WO2010007751A1 - 映像データ処理装置及び映像データ処理方法 - Google Patents
映像データ処理装置及び映像データ処理方法 Download PDFInfo
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- WO2010007751A1 WO2010007751A1 PCT/JP2009/003233 JP2009003233W WO2010007751A1 WO 2010007751 A1 WO2010007751 A1 WO 2010007751A1 JP 2009003233 W JP2009003233 W JP 2009003233W WO 2010007751 A1 WO2010007751 A1 WO 2010007751A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/44008—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving operations for analysing video streams, e.g. detecting features or characteristics in the video stream
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving MPEG packets from an IP network
- H04N21/4385—Multiplex stream processing, e.g. multiplex stream decrypting
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
Definitions
- the present invention relates to a video data processing apparatus that transmits or receives video data.
- HDMI High-Definition Multimedia Interface
- a normal operation until a video or the like is output in a device connected by the HDMI transmission method will be described.
- a device that outputs video data is called a source device, and a device that receives video data is called a sink device.
- the source device detects the HPD (Hot Plug Detect) signal, and then acquires EDID (Extended Display Identification Data) from the sink device. Based on this EDID, the source device recognizes the format of video / audio information and the like that can be output by the sink device.
- the HPD signal indicates whether or not the EDID of the sink device can be read correctly.
- the source device outputs a TMDS (Transition Minimized Differential Differential) signal for accessing an HDCP (High-bandwidth Digital Content Protection) register.
- the source device accesses the HDCP information through DDC communication, and acquires information about the sink device such as whether or not it is compatible with HDCP. Thereafter, the source device outputs a TMDS signal for display to the sink device, and performs HDCP authentication between the sink and the source using the information acquired so far. If the authentication is successful, video / audio is output.
- TMDS Transition Minimized Differential Differential
- HDCP High-bandwidth Digital Content Protection
- Patent Document 1 Related technology is disclosed in Patent Document 1, for example.
- An object of the present invention is to shorten the time until video / audio starts to be output when video data is transmitted / received by the HDMI transmission method.
- a video data processing apparatus is a video data processing apparatus that transmits video data to a sink device, and shows a log generation unit that generates log information and a video format that can be displayed by the sink device.
- Memory that receives and stores sink device information from the sink device, a log receiving unit that receives log information stored in the sink device, log information generated by the log generation unit, and stored in the sink device.
- a log comparison unit that determines whether or not the log information matches, and a log transmission unit that transmits the log information generated by the log generation unit to the sink device. If the log comparison unit determines that they match, the video data is transmitted to the sink device according to the sink device information in the memory.
- the video data is output to the sink device according to the sink device information in the memory. There is no need to read. For this reason, the time until video / audio starts to be output can be shortened.
- Another video data processing apparatus is a video data processing apparatus that displays a video represented by video data received from a source device, and receives log information transmitted from the source device.
- the log transmission / reception unit transmits the log information stored in the storage unit to the source device when an activation sequence is started between the source device and the video data processing device.
- the log information stored in the storage unit is transmitted to the source device, so in the source device, the current log information and the log information stored in the storage unit It can be determined whether or not.
- a video data processing method is a video data processing method for transmitting video data to a sink device, showing a log generation step for generating log information, and a format of video that can be displayed by the sink device.
- a log comparison step for determining whether or not the recorded log information matches, and a step of transmitting video data to the sink device according to the sink device information when determined to match in the log comparison step;
- FIG. 1 is a block diagram showing a configuration of a video data processing system according to an embodiment of the present invention.
- FIG. 2 is a flowchart showing an activation sequence in the source device of FIG.
- FIG. 3 is a flowchart of the log writing process of FIG.
- FIG. 4 is a block diagram showing a configuration of a modification of the video data processing system of FIG.
- FIG. 5 is a flowchart showing an activation sequence in the source device of FIG.
- FIG. 6 is a flowchart showing an activation sequence in the sink device of FIG.
- FIG. 7 is a flowchart of the source device information writing process of FIG.
- FIG. 1 is a block diagram showing a configuration of a video data processing system according to an embodiment of the present invention.
- the video data processing system in FIG. 1 includes a source device 10 and a sink device 50 connected by an HDMI cable 2.
- the source device 10 is a video data processing device that transmits video data and audio data to the sink device 50 by the HDMI transmission method, and is, for example, a DVD (Digital Versatile Disc) / HDD (Hard Disk Drive) recorder.
- the sink device 50 is a video data processing device that receives video data and audio data from the source device 10 by the HDMI transmission method, and is, for example, a digital television receiver.
- the HDMI cable 2 is defined by the HDMI standard, and has a DDC communication line used by the source device 10 for reading EDID.
- the source device 10 includes a memory 12, a CPU 14, and a transmission unit 16.
- the CPU 14 includes a log generation unit 22 and a log comparison unit 24.
- the transmission unit 16 includes a log transmission unit 32, a log reception unit 34, and an EDID reading unit 36.
- the sink device 50 includes a reception unit 52, a log transmission / reception unit 54, and an EDID storage unit 56. Although not particularly illustrated, the sink device 50 includes a display unit that displays video and an audio output unit that outputs audio.
- the log generation unit 22 generates a value indicating the source device 10 as log information.
- This value is a value that can specify the source device 10, for example, a value unique to the source device 10.
- the log transmission unit 32 transmits the log information generated by the log generation unit 22 to the sink device 50 after the connection between the source device 10 and the sink device 50 is established and then disconnected.
- the log receiving unit 34 receives log information stored in the EDID storage unit 56 of the sink device 50 from when the connection between the source device 10 and the sink device 50 is established until the video is displayed. This log information is log information transmitted from the log transmission unit 32 to the sink device 50 at the previous connection.
- the memory 12 receives the sink device information from the sink device 50 and stores it together with the log information generated by the log generation unit 22.
- the sink device information is information indicating a video format and the like that can be displayed by the sink device 50, and includes at least a part of the EDID.
- the memory 12 stores the sink device information received from the sink device 50 at the previous connection until new sink device information is written.
- the log comparison unit 24 compares the log information generated by the log generation unit 22 and stored in the memory 12 with the log information received by the log reception unit 34, and determines whether or not they match.
- the EDID storage unit 56 stores the EDID of the sink device 50.
- the EDID reading unit 36 reads the EDID of the sink device 50 from the EDID storage unit 56.
- the log transmission / reception unit 54 transmits and receives log information between the log transmission unit 32 and the log reception unit 34 from when the connection between the source device 10 and the sink device 50 is established to when the connection is disconnected.
- the EDID storage unit 56 stores log information transmitted from the log transmission unit 32 to the log transmission / reception unit 54.
- FIG. 2 is a flowchart showing an activation sequence in the source device 10 of FIG.
- the log transmission / reception unit 54 of the sink device 50 sources the log information stored in the EDID storage unit 56 in step S12.
- the log reception unit 34 receives the log information and outputs the log information to the log comparison unit 24.
- the log comparison unit 24 determines whether the log information in the memory 12 is valid based on the calculation by the log generation unit 22 or the log information acquired in step S12. If the log information is valid, the process proceeds to step S16. If the log information is not valid, the process proceeds to step S18.
- step S16 the log comparison unit 24 compares the log information acquired in step S12 with the log information in the memory 12. If the compared log information matches, the process proceeds to step S20. If the log information does not match, the process proceeds to step S18.
- step S ⁇ b> 18 the EDID reading unit 36 reads the EDID from the EDID storage unit 56 of the sink device 50. In step S ⁇ b> 20, the EDID reading unit 36 does not read the EDID from the sink device 50 and reads the sink device information stored in the memory 12.
- step S ⁇ b> 22 the transmission unit 16 outputs the HDCP confirmation TMDS signal for accessing the HDCP register of the sink device 50 to the sink device 50.
- step S24 the transmission unit 16 determines whether the sink device 50 supports HDCP from the access result to the HDCP register, includes the result in the sink device information, and determines the sink device information.
- step S ⁇ b> 26 the transmission unit 16 transmits the video data to be displayed on the sink device 50 and the audio data to be output to the reception unit 52 as a TMDS signal for display according to the sink device information read from the memory 12. Output.
- step S28 the receiving unit 52 receives the video data and audio data transmitted from the transmitting unit 16 by the TMDS signal.
- the sink device 50 starts displaying the video represented by the received video data on the display unit and outputting the audio represented by the received audio data from the audio output unit.
- step S ⁇ b> 30 the log generation unit 22 generates log information and stores it in the memory 12. Further, the CPU 14 stores the sink device information in the memory 12. The process in this step is possible after step S24.
- step S32 a log writing process is performed.
- FIG. 3 is a flowchart of the log writing process of FIG.
- the log comparison unit 24 compares the log information read in step S12 with the log information generated in step S30. If the two match, the process of FIG. 3 ends. If they do not match, the process proceeds to step S44.
- step S44 the log transmission unit 32 transmits log information to the log transmission / reception unit 54.
- the log transmission / reception unit 54 receives the log information transmitted from the log transmission unit 32 and writes it in the EDID storage unit 56.
- the source device 10 and the sink device 50 in FIG. 1 when the log information stored in the source device 10 and the log information stored in the sink device 50 match, from the sink device 50. Since it is not necessary to read out the EDID, the time until video / audio starts to be output can be shortened.
- step S44 the log generation unit 22 may generate a part or all of the values included in the EDID of the sink device 50 as log information. In this case, in step S ⁇ b> 44, the log generation unit 22 transmits the generated log information to the log transmission / reception unit 54 and stores it in the memory 12.
- the log information transmitted to the log transmission / reception unit 54 may be stored in the memory 12, and in this case, the log generation unit 22 may generate an arbitrary value as the log information.
- FIG. 4 is a block diagram showing a configuration of a modification of the video data processing system of FIG.
- the video data processing system in FIG. 4 is different from the video data processing system in FIG. 1 in that the source device 210 and the sink device 250 are replaced with the source device 10 and the sink device 50.
- the source device 210 is different from the source device 10 in that the source device 210 has a CPU 214 instead of the CPU 14.
- the sink device 250 is different from the sink device 50 in that the sink device 250 includes an EDID storage unit 256 that stores source device information instead of the EDID storage unit 56.
- FIG. 5 is a flowchart showing an activation sequence in the source device 210 of FIG.
- the flowchart of FIG. 5 is the same as the flowchart of FIG. 2 except that step S24 is performed after step S20 and that source device information write processing step S54 is included.
- step S20 When the sink device 250 that has been previously connected to the source device 210 is connected again, or when the activation sequence between the source device 210 and the sink device 250 is performed again, the process of step S20 is performed. Is called. In this case, since it has already been confirmed that the sink device 250 supports HDCP, the process of step S22 is not performed. Since the transmission unit 16 does not output the HDCP confirmation TMDS signal for accessing the HDCP register of the sink device 50 to the sink device 50, it is possible to prevent the TMDS signal from being output as noise.
- FIG. 6 is a flowchart showing an activation sequence in the sink device 250 of FIG.
- the TMDS signal output in step S22 in FIG. 5 is different from the TMDS signal output in step S26, the TMDS signal is switched, and noise may be output at the time of switching. Therefore, in order to make these TMDS signals the same signal, the sink device 250 performs screen display and audio output settings in the activation sequence of FIG.
- the sink device 250 reads the source device information from the EDID storage unit 256.
- This source device information includes information indicating the format of the video transmitted from the source device that has been connected to the sink device 250 until now.
- the sink device 250 determines whether the source device information read from the EDID storage unit 256 is valid, that is, whether the source device information when it was previously connected to the source device 210 has been read. Judge whether or not. If read, the process proceeds to step S66, and if not read, the process proceeds to step S68.
- step S66 the sink device 250 performs screen display and audio output settings in accordance with the source device information read from the EDID storage unit 256.
- step S68 the sink device 250 receives the source device information from the source device 210 by the TMDS signal, and performs screen display and audio output settings according to the source device information.
- step S69 the sink device 250 displays the video received by the TMDS signal.
- FIG. 7 is a flowchart of the source device information writing process of FIG.
- the CPU 214 determines whether or not a TMDS signal is generated in step S26 of FIG. If it is generated, the process proceeds to step S72. If it is not generated, the source device information writing process is terminated.
- step S ⁇ b> 72 the log transmission / reception unit 54 writes the source device information received from the source device 210 in the EDID storage unit 256.
- the sink device 250 does not use the TMDS signal received from the source device 210 and follows the read source device information. Set the screen display. For this reason, it is possible not only to shorten the time until screen display and audio output is started, but also to prevent noise due to switching of TMDS signals from being output.
- the present invention is useful for a video data processing apparatus and the like.
Abstract
Description
12 メモリ
22 ログ生成部
24 ログ比較部
32 ログ送信部
34 ログ受信部
50,250 シンク機器(映像データ処理装置)
54 ログ送受信部
56,256 EDID格納部(格納部)
Claims (6)
- シンク機器に映像データを送信する映像データ処理装置であって、
ログ情報を生成するログ生成部と、
前記シンク機器が表示可能な映像のフォーマットを示すシンク機器情報を前記シンク機器から受信し、格納するメモリと、
前記シンク機器に格納されたログ情報を受信するログ受信部と、
前記ログ生成部が生成したログ情報と前記シンク機器に格納されたログ情報とが一致するか否かを判定するログ比較部と、
前記ログ生成部が生成したログ情報を前記シンク機器に送信するログ送信部とを備え、
前記ログ比較部で一致すると判定された場合には、前記メモリ内の前記シンク機器情報に従って前記シンク機器に映像データを送信する
ことを特徴とする映像データ処理装置。 - 請求項1に記載の映像データ処理装置において、
前記ログ生成部は、
当該映像データ処理装置に固有の値を前記ログ情報として生成する
ことを特徴とする映像データ処理装置。 - 請求項1に記載の映像データ処理装置において、
前記ログ生成部は、
前記シンク機器のEDID(Extended Display Identification Data)に含まれる値の一部又は全部の合計を前記ログ情報として生成する
ことを特徴とする映像データ処理装置。 - ソース機器から受信した映像データで表される映像を表示する映像データ処理装置であって、
前記ソース機器から送信されたログ情報を受信するログ送受信部と、
前記ログ情報を格納する格納部とを備え、
前記ログ送受信部は、
前記ソース機器と当該映像データ処理装置との間で起動シーケンスが開始されると、前記格納部に格納された前記ログ情報を前記ソース機器に送信する
映像データ処理装置。 - 請求項4に記載の映像データ処理装置において、
前記格納部は、
前記ソース機器から送信された映像のフォーマットを示すソース機器情報を格納し、
当該映像データ処理装置は、
以前に前記ソース機器に接続された時のソース機器情報が前記格納部から読み出された場合には、前記以前に前記ソース機器に接続された時のソース機器情報に従って表示設定を行う
ことを特徴とする映像データ処理装置。 - シンク機器に映像データを送信する映像データ処理方法であって、
ログ情報を生成するログ生成ステップと、
前記シンク機器が表示可能な映像のフォーマットを示すシンク機器情報を前記シンク機器から受信し、格納する格納ステップと、
前記シンク機器に格納されたログ情報を受信するログ受信ステップと、
前記ログ生成ステップで生成されたログ情報と前記シンク機器に格納されたログ情報とが一致するか否かを判定するログ比較ステップと、
前記ログ比較ステップで一致すると判定された場合には、前記シンク機器情報に従って前記シンク機器に映像データを送信するステップと、
前記ログ生成ステップで生成されたログ情報を前記シンク機器に送信するログ送信ステップとを備える
ことを特徴とする映像データ処理方法。
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JP2010520756A JPWO2010007751A1 (ja) | 2008-07-14 | 2009-07-10 | 映像データ処理装置及び映像データ処理方法 |
CN2009801272975A CN102090055A (zh) | 2008-07-14 | 2009-07-10 | 影像数据处理装置和影像数据处理方法 |
US13/006,628 US20110109807A1 (en) | 2008-07-14 | 2011-01-14 | Video data processing device and video data processing method |
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JP2019110380A (ja) * | 2017-12-15 | 2019-07-04 | サイレックス・テクノロジー株式会社 | 画像転送中継装置、および、その制御方法 |
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JP2019110380A (ja) * | 2017-12-15 | 2019-07-04 | サイレックス・テクノロジー株式会社 | 画像転送中継装置、および、その制御方法 |
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CN102090055A (zh) | 2011-06-08 |
JPWO2010007751A1 (ja) | 2012-01-05 |
US20110109807A1 (en) | 2011-05-12 |
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