JP5335224B2 - HDMI transmission / reception system - Google Patents

Description

  The present invention relates to an HDMI transmission / reception device, and more particularly to an HDMI transmission / reception device that outputs recorded video and audio.

  In an audio processing circuit such as a television receiver having an HDMI (High-Definition Multimedia Interface) terminal, a signal on which audio control information of the HDMI standard is superimposed together with the audio signal is received from the transmitter having the HDMI terminal and received. There is one that controls volume adjustment for each transmission device connected to the reception device based on the voice control signal information (see, for example, Patent Document 1).

  In recent years, video equipment has become widespread, and digital broadcast television receivers receive programs classified into many genres such as movies, sports, dramas, and animations, and image quality suitable for each classified genre. The sound quality can be output.

  In order to obtain an image quality suitable for each genre of a program, there is a program in which a recorded program is corrected for each genre and displayed on a screen (for example, see Patent Document 2).

JP 2006-352599 A JP 2005-102186 A

  In Patent Document 1, audio signals are controlled for each transmission device connected to a receiving device, and not audio signal control suitable for each genre of a program but video signal control is also performed. Absent.

  In Patent Document 2, the transmission apparatus side corrects an image suitable for each genre, and then transmits the image to a display apparatus that is a reception apparatus. Moreover, it does not describe about the sound correction. Here, even if the correction is performed on the receiving device side, from an HDMI transmitting device having an HDMI terminal such as a DVD (Digital Versatile Disk) recording / playback device or an HDD (Hard Disk Drive) recording / playback device to a television receiver, etc. In the case of video and audio transmitted to the HDMI receiving device, it cannot be performed because there is no information similar to the type of genre received by the television receiver.

  The present invention has been made to solve these problems, and it is an object of the present invention to automatically perform video and audio correction suitable for the contents of a program on the receiving apparatus side.

In order to solve the above problems, an HDMI transmission / reception system according to the present invention is an HDMI transmission / reception system in which an HDMI transmission device and an HDMI reception device are connected by an HDMI cable, and the HDMI transmission device indicates the importance of a program. Importance level detection unit for detecting importance level metadata information, information addition unit for adding importance level metadata information detected by the importance level detection unit to the program, and importance level at the information addition unit a recording drive for recording a program in the metadata information is added, and the additional information extracting unit which importance level metadata information reproduced from the recording drive to extract the importance level metadata information from the added programs, importance and a first control circuit for converting a data format capable of transmitting level metadata information by HDMI, HDM Receiving apparatus is converted by a first control circuit, and a second control circuit for converting the importance level metadata information based on the importance level metadata information transmitted by the HDMI cable, the importance level metadata information It includes a video correction circuit for correcting the video signal transmitted from the HDMI transmitting unit, and an audio correction circuit for correcting a sound signal transmitted from the HDMI transmitting unit based on the importance level metadata information based on the video correction Circuit correction includes correction that increases the zoom of the video, increases the brightness of the video, or increases the contrast of the video when the importance level of the metadata information is high. The correction of the audio correction circuit is important When the degree level is high, it includes a correction for increasing the sound .

According to the present invention, the importance level detector detects the severity level metadata information indicating the importance of the program, information adding unit severity level metadata information detected by the importance level detector in the program The recording drive records the program with the importance level metadata information added by the information adding unit, and the video correction circuit corrects the video signal transmitted from the HDMI transmission device based on the importance level metadata information. The audio correction circuit corrects the audio signal transmitted from the HDMI transmission device based on the importance level metadata information, and the correction of the video correction circuit is performed when the importance level of the importance level metadata information is high. Includes corrections to zoom the video, increase the video brightness, or increase the video contrast. In case have, to include a correction for increasing the sound, it is possible to automatically perform the image and sound of the correction suitable for the content of the program at the receiver side.

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

<Embodiment 1>
FIG. 1 is a block diagram showing a configuration of an HDMI transmitting / receiving apparatus according to Embodiment 1 of the present invention. The HDMI transmission / reception apparatus includes a DVD recorder 100 (HDMI transmission unit) and a monitor 200 (HDMI reception unit), which are connected by an HDMI cable 102. The HDMI cable 102 is connected to the HDMI terminal 101 of the DVD recorder 100 and the HDMI terminal 102 of the monitor 200.

  As described in Patent Document 1, a signal transmitted through the HDMI 102 includes TMDS (Transition Minimized Differential Signaling), DDC (Display Data Channel), and CEC (Consumer Electronics Control) signal lines. In TMDS, a video signal, an audio signal, a control signal (auxiliary data), and a video signal clock are transmitted by differential signals. In the DDC, information such as each configuration and state is exchanged between the DVD recorder 100 and the monitor 200. In CEC, advanced control functions can be realized, and information unique to the product vendor can be transmitted between the DVD recorder 100 and the monitor 200 to both sides.

As shown in FIG. 1, a DVD recorder 100 includes an antenna 1, a broadcast tuner 2, a recording drive 3, a decoding circuit 4, an HDMI transmission unit 5, a program information analysis unit 6 (information analysis unit), an information addition unit 7, and additional information. extraction unit 8, the control circuit 9 that consists.

  First, the operation at the time of program recording in the DVD recorder 100 will be described.

  When a user performs an operation for recording through a user interface (not shown), the broadcast tuner 2 converts a program of a desired channel from a radio wave input from the antenna 1 into a TS (Transport Stream) that is partialized. Demodulate. The demodulated TS is input to the program information analysis unit 6 and the information addition unit 7. The program information analysis unit 6 detects the genre information (classification information) of the program described in the program table information (Electronic Program Guide: EPEG) superimposed on the TS, and transmits the detection result to the information addition unit 7. . The information adding unit 7 adds the genre information input from the program information analyzing unit 6 to the TS input from the broadcast tuner 2. The TS to which the genre information is added by the information adding unit 7 is recorded in the recording drive 3. The genre information includes, for example, movies, music, variety, sports and the like.

  Next, the operation when the recorded program is reproduced from the recording drive 3 will be described.

  When the user performs an operation for reproducing a desired program from the recording drive 3 via the user interface, the TS of the selected program is read from the recording drive 3 and sent to the decoding circuit 4 and the additional information extracting unit 8. Entered. In the decoding circuit 4, the TS of the input program is decoded into video data 11 and audio data 12. The decoded video data 11 and audio data 12 are input to the HDMI transmission unit 5. On the other hand, the additional information extraction unit 8 extracts genre information added to the TS of the input program. The genre information extracted by the additional information extraction unit 8 is input to the control circuit 9. The control circuit 9 converts the input genre information into a data format that can be transmitted through the CEC line of the HDMI cable 102, and outputs it to the HDMI transmission unit 5.

  In the HDMI transmission unit 5, on the signal line of the HDMI cable 102, video data and audio data are output to the monitor 200 via TMDS, and genre information data is output to the monitor 200 via CEC.

  The genre information may be transmitted through a signal line other than CEC. Also, Vendor Specific Commands are used for CEC transmission (see High-Definition Multimedia Interface Specification Version 1.3, CEC 13).

Next, the operation in the monitor 200 will be described. An arbitrary program is reproduced from the DVD recorder 100 connected by the HDMI cable 102, and video data 11, audio data 12, and genre information are input to the monitor 200 via the HDMI cable 102. The video data 31 input to the HDMI receiving unit 21 is output to the video correction circuit 22, and the audio data 32 input to the HDMI receiving unit 21 is output to the audio correction circuit 23. Genre information input to the HDMI receiving unit 21 via the CEC is output to the control circuit 2 4 genre information data 33. The control circuit 24 optimizes the setting values of the video parameter and the audio parameter according to the genre information obtained from the genre information data 33. Video parameters include brightness, contrast, hue, and gamma correction, and audio parameters include volume.

  These parameters are recorded in advance in the control circuit 24, and the setting values of each parameter are read and changed based on the genre information obtained from the DVD recorder 100. The changed video parameter 35 is output to the video correction circuit 22, and the changed audio parameter 34 is input to the audio correction circuit 23. In the video correction circuit 22, the video data 31 is corrected based on the input video parameter 35, and the corrected video data is input to the display unit 25 and displayed on a screen (not shown). In the sound correction circuit 23, the sound data 32 is corrected based on the input sound parameter 34, and the corrected sound data is input to the sound output unit 26, converted into an actual sound and output.

  From the above, the DVD recorder 100 also records genre information at the time of recording a program, transmits the genre information to the monitor 200 at the time of program playback, and the monitor 200 transmits video and audio corresponding to the genre of the program. Correct automatically. Therefore, the user is automatically changed so as to obtain an image quality and a sound volume suitable for the program contents without performing complicated operations. For example, a movie has many dark scenes and a low volume. Therefore, if the brightness is increased and the volume is increased, the movie can be automatically changed so that the user can easily watch it.

<Embodiment 2>
FIG. 2 is a block diagram showing a configuration of an HDMI transmitting / receiving apparatus according to Embodiment 2 of the present invention. As shown in FIG. 2, the DVD recorder 100 includes a decoding circuit 13 and a CM determination filter 14 (CM determination unit). Since other configurations are the same as those in the first embodiment, description thereof is omitted.

  First, the operation at the time of program recording in the DVD recorder 100 will be described.

  When a user performs an operation for recording through a user interface (not shown), the broadcast tuner 2 converts a program of a desired channel from a radio wave input from the antenna 1 into a TS (Transport Stream) that is partialized. Demodulate. The demodulated TS is input to the decoding circuit 13 and the information adding unit 7. The video decoded by the decoding circuit 13 is input to the CM determination filter 14. The CM determination filter 14 detects information on the switching point of the CM portion and outputs the information to the information adding unit 7 as CM switching information. The information adding unit 7 adds the CM switching information input from the CM determination filter 14 to the TS input from the broadcast tuner 2. The TS to which the CM switching information is added by the information adding unit 7 is recorded in the recording drive 3.

  Next, the operation when the recorded program is reproduced from the recording drive 3 will be described.

When the user performs an operation for reproducing a desired program from the recording drive 3 via the user interface, the TS of the selected program is read from the recording drive 3 and sent to the decoding circuit 4 and the additional information extracting unit 8. Entered. In the decoding circuit 4, the TS of the input program is decoded into video data 11 and audio data 12. The decoded video data 11 and audio data 12 are input to the HDMI transmission unit 5. On the other hand, the additional information extraction unit 8 extracts CM switching information added to the TS of the input program. The CM switching information extracted by the additional information extraction unit 8 is input to the control circuit 9 . The control circuit 9 converts the input CM switching information into a data format that can be transmitted through the CEC line of the HDMI cable 102, and outputs the data format to the HDMI transmission unit 5.

  In the HDMI transmission unit 5, on the signal line of the HDMI cable 102, video data and audio data are output to the monitor 200 via TMDS, and CM switching information data is output to the monitor 200 via CEC.

  Note that the CM switching information may be transmitted through a signal line other than CEC. Also, Vendor Specific Commands are used for CEC transmission (see High-Definition Multimedia Interface Specification Version 1.3, CEC 13).

Next, the operation in the monitor 200 will be described. An arbitrary program is reproduced from the DVD recorder 100 connected by the HDMI cable 102, and video data 11, audio data 12, and CM switching information are input to the monitor 200 via the HDMI cable 102. The video data 31 input to the HDMI receiving unit 21 is output to the video correction circuit 22, and the audio data 32 input to the HDMI receiving unit 21 is output to the audio correction circuit 23. CM switching instead information input to the HDMI receiving unit 21 via the CEC is output to the control circuit 2 4 as CM switching instead information data 36. The control circuit 24 optimizes the setting values of the video parameter and the audio parameter according to the CM switching information obtained from the CM switching information data 36. Video parameters include brightness, contrast, hue, and gamma correction, and audio parameters include volume.

  These parameters are recorded in advance in the control circuit 24, and the setting values of the respective parameters are read and changed based on the CM switching information obtained from the DVD recorder 100. The changed video parameter 35 is output to the video correction circuit 22, and the changed audio parameter 34 is input to the audio correction circuit 23. In the video correction circuit 22, the video data 31 is corrected based on the input video parameter 35, and the corrected video data is input to the display unit 25 and displayed on a screen (not shown). In the sound correction circuit 23, the sound data 32 is corrected based on the input sound parameter 34, and the corrected sound data is input to the sound output unit 26, converted into an actual sound and output.

  From the above, the DVD recorder 100 also records CM switching information at the time of program recording, transmits CM switching information to the monitor 200 at the time of program playback, and uses the monitor 200 as a CM switching point. The corresponding video and audio are automatically corrected. Therefore, it is automatically changed so that the image quality and sound volume are suitable for the CM part without complicated operations by the user. For example, the CM portion can be automatically changed so that the user can easily view it by setting the sound volume such as the brightness and contrast of the video to a low level so as not to be affected by the program scene.

<Embodiment 3>
FIG. 3 is a block diagram showing a configuration of the HDMI transmitting / receiving apparatus according to the third embodiment of the present invention. As shown in FIG. 3, the DVD recorder 100 includes a decryption circuit 13, an importance level detection unit 15, a metadata addition unit 16, and a metadata extraction unit 17, and other configurations are described in the first embodiment and the first embodiment. Since it is the same as 2, the description is omitted.

  First, the operation at the time of program recording in the DVD recorder 100 will be described.

  When a user performs an operation for recording through a user interface (not shown), the broadcast tuner 2 converts a program of a desired channel from a radio wave input from the antenna 1 into a TS (Transport Stream) that is partialized. Demodulate. The demodulated TS is input to the decoding circuit 13 and the metadata adding unit 16. The video decoded by the decoding circuit 13 is input to the importance level detection unit 15. The importance level detection unit 15 detects the importance level metadata information and outputs the importance level metadata information to the metadata adding unit 16 as importance level metadata information. The metadata adding unit 16 adds importance level metadata information input from the importance level detecting unit 15 to the TS input from the broadcast tuner 2. The TS to which the importance level metadata information is added by the metadata adding unit 16 is recorded in the recording drive 3.

  Next, the operation when the recorded program is reproduced from the recording drive 3 will be described.

When an operation to reproduce a desired program from the recording drive 3 is performed by the user via the user interface, the TS of the selected program is read from the recording drive 3 and sent to the decoding circuit 4 and the metadata extraction unit 17. Entered. In the decoding circuit 4, the TS of the input program is decoded into video data 11 and audio data 12. The decoded video data 11 and audio data 12 are input to the HDMI transmission unit 5. On the other hand, the metadata extraction unit 17 extracts importance level metadata information added to the TS of the input program. The importance level metadata information extracted by the metadata extraction unit 17 is input to the control circuit 9 ( first control circuit ). The control circuit 9 converts the input importance level metadata information into a data format that can be transmitted through the CEC line of the HDMI cable 102 and outputs the data format to the HDMI transmission unit 5.

  In the HDMI transmission unit 5, on the signal line of the HDMI cable 102, video data and audio data are output to the monitor 200 via TMDS, and importance level metadata information is output to the monitor 200 via CEC.

  The importance level metadata information may be transmitted through a signal line other than CEC. Also, Vendor Specific Commands are used for CEC transmission (see High-Definition Multimedia Interface Specification Version 1.3, CEC 13).

Next, the operation in the monitor 200 will be described. An arbitrary program is reproduced from the DVD recorder 100 connected by the HDMI cable 102, and the video data 11, audio data 12, and importance level metadata information are input to the monitor 200 via the HDMI cable 102. The video data 31 input to the HDMI receiving unit 21 is output to the video correction circuit 22, and the audio data 32 input to the HDMI receiving unit 21 is output to the audio correction circuit 23. The importance level metadata information input to the HDMI receiving unit 21 via the CEC is output as the importance level metadata 37 to the control circuit 24 ( second control circuit). The control circuit 24 optimizes the setting values of the video parameter and the audio parameter according to the importance level metadata information obtained from the importance level metadata 37. Video parameters include brightness, contrast, hue, and gamma correction, and audio parameters include volume.

  These parameters are recorded in advance in the control circuit 24, and the setting values of the parameters are read and changed based on the importance level metadata information obtained from the DVD recorder 100. The changed video parameter 35 is output to the video correction circuit 22, and the changed audio parameter 34 is input to the audio correction circuit 23. In the video correction circuit 22, the video data 31 is corrected based on the input video parameter 35, and the corrected video data is input to the display unit 25 and displayed on a screen (not shown). In the sound correction circuit 23, the sound data 32 is corrected based on the input sound parameter 34, and the corrected sound data is input to the sound output unit 26, converted into an actual sound and output.

  From the above, the DVD recorder 100 also records importance level metadata information when recording a program, and transmits the importance level metadata information to the monitor 200 when reproducing the program. Automatically corrects the video and audio corresponding to the level. Therefore, it is automatically changed so that the image quality and the sound volume are suitable for the importance level without complicated operations by the user. For example, the part with a high importance level is a scene that is representative of the program, and it is easy for the user to view if the video is zoomed or the brightness, contrast, etc. of the video and the volume of the audio are set to a high level. It becomes possible to change automatically.

  As an example of use of the present invention, a digital monitor that receives and displays a digital broadcast, for example, a digital broadcast compatible liquid crystal television and an interface that can transmit and receive data bidirectionally, such as HDMI, is also received and recorded and played back. The present invention can be applied to a disc recorder, such as a HDD built-in DVD recorder.

It is a block diagram which shows the structure of the HDMI transmission / reception apparatus by Embodiment 1 of this invention. It is a block diagram which shows the structure of the HDMI transmission / reception apparatus by Embodiment 2 of this invention. It is a block diagram which shows the structure of the HDMI transmission / reception apparatus by Embodiment 3 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Antenna 2 Broadcast tuner 3 Recording drive 4 Decoding circuit 5 HDMI transmission part 6 Program information analysis part 7 Information addition part 8 Additional information extraction part 9 Control circuit 11 Video data 12 Audio data 13 Decoding circuit, 14 CM determination filter, 15 Importance level detection unit, 16 Metadata addition unit, 17 Metadata extraction unit, 21 HDMI transmission unit, 22 Video correction circuit, 23 Audio correction circuit, 24 Control circuit, 25 Display unit, 26 Audio output unit, 31 Video data, 32 Audio data, 33 Genre information data, 34 Audio parameter, 35 Video parameter, 36 CM switching information data, 37 Importance level metadata, 100 DVD recorder, 200 monitor, 101 HDMI terminal , 102 HDMI cable, 201 HDM Terminal.

Claims (1)

An HDMI transmission / reception system in which an HDMI transmission device and an HDMI reception device are connected by an HDMI cable,
  The HDMI transmission device
  An importance level detector that detects importance level metadata information indicating the importance of the program;
  An information adding unit for adding the importance level metadata information detected by the importance level detecting unit to the program;
  A recording drive for recording the program to which the importance level metadata information is added in the information adding unit;
  An additional information extraction unit for extracting the importance level metadata information from the program with the importance level metadata information reproduced from the recording drive;
  A first control circuit that converts the importance level metadata information into a data format that can be transmitted by HDMI;
With
  The HDMI receiving device
  A second control circuit for converting the importance level metadata information converted by the first control circuit and transmitted by the HDMI cable into the original importance level metadata information;
  A video correction circuit for correcting a video signal transmitted from the HDMI transmission device based on the importance level metadata information;
  An audio correction circuit for correcting an audio signal transmitted from the HDMI transmission device based on the importance level metadata information;
With
  The correction of the video correction circuit includes a correction for zooming the video, increasing the brightness of the video, or increasing the contrast of the video when the importance level of the importance level metadata information is high,
  The HDMI transmission / reception system according to claim 1, wherein the correction of the audio correction circuit includes a correction for increasing audio when the importance level is high.

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