of the video content read from the DVD-Video disc 2 as indicated by a2. The moving picture stream of the TV system # 2 obtained by decoding the moving picture of # 2 and re-compressing the decoded moving picture is output (S25).

  As a result, the video stream transmitted from the source device 1 and received by the sink device 5 following the video stream of the initial screen of the TV system # 1 in the initial state is a black with SEC added to the tail of the TV system # 1. The video stream of the screen (-the video stream of the dummy video) -the video stream of the black screen of the TV system # 2-the video stream of the playback screen of the video content of the DVD-Video disc 2 of the TV system # 2 changes.

  Now, in the sink device 5, the video decoder 54 that has output the initial screen of the TV system # 1 in the initial state as described above, the video stream to which the SEC (S221) is added as shown in b1. Since the video stream of the TV system # 1 received from the source device 1 is decoded and output (S31) until the video is decoded and output (S31), the video decoder 54 of the sink device 5 Subsequent to the initial screen (S41) of system # 1, the black screen (S42) of TV system # 1 is output. Further, as shown in b1, the moving picture decoder 54 of the sink device 5 is in a state of maintaining the output of the immediately preceding output screen after decoding and outputting the moving picture stream to which SEC (S221) is added at the tail ( S32). Therefore, as shown in b2, the output of the black screen (S42) of the TV system # 1 from the video decoder 54 of the sink device 5 is continued even after the decoding and output of the video stream of the black screen is completed. It will be.

  Next, as shown in b1, the video decoder 54 of the sink device 5 receives its own TV system when the sink device 5 receives a black screen video stream of a TV system # 2 different from its current TV system. Switch to TV system # 2 (S321), and when the switching is completed and a predetermined amount of video stream of TV system # 2 is stored in the input buffer 53, it is received from the source device 1. A transition is made to a state (S33) in which the video stream of the TV system # 2 is decoded and output. As a result, as shown in b2, the output of the video decoder 54 is output from the black screen (S42) of the TV system # 1 to the output of the black screen (S43) of the TV system # 2-the video stream of the TV system # 2. The video content playback screen (S44) of the DVD-Video disc 2 represented by

  As a result, the display of the sink device 5 is the initial screen of the TV system # 1, the black screen of the TV system # 1, the black screen of the TV system # 2, the playback screen of the video content of the DVD-Video disc 2 of the TV system # 2. It will be switched sequentially. Therefore, the influence of the switching of the TV system occurs only at the display switching position from the black screen of the TV system # 1 to the black screen of the TV system # 2. Since the switching time is short and the black screen is displayed before and after the switching time, the display disturbance due to the switching effect of the TV system is sufficiently suppressed.

The embodiment of the present invention has been described above.
In the above embodiment, the sink device 5 outputs the black screen with SEC added at the end, and the video decoder 54 completes the switching of the TV system and decodes and outputs the video stream of the TV system after the switching. If the sink device 5 is configured so that such maintenance cannot be performed during switching of the TV system of the video decoder 54, the black screen with the SEC added at the end is maintained. The output may be maintained only until the switching of the TV system of the moving picture decoder 54 is started. Even in this case, the disturbance of the display screen due to the change of the TV system of the transcoder 12 of the source device 1 can be masked by maintaining the black screen, so that the case where such maintenance is not performed is compared. Disturbance of display due to the influence of switching of the TV system can be suppressed to a small extent.

  In the above embodiment, the application to the video playback system in which the video content recorded on the DVD-Video disc 2 is read and distributed from the source device 1 to the sink device 5 has been described. However, the TV system according to this embodiment is described. The switching technique is an arbitrary video that handles video content of a plurality of types of TV systems, such as a video playback system in which the source device 1 has a TV receiver and the video content received by the receiver is distributed from the source device 1 to the sink device 5. The same applies to the playback system.

It is a block diagram which shows the structure of the video reproduction system which concerns on embodiment of this invention. It is a flowchart which shows the reproduction | regeneration start control process and reproduction | regeneration output process which are performed in the video reproduction system which concerns on embodiment of this invention. It is a figure which shows the operation example of the video reproduction system which concerns on embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Source device, 2 ... DVD-Video disk, 3 ... Drive device, 4 ... Bus, 5 ... Sink device, 11 ... PS separation part, 12 ... Transcoder, 13 ... Transcoder output buffer, 14 ... PS multiplexing part 15 ... Source side bus interface, 16 ... Source control unit, 51 ... Sink side bus interface, 52 ... Sink side PS separation unit, 53 ... Input buffer, 54 ... Video decoder, 55 ... Output buffer, 56 ... Display control unit, 57 ... Display device, 58 ... Audio decoder, 59 ... Amplifier unit, 60 ... Speaker.

Claims (5)

A video playback device that has a source device and a sink device connected to the source device via a transmission line, and distributes a moving image from the source device to the sink device,
The source device is
Video processing means for processing video data representing a video to be distributed to the sink device according to a set TV system;
Distribution means for distributing moving image data to the sink device via the transmission path;
When the setting of the TV system of the moving image processing means is switched, the sink device sends the moving image data with a predetermined code representing the moving image in which the entire display screen of the TV system before switching is black through the distributing means. And switching the setting of the TV system of the moving image processing means, and after switching the setting of the TV system, distributing the moving image data representing the moving image in which the entire display screen of the TV system after switching is black Source TV system switching control means for starting delivery to the sink device via the delivery means, and then delivering the video data processed by the video processing means to the sink device via the means,
The sink device is
A display device;
Moving image display processing means for processing the moving image data distributed from the source device via the transmission line according to a set TV system and displaying the moving image represented by the moving image data on the display device;
A sink TV system switching control means for switching the setting of the TV system of the moving image display processing means to the TV system of the received moving image when receiving moving image data of a moving image different from the TV system set in the moving image display processing means; Have
When the moving image data with the code attached is distributed, the moving image display processing means displays the display on the display device with the entire image included in the moving image represented by the moving image data being displayed as a black image frame. A video reproduction system characterized in that after the switching of the setting of the TV system of the display processing means is completed, the generation of moving image data of the moving image of the TV system after the switching to be processed is maintained. A video playback device that has a source device and a sink device connected to the source device via a transmission line, and distributes a moving image from the source device to the sink device,
The source device is
Video processing means for processing video data representing a video to be distributed to the sink device according to a set TV system;
Distribution means for distributing moving image data to the sink device via the transmission path;
When the setting of the TV system of the moving image processing means is switched, the sink device sends the moving image data with a predetermined code representing the moving image in which the entire display screen of the TV system before switching is black through the distributing means. And switching the setting of the TV system of the moving image processing means, and after switching the setting of the TV system, distributing the moving image data representing the moving image in which the entire display screen of the TV system after switching is black Source TV system switching control means for starting delivery to the sink device via the delivery means, and then delivering the video data processed by the video processing means to the sink device via the means,
The sink device is
A display device;
Moving image display processing means for processing the moving image data distributed from the source device via the transmission line according to a set TV system and displaying the moving image represented by the moving image data on the display device;
A sink TV system switching control means for switching the setting of the TV system of the moving image display processing means to the TV system of the received moving image when receiving moving image data of a moving image different from the TV system set in the moving image display processing means; Have
When the moving image data with the code attached is distributed, the moving image display processing means displays the display on the display device with the entire image included in the moving image represented by the moving image data being displayed as a black image frame. A video reproduction system characterized in that the display processing means is maintained until the setting of the TV system is switched. The video playback system according to claim 1 or 2, wherein
The sink device is
An input buffer for temporarily storing moving image data distributed from the source device via the transmission line;
A buffer control unit,
The moving image display processing means reads and processes the moving image data from the input buffer,
The buffer control unit discards the video data temporarily stored in the input buffer on a first-come-first-served basis when an overflow of the input buffer is predicted during the switching of the TV system setting of the video display processing means. Feature video playback system. The video playback system according to claim 1, 2, or 3,
The moving image processing means of the source device decodes the compressed and encoded moving image data to be distributed to the sink device, and performs a process of recompressing and encoding the moving image data to a predetermined bit rate.
The video playback system, wherein the moving image display processing means of the sink device decodes a moving image from the compressed and encoded moving image data distributed from the source device and displays the decoded moving image data on the display device. The video playback system according to claim 4, wherein
The source device has a drive device for accessing the loaded DVD-Video disc,
A video reproduction system, wherein the compression-coded moving image data to be distributed to the sink device is moving image data recorded on a DVD-Video disc attached to the drive device.