WO2006025441A1 - 画像処理装置、音声処理装置、画像音声供給装置、及び画像音声処理システム、並びに画像音声同期方法 - Google Patents
画像処理装置、音声処理装置、画像音声供給装置、及び画像音声処理システム、並びに画像音声同期方法 Download PDFInfo
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- WO2006025441A1 WO2006025441A1 PCT/JP2005/015887 JP2005015887W WO2006025441A1 WO 2006025441 A1 WO2006025441 A1 WO 2006025441A1 JP 2005015887 W JP2005015887 W JP 2005015887W WO 2006025441 A1 WO2006025441 A1 WO 2006025441A1
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- delay information
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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
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network
- H04N21/43632—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network involving a wired protocol, e.g. IEEE 1394
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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
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
- H04N21/43072—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen of multiple content streams on the same device
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/162—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
- H04N7/163—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing by receiver means only
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N9/804—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components
- H04N9/806—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components with processing of the sound signal
Definitions
- Image processing device audio processing device, image / audio supply device, image / audio processing system, and image / audio synchronization method
- the present invention is an image used for image display and audio output, for example, using an image signal and an audio signal that are reproduced and output from a recording medium or transmitted over a network via a digital interface.
- the present invention relates to a processing device and a sound processing device.
- an image / audio supply device that supplies an image signal and an audio signal reproduced from a recording medium to the image processing device and the audio processing device, and an image that performs image display and audio output by the image processing device and the audio processing device.
- the present invention relates to an audio processing system and an image / audio synchronization method for synchronizing and reproducing such an image and audio.
- a large panel such as a PDP (Plasma Display Panel) is used as the display in that case.
- PDP Plasma Display Panel
- the front stage of the driver that drives the panel is almost digitized, and additional digital high-quality processing such as 3D YZC separation, noise reduction, contour correction, resolution conversion, etc. is added. It tends to go.
- additional digital high-quality processing such as 3D YZC separation, noise reduction, contour correction, resolution conversion, etc.
- Patent Document 2 discloses a method for synchronous playback between a plurality of devices accompanying networking.
- the various devices (sink device group) connected to the network
- the playback time of the received content data is specified by the controller that controls the entire system.
- the playback time is set in consideration of the maximum value of the network delay and the maximum value of the decode delay of the sink device group.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2002-344898
- Patent Document 2 Japanese Patent Laid-Open No. 2003-037585
- the actual image signal delay amount is not always constant. Even if it is an image signal, the analog or digital power, MPEG-TS and DV are digital, the compression method is different, and the SD (Standard Definition) or HD (High Definition) has a different resolution. In this case, the necessary processing differs accordingly. For this reason, the delay amount inevitably differs depending on the contents of each process, and such a change in delay amount becomes a problem when performing lip sync.
- the present invention has been made in view of, for example, the above-described problems, and is an image processing device and an audio processing device capable of always automatically adjusting lip sync while flexibly responding to differences in connection methods between devices. It is an object of the present invention to provide an image / audio supply device, an image / audio processing system, and an image / audio synchronization method. Means for solving the problem
- an image processing apparatus of the present invention acquires an image signal having a time-series correspondence relationship with an audio signal, and the image signal is included in the acquired image signal.
- Image processing means for performing image processing for display according to a processing procedure according to the format of the image, and generating image delay information including the delay amount of the image signal generated in accordance with the image processing being executed or about to be executed
- image processing for display refers to processing performed on an image signal acquired from the transmission path in order to drive a display panel such as a PDP, such as high-quality video processing.
- the processed image signal is output to an external or built-in display driver and used to drive the display.
- image processing requires different processing contents depending on the format of the acquired image signal. That is, the image processing means performs image processing according to different procedures depending on the signal format, and accordingly, the delay amount of the image signal in the image processing apparatus may fluctuate with time.
- the acquisition or generation of the delay amount of the image signal which is such a variation value, and information including this delay amount (ie, image delay information) are performed in parallel with the image processing. Or prior to image processing.
- the “delay amount of the image signal” is an index amount of the delay of the image signal accompanying the image processing.
- the time delay before and after various processing of the image signal in the image processing apparatus It can be expressed as a time lag caused by input / output to the processing device or a relative delay amount of the image signal after image processing with respect to the audio signal.
- image delay information is information on the image processing apparatus side including the above-described delay amount among information necessary for synchronization processing between an image signal and an audio signal. That is, the delay amount of the image signal.
- information such as the signal format of the image signal being processed and the time when the delay amount is acquired may be included as appropriate.
- the image delay information is generated as “information including the delay amount of the image signal being processed”. “Generate” here means that image delay information to be sent to the audio processing device is newly generated at each time point, and one of several delay amounts or delay information is selected. Such cases are also included. As described above, since the delay amount also changes depending on the processing procedure in image processing, it is desirable that the image delay information be grasped or generated based on the correspondence between the delayed image signal and the processing procedure.
- the generated image delay information is transmitted to an audio processing device that receives an audio signal corresponding to the image signal acquired by the image processing device.
- a sound processing device configured to delay the sound signal in accordance with the image delay information (that is, the sound processing device of the present invention) is applied. This makes it possible to automatically adjust the lip sync.
- the image processing apparatus of the present invention uses the audio processing apparatus as a final image / audio synchronization means, and delays the audio signal using an audio delay memory or the like, for example, to accompany the image processing.
- the present invention is applied to a system that compensates for a delay of an image signal.
- This image processing device sends image delay information to the sound processing device.
- the image delay information sent here corresponds to the processing procedure being executed or about to be executed by the image processing apparatus, proper lip synchronization is always possible.
- the image processing apparatus for a normal image processing apparatus, (1) generates image delay information corresponding to an image processing procedure in parallel with image processing, and (2) image delay This is achieved by modifying the information so that it is sent to the audio processing device.
- the image processing apparatus may be integrated with a display panel that performs image display, or may be configured separately from the display panel as an apparatus that supplies an image signal to a drive unit of the display panel. .
- the image processing device is configured separately from the sound processing device.
- the image processing device is configured separately from the sound processing device. It is a general system that supplies images and sound to such image processing devices and sound processing devices. However, since there is no means for exchanging information other than video and audio (ie, information transmission / reception interface) between them, the audio processing device cannot know the image delay information, and lip sync using audio delay is not possible. Have difficulty.
- the image processing apparatus of the present invention exchanges image delay information with the audio processing apparatus, so that lip synchronization using audio delay by the audio processing apparatus is possible.
- the audio processing device acquires the audio signal from at least the first transmission path to which the image signal and the audio signal are supplied, and also acquires the image.
- the means obtains the image signal from the first transmission path, and the sending means sends the image delay information to the second transmission path interposed between the audio processing apparatus and the audio processing apparatus. .
- the image processing apparatus acquires the image signal from the first transmission path.
- the “first transmission path” is an information transmission medium to which at least an image signal and an audio signal having a time-series correspondence relationship are supplied together, and the image processing apparatus of the present invention acquires the image signal.
- the voice processing device is configured to acquire voice information.
- the first transmission path is not limited to a single transmission path, and may be, for example, two or more information transmission media that separately transmit an image signal and an audio signal.
- the “transmission path” here includes not only wired communication but also wireless communication media.
- transmission / reception of the image delay information is directly performed between the image processing apparatus and the sound processing apparatus via the second transmission path.
- the first transmission line is, for example, a serial nos network
- the second transmission line may partially share the path with the first transmission line.
- the image processing apparatus has the image delay information between the audio processing apparatus and the image processing apparatus. Since the second transmission path that can be collected is established regardless of the first transmission path related to the transmission and reception of image signals and audio signals, the signal format and other problems in the first transmission path must be fully considered. Therefore, it is possible to send image delay information to the sound processing device easily and reliably. Therefore, it is possible to cause the audio processing device to execute lip sync while flexibly dealing with the difference in connection method between devices.
- the image delay information generating means associates storage information including a delay amount of the image signal generated in association with the image processing with the processing procedure.
- storage means for storing in advance, determination means for determining the processing procedure being executed or to be executed in the image processing, and the storage information corresponding to the determined processing procedure. And selecting the image delay information, and generating the image delay information as information including the selected storage information.
- the image processing apparatus stores a plurality of image delay amounts in advance in association with the processing procedure.
- the image processing means performs image processing according to different procedures depending on the signal format, but the processing procedure is patterned according to the circuit configuration etc. in the image processing means! Therefore, the delay amount (that is, the image delay amount) of a plurality of image signals existing according to the processing procedure can be recognized in advance. Therefore, in this aspect, the pattern information of the image delay amount is stored as storage information.
- the actual stored information is information including an image delay amount such as a table of image delay amounts and processing procedures. Then, during the image processing, a processing procedure being executed or about to be executed is determined, and storage information corresponding to the determined processing procedure is selected from the storage means.
- the image delay amount in the stored information selected at this time is exactly "the current delay amount of the image signal or the delay amount associated with the processing to be executed in the future", and finally the image including this Delay information is generated. Therefore, proper lip sync is always possible.
- the switching of the processing procedure is detected, and the selection means and the sending means are connected to the image corresponding to the processing procedure after the switching. It should be further provided with first control means for controlling to send delay information.
- the image delay information is used to switch the processing procedure in the image processing apparatus. Sent as a hook.
- the processing procedure is switched by changing the format of the acquired image signal, and the image delay amount is changed accordingly. That is, in this case, the image delay information on the sound processing apparatus side can be updated in response to the change in the image delay amount, and appropriate lip sync is always possible.
- a receiving unit that receives a transmission request for the image delay information transmitted from the audio processing device via the second transmission path, and the selection unit And a second control means for controlling the transmission means to send the image delay information in response to the transmission request.
- the image delay information is transmitted in response to reception of a transmission request from the audio processing device.
- the image processing apparatus is controlled by the sound processing apparatus at least a part of the transmission timing of the image delay information. Therefore, it is possible to construct a system for managing delay information in conjunction with the image processing apparatus and the sound processing apparatus.
- the image delay information generation means includes processing status information indicating an execution status of the image processing in the image delay information.
- processing status information represents the operating status of the image processing apparatus.
- image delay information When image delay information is responded in response to a request from the audio processing device, such information may not be sent back depending on the operating state or the like. For example, when a valid input terminal of the image processing device is switched, an internal signal processing path is prepared. Even if a request is received at this time, the image processing device actually receives at least the image signal. Since the delay amount cannot be determined until the signal format is determined, the image delay information corresponding to this processing may not be returned.
- the voice processing apparatus can send the processing status information as in this aspect, the voice processing apparatus that receives the image delay information can determine the situation in such a case. As a result, the processing related to the delay of the audio signal in the audio processing device can be executed accurately. You can
- the image delay information generating means includes at least identification information for identifying an input / output path of the image signal in the image delay information.
- the image processing device sends information for identifying the input / output path to the audio processing device together with the information on the delay of the image signal.
- the information for identifying the input / output path is information for identifying the input / output direction of the image signal or the terminal used for input / output.
- identification information related to the audio signals may also be sent to the audio processing device.
- an image processing apparatus often includes a plurality of types of image input terminals. These terminals support analog, HDMI, etc.
- the image processing apparatus can simultaneously capture the plurality of input terminal force image signals. If the delay information is determined before the image signal is input to the image processing device, the signal path and signal processing from the input terminal in the image processing device until the video is displayed will change at each input terminal, so the delay amount May be different. Therefore, the image processing apparatus cannot determine the delay amount to be notified to the sound processing apparatus unless the input path of the image signal (specifically, the type of the input terminal) is designated.
- the image processing apparatus is a TV receiver and the received audio signal is output to the audio processing apparatus, the same situation as the input terminal occurs at the output terminal of the image processing apparatus. obtain. That is, when the image processing apparatus includes a plurality of types of output terminals, the delay amount may differ because the signal path to the output terminal and the signal processing change. In particular, when analog audio signals are output, it is necessary to decode the compressed audio, so the delay time that occurs before output differs from IEC60958.
- the audio processing device and the image processing device exchange identification information as additional information of the image delay information
- the audio processing device corresponds to the signal input / output path in the image processing device.
- Image delay information to be acquired can be acquired. As a result, it is possible to improve the accuracy of the delay amount related to the delay of the audio signal in the audio processing device.
- the first audio processing device of the present invention acquires an audio signal having a time-series correspondence relationship with an image signal, and the acquired audio signal includes: Audio processing means for performing audio processing for output, and the image generated from the image processing being executed or about to be executed, sent from the image processing device for performing image processing for display on the image signal Receiving means for receiving image delay information including a signal delay amount; delay means for delaying the audio signal based on the received image delay information to compensate for a time difference between the image signal and the audio signal; Is provided.
- output audio processing refers to processing performed on an audio signal acquired from the transmission path to drive an audio output device such as a speaker, such as various types of compressed audio decoding, amplification for output from a speaker, This refers to sound quality processing by DSP (Digital Signal Processor) that enhances the sense of presence and adjusts the balance between speech and sound effects.
- DSP Digital Signal Processor
- the audio processing device of the present invention further receives image delay information from the above-described image processing device that performs image processing on the image signal having a time-series correspondence relationship with the audio signal, and the image delay information is included in the image delay information. It is configured to delay the audio signal based on it.
- the image delay information is delay information related to image processing that is being executed or will be executed in the image processing apparatus.
- this sound processing apparatus functions as a means for finally synchronizing an image and sound, and is applied to a system that compensates for a delay of an image signal accompanying image processing by delaying the sound signal.
- the image delay information received here reflects the delay amount of the image signal due to the image processing being executed in the image processing apparatus, and appropriate lip sync is always possible.
- the image processing apparatus is configured separately.
- the sound processing device is configured separately from the image processing device.
- the audio processing device of the present invention can exchange image delay information with the image processing device. Therefore, lip synchronization using an audio delay by a sound processing device is possible.
- the image processing device obtains the sound signal from at least a first transmission path to which the image signal and the sound signal are supplied, and Audio acquisition means acquires the audio signal from the first transmission path, and the reception means receives the image delay information from a second transmission path interposed between the video processing apparatus.
- the sound processing device acquires the sound signal from the first transmission path.
- the “first transmission path” and the “second transmission path” are synonymous with the first transmission path and the second transmission path in the image processing apparatus of the present invention.
- the transmission / reception of the image delay information is directly performed between the image processing apparatus and the sound processing apparatus through the second transmission path.
- Transmission and reception of image delay information can be realized easily and reliably without sacrificing the flexibility of the interface format applied to the transmission path. It should be noted that the device configuration in which the second transmission path is set separately from the first transmission path has the advantage of high versatility.
- the delay means is configured to generate the sound signal based on the received image delay information each time the receiving means receives the image delay information. Update the delay amount.
- the image delay information used for delaying the audio signal is updated each time the image processing apparatus receives the signal, so that appropriate lip sync is always possible.
- the audio processing apparatus further includes a first transmission unit that transmits a transmission request for requesting transmission of the image delay information to the image processing apparatus.
- the sound processing device actively acquires the image delay information by making a transmission request to the image processing device itself. Therefore, it is possible to construct a system in which the image processing device and the sound processing device work together to manage delay information.
- sound delay information including a delay amount of the sound signal generated in association with the sound processing being performed or about to be performed is generated.
- Voice delay information generating means, and the delay means is also based on the voice delay information.
- the audio signal is delayed.
- the audio processing device performs lip sync based on not only the image delay information but also the audio delay information as the final image and audio synchronization means.
- the delay of the image signal is larger, but actually, some delay occurs in the audio signal due to the audio processing. That is, in the audio processing, the delay amount may change depending on whether the audio signal is analog or digital, as in the image processing described above. Acquisition of the delay amount of the audio signal as such a fluctuation value and generation of information including the delay amount (that is, audio delay information) are performed in parallel with the audio processing. That is, “the current delay amount of the audio signal in the audio processing apparatus or the delay amount associated with the process to be executed from now on” is acquired.
- the image delay information includes processing status information indicating an execution status of the image processing.
- the audio processing apparatus is able to transmit the actual situation of image processing as described above.
- the image delay information includes at least identification information for identifying an input / output path of the image signal.
- information for identifying an input / output path is received from the image processing apparatus together with information on delay of the image signal.
- identification information relating to this audio signal may also be received.
- the audio processing apparatus corresponds to the signal input / output path in the image processing apparatus.
- the image delay information to be acquired can be acquired.
- the audio processing device attaches such identification information to the delay information acquisition request to the image processing device and inquires about the delay information, thereby connecting the appropriate input / output terminals and transmitting each signal. It is also possible to determine whether or not it is present.
- the video output terminal of an image / sound supply device serving as a signal source of a DVD player or the like is connected to the image processing device only with an analog cable, and the image processing device is connected to the display only with HDMI.
- the processor power can also prompt the user to connect the image signal to the display with an analog cable.
- the second audio processing apparatus of the present invention supplies an image signal and an audio signal having a time-series correspondence relationship with the image signal after the signal processing for supply. From the image / audio supply device, the sound acquisition means for acquiring the sound signal, the sound processing means for performing sound processing for output on the acquired sound signal, and the image / audio supply device force are sent out, Receiving means for receiving signal delay information including a delay amount of at least one of the image signal and the audio signal generated in accordance with signal processing being executed or about to be executed, and compensating for a time difference between the image signal and the audio signal And delay means for delaying the audio signal based on the received signal delay information.
- the audio processing device performs lip sync based on the signal delay information in the image and audio supply device as means for finally synchronizing the image and audio.
- the “image / sound supply device” is a signal supply source for the image processing device and the sound processing device, and is configured to supply the image signal and the sound signal after signal processing for supply such as compression.
- signal processing for supply refers to reproducing image signals and audio signals from a recording medium and supplying them to an image processing device and an audio processing device in order to drive an AV device such as a display panel or a speaker. This refers to the processing performed for the purpose.
- the audio processing device receives information including the amount of delay of the image signal that is generated by the signal processing and transmitted as the “signal delay information” by the image / audio supply device.
- the signal delay information is delay information relating to signal processing that is currently being executed or is about to be executed in the video / audio supply device.
- each of the delay amount of the image signal and the delay amount of the sound may be handled individually. Alternatively, the difference between the two may be handled.
- the time delay between the image signal and the audio signal can be accurately derived by considering the signal delay information, and appropriate lip sync can be performed automatically at all times. It becomes.
- the audio / video supply device is configured separately.
- the image and sound supply device supplies the image signal and the sound signal to the first transmission path
- the sound acquisition means includes: The audio signal is acquired from the first transmission path, and the receiving means receives the signal delay information from a third transmission path interposed between the video and audio supply device.
- the audio processing device acquires the audio signal from the first transmission path and the signal delay information from the third transmission path.
- the “first transmission path” here is synonymous with the first transmission path in the image processing apparatus of the present invention.
- the “third transmission path” is a transmission path established for supplying signal delay information from the video / audio supply apparatus to the audio processing apparatus, and is similar to the second transmission path in the image processing apparatus of the present invention.
- the interface type is set separately from the first transmission line, but it may actually be constructed as part of the first transmission line.
- the third transmission line is set based on the same concept as the above-described second transmission line, so the degree of freedom of the interface type applied to the first transmission line is sacrificed.
- the delay information can be easily and reliably transmitted and received, and the versatility of the device configuration is high.
- the delay means delays the sound signal based on the received delay information each time the receiving means receives the delay information. Update quantity.
- the delay information used for the delay of the audio signal is updated every time it is received by the audio / video supply device, so that an appropriate lip sync is always possible.
- the audio processing device further includes second transmission means for transmitting a transmission request for requesting transmission of the delay information to the video / audio supply device.
- the audio processing device actively acquires the delay information by making a transmission request to the image / audio supply device itself. Therefore, it is possible to construct a system for managing delay information in conjunction with the audio / video supply device and the audio processing device.
- sound delay information including a delay amount of the sound signal generated along with the sound processing being performed or about to be performed is generated.
- Voice delay information generating means is further provided, and the delay means delays the voice signal based on the voice delay information.
- the audio processing apparatus performs lip synchronization based on not only the signal delay information but also the audio delay information as the final video and audio synchronization means. Therefore, the time lag between the image signal and the audio signal can be compensated more accurately, and appropriate lip sync is possible.
- the signal delay information includes processing status information indicating an execution status of the signal processing.
- processing status information indicates the operating status of the image and sound supply apparatus.
- the image / sound supply device responds to the signal delay information in response to a request from the sound processing device, the information may not be sent back depending on the operating state or the like. For example, when a valid input terminal in the device is switched, an internal signal processing path is prepared. Even if a request is received at this time, the image / audio supply device does not receive at least an image signal or an audio signal. Since the delay amount cannot be determined until the signal format is actually received and the signal format is determined, the signal delay information corresponding to this processing may not be returned.
- the audio processing device can transmit the audio signal by transmitting the actual status of the signal processing as described above. This makes it possible to accurately perform the processing related to the delay.
- the signal delay information includes identification information for identifying at least one input / output path of the image signal and the audio signal.
- information for identifying these input / output paths is received from the image / sound supply apparatus together with information regarding the delay of at least one of the image signal and the sound signal.
- an image / audio supply device such as a DVD player normally includes a plurality of types of image output terminals and audio output terminals. These terminals support analog, IEC60958, IEEE1394, etc. for audio output, and support analog, HDMI, etc. for image output.
- the video / audio supply device can simultaneously output a plurality of output terminal audio signals such as analog, IEC60958, etc. that are not related to the connection before the output terminal.
- the output signal delay may differ between terminals due to the deviation of the output timing. Specifically, this corresponds to the case where the compressed audio is decoded and output in analog form on the image and audio supply device side, and the case where it is output digitally according to IEC60958. If the delay difference that occurs in this case is taken into account, if the audio signal output path (specifically, the output terminal) is not specified, the audio / video supply device determines the delay amount to be notified to the audio processing device. I can't.
- the audio processing device and the video / audio supply device exchange identification information as additional information of the signal delay information
- the audio processing device is connected to the signal input / output path in the video / audio supply device.
- the signal delay information corresponding to can be acquired. As a result, it is possible to improve the accuracy of the delay amount related to the delay of the audio signal in this audio processing device.
- the audio processing apparatus in this case provides such identification information to the image / audio supply apparatus.
- the video output terminal of a video / audio supply device that is a signal source of a DVD player or the like is connected to the image processing device only with an analog cable, and the image processing device is connected to the display only with HDMI.
- the image processing device can also prompt the user to connect the image signal to the display with an analog cable.
- an image / audio supply device has a recording medium force in which an image signal and an audio signal having a time-series correspondence relationship with the image signal are recorded.
- a signal processing means for performing signal processing for supply on the reproduced image signal and audio signal in a processing procedure corresponding to each signal format, and the image signal after the signal processing and Supplying each of the audio signals to an image processing device that performs image processing for display on the image signal and an audio processing device that performs audio processing for output to the audio signal;
- Signal delay information generating means for generating signal delay information including a delay amount of at least one of the image signal and the audio signal generated by the signal processing to be performed, and the signal delay information are provided to the audio processing device.
- the image signal and the audio signal are reproduced from a recording medium such as a DVD, and the reproduced image signal and audio signal are converted into respective signal formats.
- the signal processing for supply is performed in accordance with the corresponding processing procedure.
- the processed image signal and audio signal are supplied to the image processing apparatus and the audio processing apparatus, respectively.
- the delay amount of the image signal or the audio signal that is, the processing amount such as compression differs depending on the signal format
- the processing content that is, Signal delay
- the “delay amount of at least one of the image signal and the audio signal” here is an index amount of the delay of the image signal or the audio signal accompanying the signal processing, for example, the image signal or the audio signal in the image / audio supply device.
- Time delay before and after various processing of audio signals, time lag caused by input / output of image signal or audio signal to / from this image / audio supply device, or between image signal and audio signal after signal processing It can be expressed as a relative delay amount.
- the signal delay amount which is such a temporal variation value, or! The acquisition or generation of information including other information is executed in parallel with the signal processing or prior to the signal processing. That is, the “current signal delay amount in the image signal supply apparatus or a signal delay amount associated with a process to be executed in the future” is acquired or generated. As described above, since the delay amount also changes depending on the processing procedure in the signal processing, the signal delay information is generated without grasping the correspondence between the delayed image signal or audio signal and the processing procedure. I hope that.
- the signal delay information generated in this way is sent to the audio processing device to which the audio signal is supplied from the image / audio supply device.
- the sound processing device configured to delay the sound signal in accordance with the signal delay information (ie, the sound processing device of the present invention). By applying, automatic adjustment of ripple sync can be realized.
- the video / audio supply device uses the audio processing device as a final video / audio synchronization means, and delays the audio signal using, for example, an audio delay memory or the like. It is applied to a system that compensates for image signal delays associated with processing. Since this image / sound supply device sends the “current signal delay information” to the sound processing device, proper lip synchronization is always possible.
- the video / audio supply device of the present invention generates (1) signal delay information corresponding to a signal processing procedure in parallel with signal processing, compared with a normal video / audio supply device, and (2) This is realized by modifying the signal delay information so as to be sent to the sound processing apparatus.
- the audio / video supply device is configured separately from the audio processing device.
- the audio processing device is configured separately from the audio / video supply device.
- the audio processing apparatus of the present invention can exchange signal delay information with the audio / video supply apparatus, lip synchronization using audio delay by the audio processing apparatus is possible.
- the supply means may be configured to perform post-signal processing.
- the image signal and the audio signal are respectively supplied to a first transmission path interposed between the image processing device and the audio processing device, and the sending means is directed to the audio processing device.
- the signal delay information is sent to a third transmission path interposed between the audio processing device.
- the audio / video supply device supplies the image signal and the audio signal to the first transmission path, and transmits the signal delay information to the third transmission path.
- the “first transmission path” and the “third transmission path” here are synonymous with the first transmission path and the third transmission path in the second sound processing apparatus of the present invention.
- the third transmission line is set based on the same concept as the above-described second transmission line, so the degree of freedom of the interface type applied to the first transmission line is sacrificed.
- the delay information can be easily and reliably transmitted and received, and the versatility of the device configuration is high.
- the signal delay information generating means includes stored information including a delay amount of at least one of the video signal and the audio signal generated in association with the signal processing.
- Storage means for storing in advance corresponding to the processing procedure, determination means for determining at least one of the processing procedure being executed or about to be executed at the time of the signal processing, and the determined Selection means for selecting the storage information corresponding to the processing procedure with reference to the storage means, and generating the signal delay information as information including the selected storage information.
- the video / audio supply apparatus stores in advance the delay amount (that is, the signal delay amount) of at least one of the video signal and the audio signal corresponding to the processing procedure. That is, the image / sound supply device includes a signal delay amount based on the same concept as the image processing device of the present invention, and information patterned for each processing procedure is stored as storage information. .
- the actual stored information is, for example, a table of signal delay amounts and processing procedures.
- the processing procedure being executed or about to be executed is determined, and the storage information corresponding to the determined processing procedure is selected from the storage means. Select this time
- the signal delay amount in the stored information is exactly “the current signal delay amount or the signal delay amount due to the signal processing to be performed from now on”, and finally the signal delay information including this is included. Generated. Therefore, proper lip sync is always possible.
- the switching of the processing procedure is detected based on the determination result of the determining means, and the selection means and the sending means are associated with the processing procedure after the switching. And further comprising third control means for controlling to send the signal delay information.
- the signal delay information is transmitted in response to the switching of the processing procedure in the video / audio supply device.
- the processing procedure is switched by changing the format of the reproduced image signal or audio signal, and the delay amount (that is, the signal delay amount) of the image signal or audio signal changes accordingly. Therefore, the signal delay information on the audio processing device side can be updated immediately in response to this change in the signal delay amount, and appropriate lip sync is always possible.
- a receiving means for receiving a transmission request for the signal delay information sent from the audio processing apparatus, and the transmitting means, in response to the transmission request.
- a fourth control means for controlling to send the signal delay information.
- the delay information is transmitted with the reception of a transmission request from the voice processing apparatus as a guide.
- the audio / video supply apparatus is controlled by the audio processing apparatus at least a part of the signal delay information transmission timing. Therefore, it is possible to construct a system that manages the signal delay information in conjunction with the audio / video supply device and the audio processing device.
- the signal delay information generating means includes processing status information indicating an execution status of the signal processing in the signal delay information.
- “Processing status information” represents the operating status of the image processing apparatus. If the audio / video supply apparatus can send the processing status information in this way, the audio processing apparatus that receives the signal delay information can determine the situation in the above case. As a result, the voice processing device The processing related to the delay of the audio signal can be executed accurately.
- the signal delay information generating means identifies the input / output path of at least one of the video signal and the audio signal in the signal delay information. Include identification information.
- the video / audio supply device sends information for identifying these input / output paths together with the information regarding the delay of the video signal and / or the audio signal (at least one of them).
- the information for identifying the input / output path is information for identifying the input / output direction of the image signal or the audio signal, or the terminal used for input / output.
- the audio processing device and the audio / video supply device exchange identification information as additional information of the signal delay information, the signal input / output path in the audio / video supply device is transmitted to the audio processing device.
- the signal delay information corresponding to can be acquired. As a result, it becomes possible to improve the accuracy of the delay amount related to the delay of the audio signal in the audio processing device.
- the first image / audio processing system of the present invention includes at least a first transmission path to which an image signal and an audio signal having a time-series correspondence relationship with the image signal are supplied, An image processing device that performs image processing for display on the image signal acquired from the first transmission path force, and an audio processing device that performs audio processing for output on the audio signal acquired from the first transmission path And a second transmission path interposed between the image processing device and the sound processing device, wherein the image processing device and the sound processing device respectively transmit the image signal and the sound signal to the first signal.
- the image processing apparatus obtains the image delay information including a delay amount of the image signal generated in accordance with the image processing being executed or about to be executed, and acquiring the image delay information from the transmission path.
- the audio processing device receives the image delay information transmitted from the image processing device via the second transmission channel, and receives a time difference between the image signal and the audio signal. The audio signal is delayed based on the received image delay information.
- the image processing device and the sound processing device are provided.
- the apparatus is configured to acquire an image signal and an audio signal from the first transmission path, respectively, and to transmit and receive image delay information via the second transmission path.
- image processing apparatuses and sound processing apparatuses are provided.
- the audio processing device is used as the final image / audio synchronization means, and the delay of the image signal due to the image processing is compensated by delaying the audio signal.
- a delay amount and the like are set based on the image delay information sent from the image processing apparatus to the audio processing apparatus. As described above, since this image delay information corresponds to the processing procedure being executed or about to be executed by the image processing apparatus, the lip sync automatic adjustment is always properly performed in this system. Is possible.
- the image delay information without sacrificing the flexibility of the interface format of the first transmission path. Can be realized very easily.
- the image processing apparatus and the sound processing apparatus of the present invention are not so burdensome as to mount an interface suitable for the second transmission path for the exchange of image delay information, compared to the normal configuration. It can be realized without any problem, and the input format of the image signal and audio signal is not limited.
- the second image / audio processing system of the present invention is supplied with at least an image signal and an audio signal having a time-series correspondence relationship with the image signal.
- An audio / video supply device that supplies the first transmission path with signal processing for supplying the image signal and the audio signal to the first transmission path, and outputs the audio signal acquired from the first transmission path.
- An audio processing device that performs audio processing; and a third transmission path interposed between the image and audio supply device and the audio processing device, wherein the image and audio supply device includes the image signal and audio after the signal processing.
- Each of the signals is supplied to the first transmission line, and signal delay information including a delay amount of at least one of the image signal and the audio signal, which is generated during the signal processing being executed or about to be executed.
- Generating the signal delay Information is sent to the third transmission line, the voice processing device acquires the voice signal via the first transmission path, performs voice processing for output on the acquired voice signal, and Receiving the signal delay information via a third transmission line, and receiving the received signal delay information; Based on the! /, The audio signal is delayed.
- the image / audio processing system is configured such that a signal is supplied from the image / audio supply device to the first transmission path. Then, the audio signal delay (ie, lip sync) by the audio processing device is performed based on the delay information of the image signal or audio signal in the image / audio supply device. For this reason, automatic adjustment of ripple sync can always be performed properly.
- a first image / audio synchronization method of the present invention includes a first transmission path to which at least an image signal and an audio signal having a time-series correspondence relationship with the image signal are supplied;
- An image processing device that performs image processing for display on the image signal acquired from the first transmission path, and audio processing that performs audio processing for output on the audio signal acquired from the first transmission path
- the acquired image delay information is sent to the second transmission path toward the audio processing apparatus, and the image processing apparatus and the audio processing apparatus respectively transmit the image signal and the image signal from the first transmission path.
- the first video / audio synchronization method of the present invention various benefits similar to those of the first video / audio processing system of the present invention described above can be obtained. Note that the image processing of the present invention described above. Corresponding to various aspects of the processing apparatus and the first sound processing apparatus of the present invention, the image / audio synchronization method of the present invention can also adopt various aspects.
- the second video / audio synchronization method of the present invention provides a first transmission in which at least an image signal and a voice signal having a time-series correspondence relationship with the video signal are supplied.
- An audio / video supply device that supplies the first transmission path with signal processing for supplying the image signal and the audio signal to the first transmission path, and outputs the audio signal acquired from the first transmission path.
- a synchronization method comprising: a step of constructing a third transmission path interposed between the video / audio supply device and the audio processing device; and the above-described signal processing that is caused by the signal processing being executed or about to be executed Image signal and audio signal Generating signal delay information including at least one of the delay amounts, sending the acquired signal delay information to the third transmission path toward the sound processing device, and supplying the image and sound Causing the apparatus to supply the image signal and the audio signal after the signal processing to the first transmission path; and the image processing apparatus and the audio processing apparatus respectively receive the image signal from the first transmission path.
- a step of acquiring the audio signal a step of the audio processing device receiving the delay information transmitted from the image / audio supply device via the third transmission path; and the image signal and the audio. Delaying the audio signal based on the received delay information to compensate for a time difference with the signal.
- the image and sound synchronization method of the present invention can also adopt various aspects.
- the image delay information generating means and the sending means are provided.
- the signal delay information generation means and the transmission means are provided.
- the receiving means and the delay means are provided. Therefore, it is possible to flexibly cope with differences in connection methods between devices. The sink can be automatically adjusted at all times.
- FIG. 1 is a block diagram showing a configuration of an audio / video processing system according to a first example of the present invention.
- FIG. 2 is a block diagram showing a configuration of an audio / video supply device (DVD player) according to the first embodiment.
- FIG. 3 is a block diagram showing configurations of an image processing device and a digital TV according to the first embodiment.
- FIG. 4 is a block diagram showing a configuration of a sound processing apparatus (AV amplifier) according to the first embodiment.
- FIG. 5 is a flowchart showing an operation procedure of the video / audio processing system according to the first example.
- FIG. 6 is a sequence showing an operation procedure of the audio / video processing system according to the first example.
- FIG. 7 is a sequence showing a modified example of the operation procedure of the video / audio processing system according to the first example.
- FIG. 8 is a sequence showing a modified example of the operation procedure of the video / audio processing system according to the first example.
- FIG. 9 is a block diagram showing a configuration of an audio / video supply device (DVD player) according to a second embodiment.
- FIG. 10 is a block diagram showing a configuration of an audio processing apparatus (AV amplifier) according to a second embodiment.
- AV amplifier audio processing apparatus
- FIG. 11 is a flowchart showing an operation procedure of the audio / video processing system according to the second example.
- FIG. 12 is a sequence showing an operation procedure of the audio / video processing system according to the second embodiment.
- FIG. 13 is a sequence showing a modified example of the operation procedure of the video / audio processing system according to the second example.
- FIG. 14 is a data format showing a configuration of a “delay information acquisition request” transmitted / received in an image / audio processing system according to a modified example.
- FIG. 15 is a table showing the definition in the DELAY TIME Command field of the data format of FIG.
- FIG. 16 is a table showing definitions in the subfonction field of the data format in FIG.
- FIG. 17 is a data format showing the configuration of the interface-information field (video and audio) in the data format of FIG.
- FIG. 18 is a table showing definitions in the interface_type field of the data format in FIG.
- FIG. 19 is a data format showing a configuration of a “delay information acquisition response” transmitted / received in the audio / video processing system according to the modification.
- FIG. 20 is a table showing definitions in the signaLstatus field of the data format in FIG.
- FIG. 21 is a sequence showing an operation procedure of the audio / video processing system according to “delay information acquisition request” and “delay information acquisition response” having the data formats of FIGS. 14 and 19.
- FIG. 22 is a sequence showing an operation procedure of the image / sound processing system by “delay information acquisition request” and “delay information acquisition response” having a Notify Command data format.
- FIG. 23 is a block diagram showing a configuration of an audio / video processing system according to a modification.
- FIG. 24 is a sequence showing an operation procedure of the image / sound processing system of FIG. 23 according to “delay information acquisition request” and “delay information acquisition response” having a status command data format.
- FIG. 25 is a block diagram showing a configuration of an image / audio processing system according to a third example.
- FIG. 26 is a block diagram showing a configuration of an audio / video processing system according to a fourth example.
- FIG. 27 is a block diagram showing a configuration of an image / audio processing system according to a fifth example.
- FIG. 28 is a block diagram showing a configuration of an audio / video processing system according to a sixth example.
- FIG. 29 is a block diagram showing a configuration of an audio / video processing system according to Example 7. Explanation of symbols
- FIG. 1 shows the configuration of an image / audio processing system in this embodiment.
- 2, 3 and 4 show specific configuration examples of the image and sound supply device, the image processing device and the sound processing device applied to the image and sound processing system, respectively.
- the audio / video processing system includes a DVD player 100 that reproduces and outputs an image signal and an audio signal as a signal supply source, and an image processing device 200 that performs various processes on the image signal and the audio signal. And an AV amplifier 300, a digital TV (DTV) 400 and a speaker 500 for outputting video and audio.
- a home theater for example.
- the DVD player 100 is connected to the image processing apparatus 200 via the cable 11 and also connected to the AV amplifier 300 via the cable 12.
- the cables 11 and 12 are used for supplying an image signal and an audio signal from the DVD player 100 to the image processing apparatus 200 and the AV amplifier 300, respectively, as an example of the “first transmission path” of the present invention.
- the wiring having such a function is collectively referred to as cables 11 and 12.
- the image processing device 200 is an example of the “image processing device” in the present invention
- the AV amplifier 300 is an example of the “audio processing device” in the present invention.
- the types of the cables 11 and 12 are not particularly limited, and the cable 11 is connected to the DVD player 100.
- the cable 12 is appropriately selected according to the interface type with the image processing apparatus 200, and the cable 12 is appropriately selected according to the interface type between the DVD player 100 and the AV amplifier 300.
- cable 11 conforms to various interface standards corresponding to analog video signals, or standards such as IEEE1394, DVI (Digital Visual Interface) or HDMI (High-Definition Multimedia Interface) corresponding to digital video signals.
- Compliant wiring is used, and the cable 12 is an interface standard that supports analog audio signals, or wiring that conforms to IEEE1394, IEC60958, or the like.
- Each of the cables 11 and 12 may be composed of one or a plurality of cables depending on the signal format that can be passed between the devices.
- the image processing apparatus 200 and the DTV 400 are connected by a cable 11A, and the AV amplifier 300 and the speaker 500 are connected by a cable 12A.
- Cables 11A and 12A may also be appropriately selected depending on the mutual interface type.
- a PDP or a liquid crystal projector is used for the DTV 400, and for example, five speakers and a subwoofer for forming a 5.1 channel surround system are used for the speaker 500.
- the image processing apparatus 200 and the AV amplifier 300 are further connected by a cable 20.
- the cable 20 is an example of the “second transmission path” in the present invention, and is provided for transmitting the image delay information Tdd from the image processing apparatus 200 to the AV amplifier 300.
- the image processing apparatus 200 selects information on the delay of the image signal in the apparatus (that is, the image delay information Tdd) by the characteristic method of the present invention, and passes through the cable 20. Function to send to the AV amplifier 300. Since the AV amplifier 300 is separate from the image processing apparatus 200, the image delay information Tdd cannot be known if the system has a normal configuration.
- the AV amplifier 300 is configured to perform the delay of the audio signal by the delay buffer 303 based on the image delay information Tdd and the audio delay information Tda held by the AV amplifier 300. Yes.
- the AV amplifier 300 is used as a final image / sound synchronization means, and the above-described delay of the sound signal is performed in parallel with each process for outputting the image / sound, thereby obtaining an image.
- the delay of the image signal accompanying the processing is compensated.
- the cable 20 for example, Wiring conforming to IEEE1394, DVI or! Or HDMI is used.
- the cable 20 is provided separately from the cables 11 and 12 as described above, and thus has an advantage that it is not necessary to consider the interface type of the cables 11 and 12 at all.
- the transmission path by the cable 20 is established separately from the transmission path (cables 11 and 12) for transmitting image signals and audio signals. The degree of freedom of connection is guaranteed as before.
- the image delay information Tdd can be transmitted from the image processing apparatus 200 to the AV amplifier 300 via the cable 11 or 12.
- most image processing devices equipped with digital tuners are equipped with IEEE1394 terminals recently, and high-end AV amplifiers equipped with IEEE1394 terminals are increasing. Therefore, if the AVZC command related to the image delay information Tdd is implemented on both sides, and then the two are connected via IEEE1394, the transmission path using cable 20 can be realized by only slightly modifying the existing infrastructure. can do.
- a DVD player 100 includes a DVD reproducing unit 101 that reproduces image data and audio data, an encoding unit 102 that encodes image data in accordance with the MPEG system, and encoded image data and DVD reproduction.
- Multiplexer (MUX) 103 that packet-multiplexes the audio data from unit 101 to generate stream data (MPEG-TS), and the audio data is output from MUX 103 with delay until the time specified by PTS and DST.
- Delay buffer 104 that generates data (A & M) synchronized with stream data and IEEE1394
- the interface (IZF) unit 105 for transmitting to the cables 11 and 12 and the control unit 106, which also has CPU power, performs delay time setting for the delay buffer 104, which will be described later, and performs overall control.
- Operation unit 107 for controlling external force, display unit 108 for displaying operation status and operation commands, etc., and digital / analog (DA) conversion for image data and audio data for analog output DA converter (DAC) 109.
- the DVD player 100 is provided with a plurality of external connection portions 150 such as adapters for connecting to the cables 11 and 12.
- the image processing apparatus 200 includes an IZF unit 201 for receiving data transmitted by the MPEG-TS system via the IEEE1394 cable 11 or 20, and an image stream and audio stream power.
- a demultiplexer (DEM UX) 202 that extracts a stream; a decoding unit 203 that decodes an MPEG-encoded image stream to generate image data; and an image processing unit 204 that performs image processing on the image data
- a / D converter 205 that performs analog-to-digital (AD) conversion on analog input image signals, a control unit 206 that performs overall control, such as a CPU, and delay information that stores image delay information Tdd
- the image processing apparatus 200 is provided with a plurality of external connection parts 250 such as adapters for connecting to the cables 11 and 20.
- the external connection section 250 corresponds to a specific example of “image acquisition means” of the present invention.
- the DEMUX 202, the MPEG decoding unit 203, the image processing unit 204, and the AD converter 205 correspond to a specific example of “image processing means” of the present invention.
- the image processing unit 204 is configured to perform high-quality processing such as three-dimensional YZC separation, noise reduction, contour correction, and resolution conversion, and pre-processing thereof, on the image data.
- the processing contents of the image processing unit 204 differ depending on the format of the image signal to be processed. For example, a composite 'video signal like a normal television signal requires YZC separation and color signal demodulation, but a component video signal is already converted to RGB. Therefore, it is only necessary to apply digital high image quality processing directly.
- the subsequent processing is different. As described above, in the image processing apparatus 200, the processing content changes according to the format of the image signal. If the processing contents are different, the delay amount also changes accordingly. Consequently, there are a plurality of delay amounts in the entire image processing apparatus 200 depending on the format of the image signal.
- the delay information memory 207 as an example of the “storage unit” of the present invention, a plurality of pieces of image delay information Tdd divided according to such processing procedure are stored in advance in a state corresponding to the processing procedure such as a table. Stored.
- the image delay information Tdd is information that serves as an index of lip sync, which will be described later.
- the time delay before and after various processing of the image signal in the image processing apparatus 200 or the image signal is input to and output from the image processing apparatus 200. It can be appropriately set as a time lag that occurs or a relative time lag with respect to the audio signal. For example, when the delay in the image processing unit 204 is most noticeable, the delay amount corresponding to the image processing procedure in the image processing unit 204 can be used as the image delay information Tdd.
- the image processing information Tdd may completely correspond to the processing content on a one-to-one basis, but the size of the delay amount may be divided for each stage. In this case, how much the image delay amount Td d is divided is a design matter, and may be appropriately set according to the processing content, the accuracy of the lip sync, and the like. If the delay can be ignored, set the delay amount to zero as the image processing information Tdd according to the subsequent control method, or set the delay storage information Tdd not to be sent. Moyo!
- control unit 206 has a function to determine the processing procedure being executed from the path of the image signal when the image processing apparatus 200 operates. A function of selecting image delay information Tdd corresponding to the processing procedure from the delay information memory 207; Further, the control unit 206 has a function of sending the selected image delay information Tdd to the cable 20 through the IZF unit 201.
- the series of determination, selection, and sending operations may be periodically executed based on the clock of the control unit 206 itself, or a signal path change (that is, switching of a processing procedure) is performed by the determination operation. It may be detected, and this may be selected as a trigger to perform a sending operation. Each of these actions can be performed based on other timing controls. That is, here
- the control unit 206 is a specific example of the “determination unit” and “selection unit” of the present invention.
- the ZF unit 201 constitutes a specific example of the sending means of the present invention.
- the DTV 400 includes a drive circuit 304 that converts image data input from the image processing apparatus 200 via the cable 11 A into a drive signal, and a display panel unit 402 that is driven by the drive circuit 401. .
- the AV amplifier 300 includes an IZF unit 301 for receiving data transmitted by the A & M method via the IEEE1394 cable 11, and an analog “digital ( AD conversion 302 that performs AD conversion, a delay buffer 303 that delays audio data, an audio processing unit 304 that performs audio processing on audio data, and a DA converter (DAC) 305 that converts audio data to analog And a voice control unit 306 for controlling the components of the voice signal, and the like, and the CPU is set to set the delay time for the delay buffer 303, and the control unit 307 for overall control and the control unit 307 from the outside.
- An operation unit 308 for controlling and a display unit 309 for displaying an operation status, an operation command, and the like are provided.
- the AV amplifier 300 is provided with a plurality of external connection portions 350 such as adapters for connecting to the cables 12 and 20.
- these external connection units 350 correspond to a specific example of “audio acquisition means” of the present invention.
- the audio processing unit 304, the DAC 305, and the audio control unit 306 correspond to a specific example of “audio processing means” of the present invention.
- the control unit 307 has a function of receiving the image delay information Tdd from the cable 20 through the IZF unit 301. Furthermore, the control unit 307 holds in advance audio delay information Tda related to the delay of the audio signal by the audio processing device 300, and based on the received image delay amount Tdd and audio delay information Tda when the audio processing device 300 operates. It has a function of determining the delay amount for the audio signal and controlling the audio delay operation by the delay buffer 303.
- control unit 307 and the IZF unit 301 are specific examples of the “reception unit” of the present invention
- control unit 307 and the delay buffer 303 are specific examples of the “delay unit” of the present invention.
- Example It is made.
- the memory similar to the delay buffer 303 also includes a normal AV amplifier. These can memorize (can be delayed) audio signals of about 200 msec. However, normal AV amplifiers are configured to perform audio delay manually. Therefore, the AV amplifier 300 of this embodiment is configured to automatically delay the audio by setting the delay amount of the delay buffer 303 by the control unit 307.
- Figure 5 shows the operating procedure for lip sync on this system.
- Fig. 6 shows the operation of each device.
- the image / audio processing system basically performs various processing on the image signal and the audio signal reproduced by the DVD player 100 by the image processing device 200 and the AV amplifier 300, respectively, so that the DT V400 and the speaker 500 are processed. A series of operations are performed to obtain video and audio output.
- the audio data reproduced by the DVD reproducing unit 101 is branched and input to the delay buffer 104, and delayed by the delay due to the compression of the video data output in the MPEG-TS format. Therefore, this audio data is synchronized with the image data in the MPEG format at the output stage, and when these are used for output, the video signal and the audio signal due to the delay element in the DVD player 100 are used. It is not necessary to take into account the time lag (however, synchronization processing at this stage is not always necessary. If the ratio of components due to image processing to the total delay amount is large, or the second implementation described below. The example does not take this configuration).
- the DVD player 100 outputs the image data, the image signal to the cable 11 and the audio data! /, The audio signal to the cable 12 via the interface unit such as the iZF unit 105.
- the interface unit such as the iZF unit 105.
- an image signal without image data is acquired from the cable 11 via an interface unit such as the IZF unit 201.
- the DEMUX 202 and the MPEG decoding unit 203 perform preprocessing as the signal obtained by the image processing unit 204.
- decoding is necessary, in the case of an image signal acquired as an analog signal, it is necessary to perform AD conversion by the AD converter 205.
- there are various signal formats for image data and the processing contents in the image processing unit 204 differ accordingly. In other words, in the image processing apparatus 200, the processing procedure is divided according to the format of the acquired image data! / Falsification image signal, and the image data or the image signal passes through a path corresponding to that. Receive the necessary processing.
- step S11 when the control unit 206 detects, for example, such a change in the path of the image data or the image signal as “switching of processing procedure” (step S11: Yes), this is performed.
- the processing procedure being executed is determined (step S12).
- This switching of the processing procedure is based on a change in the signal processing path in the image processing apparatus 200 due to a user operation (for example, including a control signal from the outside such as a remote control) or an interrupt signal from the LSI. Is detected as a change in the image signal.
- the control unit 206 further determines the current processing procedure using such a change in the signal path or a change in the signal format as a trigger for executing the operation related to the delay information thereafter. If the switching of the processing procedure is not detected (step S11: No), the control unit 206 does not operate according to the delay information.
- the control unit 206 refers to the delay information memory 207 and uniquely selects the image delay information Tdd corresponding to the determined processing procedure (step S13).
- the image delay information Tdd for example, when the processing procedure is taken, the time until the image signal is added to the image processing apparatus 200 and output (that is, the delay amount by the image processing apparatus 200). ) In advance in the delay information memory 207.
- other parameters can be used for the image delay information Tdd.
- control unit 206 sends the image delay information Tdd obtained by selecting the transfer to the AV amplifier 300 to the cable 20 through the IZF unit 201 (step S14).
- the AV amplifier 300 audio data or audio signals are acquired from the cable 12 via an interface unit such as the I / F unit 301. Since the signal acquired here is subjected to sound processing by the sound processing unit 304 or the sound control unit 306, the AV amplifier 300 also has a device-specific delay amount. Here, such a delay amount of the audio signal or audio data is stored in advance in the control unit 307 as the audio delay information Tda.
- the control unit 307 receives the image delay information Tdd from the cable 20 via the iZF unit 301 (step S 15). The control unit 307 determines whether or not the received image delay information T dd is different from the current set value (step S16).
- step S16: Yes If the received image delay information T dd is different from the current set value (step S16: Yes), this received Based on the image delay information Tdd and the own audio delay information Tda, the setting of the delay amount (Tdd + Tda) in the delay buffer 303 is updated (step S17). When the received image delay information Tdd is the same as the current set value (step S16: No), the subsequent operation is not executed.
- the delay buffer 303 delays the audio data based on the delay amount (Tdd + Tda) set in the control unit 307 in this way (step S18).
- This series of processing is performed in parallel with normal signal processing related to image and sound while the image and sound processing system outputs image and sound, for example.
- the AV amplifier 300 functions as a final video / audio synchronization means, and the delay of the video signal is compensated.
- this image / audio processing system can automatically realize so-called lip sync that synchronizes the image output by the image processing apparatus 200 and the audio output by the AV amplifier 300.
- the image processing apparatus 200 reviews the image delay information Tdd over time, the delay amount of the audio data in the AV amplifier 300 can always be appropriately set.
- a normal AV amplifier is configured to manually adjust the delay amount of the audio delay memory.
- users who are difficult to make accurate adjustments often give up even if they feel a little uncomfortable.
- the delay amount of the image changes every time the reproduction signal source is switched, there is an inconvenience when it is necessary to readjust each time.
- the audio / video processing system in the present embodiment can solve such problems and can provide a comfortable specification environment.
- the interface type of cable 20 is determined separately from cables 11 and 12, so image delay information Tdd can be easily sent and received without sacrificing the flexibility of the interface type of cables 11 and 12. it can. Therefore, this system is It has high versatility with very few restrictions on the face format.
- the image processing device 200 and the AV amplifier 300 can be realized only by slightly modifying the normal configuration, and have high versatility.
- the power described for the case where the image processing apparatus 200 actively sends the image delay information Tdd to the AV amplifier 300 is used instead of or instead of the transmission request of the AV amplifier 300. Accordingly, the system may be configured to passively send the image delay information Tdd. Below, such a modification is shown.
- the AV amplifier 300 can be configured to inquire about the image delay information Tdd, triggered by such switching of the source device.
- control unit 307 sends an image delay information acquisition request for the image processing apparatus 200 to the cable 20 through the I ZF unit 301.
- control unit 206 receives an image delay information acquisition request from cable 20 through IZF unit 201. Then, with the reception of this image delay information acquisition request as a discount, the image delay information Tdd is sent back as an image delay information acquisition response. Thereafter, the same operation as in the first embodiment can be performed.
- the delay amount of the image signal changes, so that Re-adjustment of the sink is necessary. That is, in the multi-screen display, the delay amount of the image signal may differ depending on the screen. This is because a normal display driver has only one set of high image quality circuits and can only support one screen.
- the image delay information T is also changed by switching the audio during multi-screen display. dd will change. Such a change in the image delay information Tdd can be detected from, for example, monitoring by polling.
- the AV amplifier 300 polls the image processing apparatus 200 using the image delay information acquisition request.
- the image processing apparatus 200 sends back the image delay information Tdd as an image delay information acquisition response each time an image delay information acquisition request is received.
- the AV amplifier 300 does not particularly operate with respect to the delay amount unless the image delay information Tdd is changed in the previous polling power.
- the audio signal is handled.
- a change occurs in the image signal.
- the image processing apparatus 200 sends back image delay information Tdd different from the previous one.
- control unit 307 detects a change in image delay information Tdd from the previous polling and updates the delay amount (Tdd + Tda). Then, the delay buffer 303 delays the audio data based on the updated delay amount (Tdd + Tda).
- the AV amplifier 300 is configured to refer to the image delay information Tdd exclusively as the delay information of the external device.
- the delay information Tdp from the DVD player 100 is used.
- the basic configuration of the image and sound processing system in this embodiment is the same as that in the first embodiment. Therefore, in this embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted as appropriate.
- the image / audio processing system of this embodiment is configured by replacing the DVD player 100 and the AV amplifier 300 in the image / audio processing system of the first embodiment with a DVD player 100A and an AV amplifier 300A, respectively.
- the DVD player 100A eliminates the delay buffer 104 and
- the DVD player 100 is different from the DVD player 100 in that a delay information memory 110 that stores the total information Tdp in advance is connected to the control unit 106.
- the AV amplifier 300A is configured to compensate for the signal delay caused by the DVD player 100A, it is not necessary to synchronize the image and the sound in the DVD player 10OA.
- control unit 106 has a function of discriminating the processing procedure during execution of the path force of image data and audio data during the operation of the DVD player 100A, and the signal delay information Tdp corresponding to the discriminated processing procedure. Has a function of selecting from the delay information memory 110.
- the signal delay information Tdp is a time lag between the image data and the audio data in the DVD player 100A. This time lag can be obtained as a difference between the delay amounts from the processing paths of image data and audio data.
- the information stored in the delay information memory 110 can take other various forms.
- the delay amount of the image data and the delay amount of the audio data may be stored in association with each processing procedure.
- the signal delay information Tdp may be the delay amount of the selected image data and the delay amount of the audio data, or may be the difference between these two delay amounts! /.
- the control unit 106 has a function of transmitting the selected signal delay information Tdp to the cable 12 through the IZF unit 105. That is, the DVD player 100A power constitutes an example of the “image / sound supply device” of the present invention.
- the DVD playback unit 101 is the “reproduction unit” of the present invention
- the MPEG encoding unit 102, the MUX 103 and the DAC 109 are the “signal processing unit” of the present invention
- the external connection unit 150 is the “supply unit”.
- the memory 110 is the “storage means”
- the control unit 106 is the “determination means” and “selection means” of the present invention
- the control unit 106, the IZF unit 105 and the external connection unit 150 are the “sending means” of the present invention Each corresponds.
- the cable 12 corresponds to the “third transmission line” of the present invention.
- the image processing apparatus 200 replaces the image delay information Tdd with the image delay information Tdd 'as the image delay information Tdd' and the image data (an image signal) and the audio data (N , And the audio signal) is configured to generate a time lag.
- the AV amplifier 300 A receives the signal delay information Tdp from the cable 12 through the IZF unit 301.
- the control unit 307 performs signal delay information acquired from the outside. Based on the information Tdp and the image delay information Tdd 'and its own audio delay information Tda, the delay amount (Tdp + Tdd' + Tda)) in the delay buffer 303 is set! RU
- FIG. 11 shows the operating procedure for lip sync on this system.
- Fig. 12 shows the operation of each device.
- the DVD player 100 image data and audio data reproduced by the DVD reproducing unit 101 are subjected to processing such as compression in accordance with the output format.
- processing such as compression in accordance with the output format.
- the delay amount of the output signal from the DVD player 100A differs depending on the signal format (processing procedure). For example, if the video output is switched from analog to digital, the amount of delay changes significantly.
- the audio data compression method differs depending on the surround format such as Dolby Digital or DTS, which may cause a change in the delay amount of the audio signal.
- the device is a device such as a Blu-ray recorder Z player and the player decodes and outputs an image signal
- the image can be reproduced if there is a change in the image signal to be played (for example, switching from HD to SD).
- the amount of delay may vary depending on the data format.
- step S21 when the control unit 106 detects, for example, such a change in the path of the image data or the image signal as “switching of the processing procedure” (step S21: Yes), this is tight.
- the processing procedure being executed as a hook is determined (step S22). This switching of the processing procedure depends on the change in the signal processing path in the DVD player 100 (for example, including a control signal from the outside such as a remote control) by the user's operation or an interrupt signal from the LSI. Is detected as a change in signal.
- the control unit 106 further determines the current processing procedure using such a change in the signal path or a change in the signal format as a trigger for executing the operation related to the delay information thereafter. If the switching of the processing procedure is not detected (step S21: No), the control unit 106 does not perform the operation related to the delay information.
- control unit 106 refers to the delay information memory 110 and uniquely selects a signal delay amount corresponding to the determined processing procedure (step S23).
- the delay amount of image data and the delay amount of audio data in the DVD player 100A are stored in the delay information memory 110 in advance. Keep it.
- the control unit 106 selects delay amounts corresponding to the current processing procedure powers of image data and audio data, and sets the difference as signal delay information Tdp.
- control unit 106 sends the signal delay information Tdp obtained to be transferred to the AV amplifier 300 to the cable 12 through the I ZF unit 201 (step S24). Further, the image processing device 200 sends the image delay information Tdd ′ to the AV amplifier 300A in the same manner as in the first embodiment.
- the AV amplifier 300 receives the signal delay information Tdp from the cable 12 via the control unit 307 force iZF unit 301 (step S25).
- the control unit 307 determines whether or not the received signal delay information Tdp is different from the current set value (step S26), and if it is different from the current set value (step S26: Yes), the delay in the delay buffer 303 is determined.
- the setting of the quantity (Tdp + Tdd, + Tda) is updated (step S27). If the received signal delay information Tdp is the same as the current setting value (step S26: No), the subsequent operation is not executed.
- this update process may not be performed.
- the delay buffer 303 delays the audio data based on the delay amount (Tdp + Tdd ′ + Tda) set in the control unit 307 in this way (step S28).
- control unit 307 also receives the image delay information Tdd 'from the cable 20 in the same manner as in the first embodiment.
- the setting of the delay amount (Tdp + Tdd ′ + Tda) is updated when the current setting value is different. That is, the AV amplifier 300 in this case resets the delay amount in accordance with notifications output from the DVD player 100 and the image processing apparatus 200, respectively.
- the AV amplifier 300 functions as a means for synchronizing the final image and sound, and not only the image processing device but also the signal delay by the DVD player 100A as the signal source is taken into account, so Can perform well.
- the signal delay information Tdp is transmitted by the cable 12.
- a cable for transmitting the signal delay information Tdp is separately provided between the DVD player 100A and the AV amplifier 300A. You may make it provide. This will increase the general versatility of the system.
- the system may be configured to passively transmit the signal delay information Tdp and the image delay information Tdd ′ in response to the transmission request of the AV amplifier 300! / ⁇ . Below, such a modification is shown.
- the AV amplifier 300A uses the switching of the source device as a key to avoid signal delay information Tdp and image delay information Tdd. Can be configured to ask and match '.
- control unit 307 separately sends a signal delay information acquisition request for the DVD player 100A and an image delay information acquisition request for the image processing device 200 to the cable 12 and the cable 20 through the IZF unit 301. To send.
- the control unit 106 receives the signal delay information acquisition request from the cable 12 through the IZF unit 105.
- the DVD player 100A always retains the delay amount or the signal delay information Tdp in the control unit 106 while the processing procedure is switched or updated at a predetermined cycle.
- control unit 106 sends back signal delay information Tdp as a signal delay information acquisition response, triggered by reception.
- the image processing apparatus 200 sends an image delay information acquisition request, and the control unit 206 passes the IZF unit 201. Receive from cable 20.
- the image processing apparatus 200 also always holds the delay amount or the image delay information Tdd ′ in the control unit 206 while the processing procedure is switched or updated at a predetermined cycle.
- the control unit 206 sends back the image delay information Tdd ′ as an image delay information acquisition response, triggered by the reception.
- the AV amplifier 300A sends a delay information acquisition request to each device triggered by switching of the source device, that is, switching of the audio signal to be processed.
- the delay information acquisition request may be periodically transmitted by polling or the like. Even when delay information is monitored by polling, it may be updated every time delay information is acquired, but in this case as well, the delay amount is compared only when there is a change between the acquired delay information and the previous amount. Let's do the update process.
- an image delay information acquisition request or a signal delay information acquisition request is related to a DELAY TIME indicating an opcode (opcode) of a definition command, a subfonction indicating a secondary function for the opcode, and transmission / reception of an image signal. It consists of video_interface_information indicating information and audiojnterfacejnformation indicating information related to transmission / reception of image signals. Note that the operand [5] and [6] field values are set to FF in this case.
- the AV / C command has command types of Control command, Status command, and Notify command, but the DELAY TIME command shown in Fig. 15 is defined only for the Status command and Notify command. Images that need to be lip-synced Devices in the audio processing system need to implement the DELAY TIME command. Force Other devices need not be implemented. In this sense, the DELAY TIME support level is optional!
- sublunction is a field that indicates a secondary function for the opcode.
- INPUT and OUTPUT are defined as shown in Figure 16. This allows the receiving side to recognize the connection relationship on the system with the information transmission source.
- INPUT is As a sink device on the system
- OUTPUT is configured as a source device on the system.
- interface-type is a field that indicates the physical connection format between the receiving I ⁇ i rule and the transmission source. For example, as shown in Fig. 18, it is configured to identify various connection methods such as IEEE1394 and HDMI. Is done. signaLstatus is a field that indicates the status of signal processing when requesting acquisition of the delay amount. In the delay information acquisition request, the value is set to FF. By the way, signal status was able to confirm the delay amount
- a response to such a delay information acquisition request can be described as follows.
- the image delay information acquisition response or the signal delay information acquisition response is a specific example of “image delay information” and “signal delay information” of the present invention, respectively, and the definition command opcode (opcode) DELAY TIME indicating the sub-function for the operation code, video_interface_information indicating information related to transmission / reception of the image signal, audio_interface_information indicating information related to transmission / reception of the image signal, and delay_time_difference.
- the delay amount is written in delay_time_difference which was empty in the delay information acquisition request. For example, in delay_time_difference, the difference value between the delay amount of the image signal and the delay amount of the audio signal in the device that received the request is written as the delay amount.
- signaLstatus corresponds to a specific example of “processing status information” of the present invention! /.
- the AV amplifier 300A that is the transmission source of the delay information acquisition request receives the delay information acquisition response, so that the delay information is transmitted to the target device in addition to the delay amount.
- the power of information at any input / output terminal It is possible to obtain peripheral information such as the signal path and signal processing status at the input / output terminal. And these If the amount of delay of the audio signal in the delay buffer 303 is set by utilizing the peripheral information, the lip sync can be performed with high accuracy.
- FIG. 21 shows a request Z response by status command in the system operation of FIG.
- the AV amplifier 300A sends a DELAY TIME Status Command to the DVD player 100A and the image processing apparatus 200.
- the DELAY TIME Status Command for the DVD player 100A has subfonction power ⁇ OUTPUT
- the interface_type for the image signal ie, video_interface_information
- the interface_type for the audio signal that is, audio_interface_information
- the DELAY TIME Status Command for the image processing apparatus 200 is subfonction force NPUT
- the interface_type for the image signal is HDMI
- the interface_type for the audio signal is ignore. That is, since there is no audio signal connection in the image processing apparatus 200, this field is ignored.
- the DVD player 100A and the image processing device 200 each send a DELAY TIME Status Response to the AV amplifier 300A.
- signaLstatus during video signal processing ie, video_interface_information
- signal-status bproc essing during audio processing ie, audio-interface-information
- signaLstatus at the time of image signal processing is processing ⁇
- signal-status at the time of audio f3 ⁇ 4 processing is don't care.
- the delay amount of del ay_time_difference is 80msec. This indicates that in the image processing apparatus 200, the image signal is relatively delayed by 80 msec from the audio signal.
- the AV amplifier 300A confirms that the delay amount has been correctly acquired, and as a contribution of the DVD player 100A and the image processing device 200 to the delay amount of the image signal with respect to the audio signal. 70msec is recorded.
- FIG. 22 shows a state of a request Z response by a notify command in the system operation of FIG.
- the AV amplifier 300A sends a DELAY TIME Notify Command to the DVD player 100A and the image processing device 200. It is assumed that the AV amplifier 300A has previously received a response from the DVD player 100A that the delay amount of delay_time_difference is 10 msec (see, for example, the third modification).
- the DVD player 100A and the image processing device 200 respectively send a DELAY TIME Notify Response to the AV amplifier 300A.
- DELAY TIME Notify Response also sends each device power to notify that the request has been received.
- Each device sends a DELAY TIME Notify Response for the time being, and then returns a DELAY TIME Notify Response again when it is determined that the delay amount has changed internally.
- the DVD player 100A notifies that the request has been received.
- TIME Notify Response (INTERIM) Only TIME Notify Response (INTERIM) is sent, and then no response is made because there is no change in the delay amount in the device.
- the image processing apparatus 200 first sends a DELAY TIME Notify Response (INT ERIM) notifying that the request has been received.
- INT ERIM DELAY TIME Notify Response
- the image delay amount is selected as described above, and based on this, the image delay information Tdd is generated as the DELAY TIME Notify Response (CHANGED).
- CHANGED DELAY TIME Notify Response
- the signaLstatus in the image signal processing is proc essing.
- the signaLstatus in the sound signal processing is don't care.
- the delay amount of delay_time_difference is 100 msec. This indicates that in the image processing apparatus 200, the image signal is relatively delayed by 100 msec from the audio signal.
- the AV amplifier 300A confirms that the delay amount has been acquired correctly. In both cases, 90 msec is counted as the contribution of the DVD player 100A and the image processing device 200 to the delay amount of the image signal relative to the audio signal.
- the AVZC command is implemented as a notify command.
- notify comm and indicates whether the device (here, DVD player 100A and image processing device 200) that received the notify command issued by the device requesting notification (here, AV amplifier 300A) accepts the notification request.
- the device requesting notification here, AV amplifier 300A
- these receiving devices notify the changed information by a response again.
- the video / audio processing system includes an AV amplifier 300B and a TV receiver 160.
- the TV signal received by the internal tuner is separated into an image signal and an audio signal, and the image signal is processed by the TV receiver 160 itself and transmitted to the panel 150a.
- the separated audio signal is supplied to the AV amplifier 300B. That is, the TV receiver 160 corresponds to a specific example of the “image processing device” and “image / sound supply device” of the present invention.
- the AV amplifier 300B and the TV receiver 160 are connected by the cable 21 based on IEEE1394 or HDMI. That is, the cable 21 corresponds to specific examples of the “first transmission path”, the “second transmission path”, and the “third transmission path” of the present invention. However, a cable for sending the delay information on the TV receiver 160 side to the AV amplifier 300B may be prepared separately from the audio signal supply cable.
- the operation related to the delay information in the video / audio processing system can be realized by using a command, for example.
- the AV amplifier 300B is, for example, a TV receiver 16 under the control of the control unit 307.
- the AV amplifier 300B sends a DELAY TIME Status Command to the TV receiver 160.
- the DELAY TIME Status Command for the TV receiver 160 is subfonction power ⁇ OUTPUT, the image signal (ie, video—interface—information), the interf ace—type is ignore, and the audio signal (ie, audio— interface—type of interface—information is IEEE1394.
- the TV receiver 160 sends a DELAY TIME Status Response to the AV amplifier 300B.
- signaLstatus is “don't care” when image signal processing is performed.
- delay The delay of time_difference is 80 msec. This means that in the TV receiver 160, the image signal is delayed by 80 msec relative to the audio signal.
- the AV amplifier 300B confirms that the response power delay amount has been acquired correctly, and records 80 msec as a contribution of the TV receiver 160 to the delay amount of the image signal with respect to the audio signal.
- the system is constructed by using a plurality of cables in which the devices are connected one-to-one.
- the transmission path of the present invention can be constructed as a network.
- FIG. 25 as an example of such a case, DVD player 100, image processing apparatus 2
- serial bus 30 corresponds to the “first transmission path”, “second transmission path”, and “third transmission path” of the present invention.
- the transmission path of the present invention can take a connection form other than the network.
- a DVD player 100 and an AV amplifier 300 are connected via HDMI 40a, and AV amplifier 300 and image processing apparatus 200 are connected via HDMI 40b.
- the AV amplifier 300 retransmits the image signal received from the DVD player 100 to the image processing apparatus 200.
- signals can be transmitted and received between multiple devices even with a one-to-one connection.
- the HDMIs 40a and 40b correspond to the “first transmission path”, “second transmission path”, and “third transmission path” of the present invention.
- DVD players 100a and 100b are connected to an image processing device 200 and an AV amplifier 300, respectively.
- the image processing device 200 and the AV amplifier 300 receive the signal only from one of the DVD players 100a and 100b, and the supply destination of the signal can be specified.
- the AV amplifier 300 since the AV amplifier 300 establishes a connection by selecting one of the DVD players 100a and 100b with the Input Selector, the AV amplifier 300 can be operated without any particular problem without causing any confusion between devices. Therefore, the AV amplifier 300 can definitely acquire the signal delay information Tdpl or Tdp2 from the DVD player 100a and 10 Ob which is the current signal source.
- image processing apparatuses 200a and 200b are connected to a DVD player 100.
- the image processing apparatuses 200a and 200b are connected to additional U displays 400a and 400b, respectively.
- Specific embodiments include a projector of a PDP and a projector, or a liquid crystal panel installed separately on a front seat side and a rear seat side in an automobile.
- AV amplifiers 300a and 300b are connected to the DVD player 100.
- the AV amplifiers 300a and 300b are connected to additional U audio output devices 500a and 500b, respectively.
- Specific embodiments include speakers and headphones.
- the AV amplifiers 300a and 300b are independently driven and can acquire delay information individually, so that they can operate without any particular problem.
- the present invention is not limited to the above-described embodiments and modifications thereof, and can be appropriately modified within the scope of the claims and the gist or idea of the invention that can be read from the entire specification.
- An image processing apparatus, an audio processing apparatus, an image / audio supply apparatus, an image / audio processing system, and an image / audio synchronization method are also included in the technical idea of the present invention.
- the information stored in the delay information memory 207 and the delay information memory 110 may include information used for delay compensation in addition to the delay amount. .
- the signal delay information which is the image delay information acquired from the delay information memory
- the selection time of the signal delay information, the image processing device or the DVD player Information used for delay protection, such as the signal processing status in the system, the connection path between the AV amplifier and the image processing apparatus in the system, and the DVD player, may be included.
- the delay amount is stored in the delay information memory 207 or the delay information memory 110, and when one of them is selected, the difference ⁇ Tdd or ⁇ Tdp with the previously selected delay amount
- the delay information is Tdd
- the signal delay information is Tdp.
- the audio delay information Tda held by the AV amplifier 300 may be uniquely determined. However, a plurality of the same as the image delay information Tdd and the signal delay information Tdp are prepared and appropriately selected. You may make it do. Also in audio processing, the required processing differs slightly depending on the format of the acquired audio signal. For example, since the compression method of audio signals differs depending on the surround format, the decoding method also differs. The signal may be processed to give. In other words, the processing procedure for audio processing may differ depending on the signal format, and there may be a plurality of audio signal delay amounts (ie, audio delay amounts). In such a case, it is preferable that the audio processing apparatus is also configured to determine the processing procedure being executed and select the stored information power for the audio delay amount corresponding to the determined processing procedure.
- the extended information generating means or the signal delay information generating means may measure the signal delay in the process being executed every time a request from a clock having a predetermined period or a sound processing apparatus is received.
- the devices are connected by cables, but the transmission path of the present invention may be any communication medium.
- You can use a wireless system such as IEEE802.11e wireless LAN (wireless local area network) or Bluetooth (R) for connection between devices!
- the image processing device, the sound processing device, the image / sound supply device, the image / sound processing system, and the image / sound synchronization method according to the present invention flexibly cope with the difference in the connection method between devices, and For example, it can be used for various devices such as AV amplifiers that can always be automatically adjusted.
Abstract
Description
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