JP2006340250A - Reproducing-device readable recording medium, video and voice signal generator, voice output device, synchronization adjusting system, and synchronization adjusting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simply adjust the synchronization between the video image of a display device such as a plasma display device and the output voice of a voice output device such as an audio amplifier. <P>SOLUTION: A disk reproducing device 2 reproduces a reproducing-device readable recording medium 1 that records a plurality of reproduction data having common moving images and common voice, and also, having mutually different reproduction delay amounts of the voice to the moving images. The plasma display device 3 displays the moving images. The audio amplifier 4 outputs the voice, and also, displays a value of the reproduction delay amount. When a value is inputted in the reproduction delay amount to be displayed on an input 26 of the audio amplifier 4, the audio amplifier 4 outputs the voice signal by delaying it with the inputted value. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a playback device-readable recording medium, a video and audio signal generation device, an audio output device, a synchronization adjustment system, and a synchronization adjustment method.

  Patent Document 1 discloses a time difference measuring apparatus for a television video signal and an audio signal. The time difference measuring apparatus disclosed in Patent Document 1 uses a television video signal and an audio signal generated at the same time when they are transmitted or processed via different transmission paths or signal processing circuits and then used for monitoring. It measures the arrival time difference between the video signal and the audio signal.

  The time difference measuring apparatus disclosed in Patent Document 1 includes means for obtaining television video and audio based on a television video signal and an audio signal, respectively, in order to measure the arrival time difference between the video signal and the audio signal. An optical-electrical converter for converting a temporal luminance change in a part of the screen of a television image to an electric signal of a corresponding level, and an electric signal obtained by the optical-electrical converter A first waveform shaping circuit for shaping the signal into a binary pulse signal, a first one-pulse generation circuit for generating one pulse from the output of the first waveform shaping circuit, and the obtained television sound. A microphone that converts the electrical signal corresponding to the level of the sound, a differentiation circuit that differentiates the electrical signal obtained by the microphone, and a second waveform that shapes the output of the differentiation circuit into a binary pulse signal Circuit, a second one-pulse generating circuit that generates one pulse from the output of the second waveform shaping circuit, and a gate-on at the output of the first one-pulse generating circuit. A gate circuit that gates off at the output, a counter circuit that measures a period in which the gate circuit is gate-on by counting the number of clock pulses included in the period, and a time display that displays a count result by the counter circuit A vessel.

Japanese Patent Laid-Open No. 10-285483 (claims, detailed description of the invention, etc.)

  Incidentally, in recent years, plasma display devices have been developed and are beginning to spread. Compared with a general liquid crystal display device using a TFT (Thin Film Transistor), the plasma display device has an advantage that a large screen can be easily commercialized. The plasma display device may be used as a home theater system in combination with, for example, an audio amplifier device because of its large screen and high image quality display capability.

  However, when this plasma display device and an audio amplifier device are used in combination, the following problems arise.

  That is, in the plasma display device, the display driver applies a voltage to the address electrode and the display electrode of the plasma light emitting display unit, and generates a plasma discharge in a desired discharge cell with this voltage, and the ultraviolet light accompanying the plasma discharge The phosphor provided in the discharge cell emits light. In addition, the plasma display device converts signals input to the video A / D conversion unit, signal processing unit, display driver, and the like in order to convert the moving image input thereto into control signals applied to the address electrodes and display electrodes of the plasma light emitting display unit. It has a processing system circuit.

  Therefore, in the plasma display device, a large delay time is generated after an analog video signal is input until a display screen based on the signal is displayed. In a plasma display device, a general liquid crystal display device using TFTs has a large delay time that the user does not feel. The delay of the display screen of the plasma display device may be several tens to several hundreds of milliseconds.

  As described above, the plasma display device has a large delay from when a signal is input thereto until the display screen based on the signal is displayed. As a result, when this plasma display device and an audio amplifier device are used in combination, audio is output from the audio amplifier device before the plasma display device displays an image. That is, sound is output ahead of the video. For example, in a scene where two people are fighting, after a sound is heard, a screen on which people are beaten is displayed.

  When the sound lags behind the video, for example, if one imagines that there is a lightning in the distance, the person feels that the scene of the video is unfolded far away, and it is difficult to feel uncomfortable. However, if sound precedes the video, it cannot be in the real world, so even if the degree of advance is very short, it is easy to feel uncomfortable.

  Such a situation can occur more or less in other types of display devices.

  Then, in order to adjust the synchronization between the image of the plasma display device and the sound output from the audio amplifier device so as not to cause such a sense of incongruity, the time difference measuring device as described in Patent Document 1 is used. Must be used to measure the amount of shift between video and audio. Such a time difference measuring device is used only for measuring the value of the amount of deviation between video and audio, and is not something that can be purchased and used by ordinary people.

  The present invention relates to a playback device-readable recording medium, video, and audio that can easily adjust the synchronization between the video of a display device such as a plasma display device and the output audio of an audio output device such as an audio amplifier device. It is an object of the present invention to obtain a signal generator, an audio output device, a synchronization adjustment system, and a synchronization adjustment method.

  The recording medium according to the present invention is a plurality of video data having a common moving image and common sound recorded on the recording medium, and these video data have different audio reproduction timings for the moving image. Reading means for reading out a plurality of video data selection screen data from a recording medium, selection means for selecting one of a plurality of reproduction data based on a user operation, and selection means Reading means for reading the reproduction data selected from the recording medium, moving picture signal generation means for generating a moving picture signal including at least a moving picture based on the reproduction data read by the reading means, and reproduction data read by the reading means , An audio signal generation means for generating an audio signal including at least audio, a display device for displaying a moving image, and Audio output device is connected to output audio, but readable by the reproducing apparatus having a signal output means for outputting to the audio output device an audio signal and outputs to the display device a video signal.

  The recording medium according to the present invention is a plurality of pieces of video information having a moving image and common audio described in the recording medium according to the above-described invention, and the image data includes a delay amount of an audio signal accompanying the image. It is an image to which character display is added as a video.

  The recording medium according to the present invention is a plurality of video information having a moving image and a common sound described in the recording medium according to the above-described invention, and the delay amount of the set audio data is other than an image for the image data. It is included.

  The video and audio signal generation device according to the present invention is selected by the recording medium according to each configuration of the above-described invention, the selection means for selecting one of a plurality of reproduction data based on the user operation, and the selection means Based on the reproduction data read out by the reading means that reads the reproduction data from the recording medium, the moving image signal generation means that generates at least the moving image signal including the moving image based on the reproduction data read by the reading means, Audio signal generating means for generating an audio signal including at least audio, a display device for displaying a moving image, and an audio output device for outputting the audio are connected to output the moving image signal to the display device and the audio signal to the audio output device. And a playback device having signal output means for outputting.

  The audio output device according to the present invention records a moving image and sound in which a sound reproduction delay amount is set in advance with respect to a moving image based on an image in which a character signal display is added as a delay amount of the audio signal accompanying the image described above. A video and audio signal generator for reproducing the recorded recording medium is connected, and information indicating an audio reproduction delay value for an audio signal and moving image including at least recorded audio from the video and audio signal production device; Is input to the signal input means when the selection instruction input means outputs a selection instruction. A setting unit that stores a value of the reproduction delay amount of sound for the moving image as delay data in the storage unit, and an audio signal input to the signal input unit The brute audio signal, and audio signal output means for outputting the delayed in time indicated by the delay data stored in the storage means, and has a.

  A second audio output device according to the present invention includes a video output terminal that outputs a video signal including at least a moving image, a video signal output from the video output terminal, and an analog audio signal output from the audio output device, Signal generating means for adjusting the sound reproduction delay amount in the analog audio signal, display means for displaying the value of the sound reproduction delay amount for the video generated by the signal generating means, and storage means for storing the delay data Numerical value input means for acquiring a numerical value input by the user based on the display of the display means, setting means for storing the numerical value input to the numerical value input means as delay data in the storage means, and input to the signal input means An analog audio signal output based on the audio signal is output after being delayed by the time indicated by the delay data stored in the storage means. Those having a means.

  A third audio output device according to the present invention includes a video output terminal that outputs a video signal including at least a moving image, a video signal output from the video output terminal, and an analog audio signal output from the audio output device. Signal generating means for adjusting an audio reproduction delay amount in an analog audio signal, storage means for storing delay data, selection instruction input means for outputting a selection instruction based on a user operation, and a selection instruction input means A setting means for storing the value of the reproduction delay amount of the sound for the moving image generated by the signal generation means when the selection instruction is output as delay data in the storage means, and an analog signal based on the audio signal input to the signal input means Having analog audio signal output means for outputting an audio signal delayed by a time indicated by delay data stored in the storage means A.

  In the voice output device according to the present invention, in addition to the above-described components of the invention, a numerical value input means or a selection instruction input means is formed separately from the voice output device, and a numerical value or a selection is made according to a user operation. A remote input unit that wirelessly transmits an instruction; and a reception unit that receives a numerical value or a selection instruction transmitted by the remote input unit and outputs a numerical value or a selection instruction based on the reception.

  The audio output apparatus according to the present invention includes a video input terminal to which a video signal including at least a moving image is input, a video signal input to the video input terminal, and a signal generation unit in addition to each configuration of the above-described invention. Video input switching means for selecting one of the video signals and outputting the selected video signal to the video output terminal.

  The synchronization adjustment system according to the present invention includes an audio output device according to the first configuration of the invention described above, an audio output device connected to the audio output device, and an audio signal including at least audio and an audio reproduction delay amount for a moving image. A video and audio signal generator for outputting a video signal including at least a video and a video and audio signal connected to the video and audio signal generator directly or via an audio output device. And a display device that displays a moving image based on a moving image signal including at least the moving image output from the generation device.

  In the synchronization adjustment system according to the present invention, in addition to the configuration of the above-described invention, the video and audio signal generator is the video and audio signal generator according to the above-described invention.

  The synchronization adjustment system according to the present invention includes an audio output device according to the second or third configuration of the invention described above, and a moving image based on the video signal connected to the audio output device and output from the video and audio signal generator. And a display device for displaying.

  The synchronization adjustment system according to the present invention is connected to the video and audio signal generation device according to the above-described invention, and outputs audio based on the audio signal output from the video and audio signal generation device. An audio output device having a function of adjusting an audio output delay time, and a moving image based on a moving image signal output from the video and audio signal generator connected to the video and audio signal generator directly or via the audio output device. And a display device for displaying.

  A first synchronization adjustment method according to the present invention is a method for adjusting synchronization between a display device that displays an image based on an input signal and an audio output device that outputs audio based on the input signal. And a plurality of reproduction data reproduced by the video and audio signal generator connected to the display device and the audio output device, having a common moving image and a common sound, and a reproduction delay amount of the sound with respect to the moving image being mutually Selecting one reproduction data from a plurality of different reproduction data, reproducing the selected reproduction data by a video and audio signal generator, displaying a moving image of the reproduction data on a display device, and displaying the reproduction data Outputting audio from the audio output device, displaying a value of the audio reproduction delay amount for the moving image in the selected reproduction data, and inputting to the audio output device And the numerical value, the delay data indicating the time for delaying the analog audio signal to be output based on the audio signal the audio output device is input thereto, and has a step of storing the audio output device.

  A second synchronization adjustment method according to the present invention is a method for adjusting synchronization between a display device that displays an image based on an input signal and an audio output device that outputs audio based on the input signal. And a plurality of reproduction data reproduced by the video and audio signal generator connected to the display device and the audio output device, having a common moving image and a common sound, and a reproduction delay amount of the sound with respect to the moving image being mutually Selecting one reproduction data from a plurality of different reproduction data, reproducing the selected reproduction data by a video and audio signal generator, displaying a moving image of the reproduction data on a display device, and displaying the reproduction data A step of outputting audio from the audio output device, and a reproduction delay amount of audio for the moving image in the selected reproduction data when a selection instruction is issued in the audio output device. And a delay data indicating the time for delaying the analog audio signal to be output based on the audio signal the audio output device is input thereto, and has a step of storing the audio output device.

  A third synchronization adjustment method according to the present invention is a method for adjusting synchronization between a display device that displays an image based on an input signal and an audio output device that outputs audio based on the input signal. In the audio output device, the video signal for displaying the moving image on the display device and the analog audio signal output from the audio output device are generated by adjusting the reproduction delay amount of the audio in the analog audio signal for the video, and A step of displaying a value of an audio reproduction delay amount with respect to the video, and a time for delaying an analog audio signal output by the audio output device based on the audio signal input to the displayed numerical value based on a user operation And storing in the audio output device as delay data indicating

  A fourth synchronization adjustment method according to the present invention is a method of adjusting the synchronization between a display device that displays an image based on an input signal and an audio output device that outputs audio based on the input signal. And in the audio output device, generating a video signal for displaying a moving image on the display device and an analog audio signal output from the audio output device by adjusting a reproduction delay amount of audio in the analog audio signal for the video; and The time for delaying the analog audio signal output by the audio output device based on the audio signal input to the value of the audio reproduction delay amount for the moving image generated when the selection instruction is issued in the audio output device And storing in the audio output device as delay data.

  In the present invention, the synchronization between the video of a display device such as a plasma display device and the output sound of an audio output device such as an audio amplifier device can be easily adjusted.

  Hereinafter, a playback device-readable recording medium, video and audio signal generation device, audio output device, synchronization adjustment system, and synchronization adjustment method according to an embodiment of the present invention will be described with reference to the drawings. The video and audio signal generating apparatus will be described by taking a disk reproducing apparatus for reproducing a test disk as an example. The recording medium readable by the playback apparatus will be described by taking a test disk as an example. The audio output device will be described by taking an audio amplifier device as an example. The synchronization adjustment method will be described as the operation of the synchronization adjustment system.

Embodiment 1 FIG.
FIG. 1 is a diagram showing a synchronization adjustment system according to Embodiment 1 of the present invention. The synchronization adjustment system includes a test disc 1 as a recording medium on which video for synchronization adjustment is recorded, a disc playback device 2 as a playback device that plays back the test disc 1, and a plasma display device as a display device. 3, an audio amplifier device 4 as an audio output device, and a speaker 5.

  FIG. 2 is a block diagram showing the configuration of the plasma display device 3 in FIG. The plasma display device 3 that is the object of synchronization adjustment includes an analog video input terminal 11, a video A / D (Analog to Digital) converter 12, a signal processor 13, a display driver 14, and a plasma light emitting display 15. Have.

  The plasma light emitting display unit 15 has a plurality of discharge cells not shown. The plurality of discharge cells are arranged in a two-dimensional matrix. The discharge cell is formed for each color element of the display pixel (for example, each color in a combination of colors such as red, green, and blue).

  The discharge cell has a structure in which a gas is sealed in a cavity between an address electrode and a display electrode. A phosphor that fluoresces in the display color of each discharge cell is disposed in the cavity. When a high voltage is applied between the address electrode and the display electrode, the sealed gas emits plasma. The phosphors provided in the discharge cells emit the respective display colors with ultraviolet rays generated by the plasma emission.

  An analog video signal is input to the analog video input terminal 11 of the plasma display device 3. The analog video signal includes, for example, an analog video signal in an NTSC (National Television System Committee) method or a PAL (Phase Alternating Line) method, or an analog video signal in a format for video input / output of digital broadcasting. An analog video input terminal to which an analog video signal in a format for video input / output of digital broadcasting is input is generally called a D1 terminal or the like.

  These analog video signals have a video signal related to one display screen every predetermined period such as 1/30 second. In the analog video signal, the video signal of one display screen is configured in units of waveform components corresponding to the luminance distribution for each horizontal scanning line when the display screen is displayed on a beam scanning display device using a cathode ray tube. The One display screen is composed of a predetermined number of waveform components for each horizontal scanning line such as 480 or 525.

  The analog video input terminal 11 of the plasma display device 3 is connected to the video A / D converter 12. The video A / D converter 12 samples the analog video signal input to the analog video input terminal 11. The signal processing unit 13 generates two-dimensional image data for each display screen in the analog video signal based on the sampling data from the video A / D conversion unit 12. The display driver 14 applies a voltage corresponding to the two-dimensional image data generated by the signal processing unit 13 to the address electrode and the display electrode of the plasma light emitting display unit 15. When the potential difference between an address electrode and a display electrode becomes a high voltage, the discharge cells corresponding to the address electrode and the display electrode are plasma-discharged and fluoresce in a predetermined display color.

  Thus, based on the waveform component of the display screen in the analog video signal input to the analog video input terminal, the plasma light emission display unit 15 displays the display screen. When the analog video signal is switched to the waveform component of the next display screen, the display screen displayed by the plasma light emission display unit 15 performs internal processing in response to the display and displays a new screen. Thereby, the plasma display apparatus 3 can display the moving image in which a display screen switches with a predetermined period based on an analog video signal.

  The analog audio signal is a signal having a predetermined audio waveform component. The analog audio signal is a signal that can output a predetermined audio signaled as an analog audio signal from the speaker 5 by driving the speaker 5 based on the analog audio signal.

  Although not used in the first embodiment, the plasma display device 3 includes an analog audio input terminal 17, an amplifier circuit 18, and a built-in speaker 19. The analog audio input terminal 17 is connected to the amplifier circuit 18. The amplifier circuit 18 amplifies the analog audio signal input to the analog audio input terminal 17. The amplifier circuit 18 outputs the amplified analog audio signal to the built-in speaker 19. The built-in speaker 19 is vibrated according to the waveform component of the amplified analog audio signal. The plasma display device 3 outputs sound according to the analog sound signal input to the analog sound input terminal 17.

  FIG. 3 is a block diagram showing the configuration of the audio amplifier device 4 in FIG. The audio amplifier device 4 includes an analog audio input terminal 31 as a part of signal input means, an audio A / D converter 32, an audio D / A (Digital to Analog) converter 33, an amplifier circuit 34, an analog And an analog audio output terminal 35 as audio signal output means. The audio amplifier device 4 includes an input unit 26 as numerical value input means, a delay data setting unit 27 as setting means, a delay data memory 28 as storage means, and a digital delay circuit 29.

  Further, the audio amplifier device 4 includes a part of signal input means, an analog video input terminal 21 as a video input terminal, a delay extraction unit 23, and a display unit 24 as display means. The analog video input terminal 21 of the audio amplifier device 4 is connected to the analog video output terminal 22 and the delay extraction unit 23. The delay extraction unit 23 extracts the value of the audio reproduction delay amount for the video superimposed on the analog video signal input to the analog video output terminal 21. The delay extraction unit 23 outputs the extracted reproduction delay value to the display unit 24. The display unit 24 displays the value of the reproduction delay amount. Although not used in this embodiment, the audio amplifier device 4 has an analog video output terminal 22 as a video output terminal. The analog video output terminal 22 outputs the analog video signal input to the analog video input terminal 21. The components up to the analog video output terminal 22 are used at the time of connection shown in FIG.

  The input unit 26 of the audio amplifier device 4 outputs input data such as numerical values in accordance with a user input operation. The delay data setting unit 27 outputs the numerical value input from the input unit 26 to the delay data memory 28 as delay data. The delay data memory 28 stores delay data. The digital delay circuit 29 delays the digital value input thereto by a time corresponding to the value of the delay data stored in the delay data memory 28 and outputs the delayed digital value.

  In addition, according to the investigation test by the inventors, it has been found that when a voice precedes for 200 milliseconds or more, even a normal person is concerned about the precedence of the sound. For this reason, the delay data memory 28 and the digital delay circuit 29 may be configured to output a digital value with a delay of, for example, 100 milliseconds or more, preferably 200 milliseconds or more.

  The analog audio input terminal 31 of the audio amplifier device 4 is connected to the audio A / D converter 32. The audio A / D converter 32 samples the analog audio signal input to the analog audio input terminal 31 and outputs the sampled audio signal to the digital delay circuit 29. The audio D / A converter 33 receives the digital value output from the digital delay circuit 29 and outputs a level corresponding to the digital value. Thus, the audio D / A converter 33 outputs an analog audio signal obtained by delaying the analog audio signal input to the analog audio input terminal 31 by a time corresponding to the value of the delay data stored in the delay data memory 28. Is done.

  The amplifier circuit 34 of the audio amplifier device 4 amplifies the delayed analog audio signal output from the audio D / A converter 33. The amplifier circuit 34 outputs the amplified analog audio signal to the analog audio output terminal 35. A speaker 5 is connected to the analog audio output terminal 35 as shown in FIG. The speaker 5 outputs a predetermined sound signaled as an analog sound signal.

  The synchronization adjustment system according to Embodiment 1 of the present invention is for adjusting the synchronization between the plasma display device 3 and the audio amplifier device 4 having the above-described configuration and functions. The synchronization adjustment system according to the first embodiment of the present invention includes a moving image displayed by the plasma display device 3 based on an analog video signal and a sound output from a speaker 5 connected to the audio amplifier device 4 based on the analog audio signal. It is for adjusting the synchronization.

  In order to achieve such an object, as described above, the synchronization adjustment system according to the first embodiment of the present invention includes the test disk 1 on which video for synchronization adjustment is recorded, and the test disk 1. And a disk playback device 2 for playing back. When the disc reproducing device 2 reproduces the test disc 1, it becomes a video and audio signal generating device.

  FIG. 4 is a block diagram showing the configuration of the disk playback device 2 in FIG. The disc reproducing apparatus 2 includes a drive motor 41, an optical pickup 42 as a reading unit, a head amplifier 43, a control unit 44, and an input unit 45 as a selection unit. The disc playback apparatus 2 includes a demodulator 46, an MPEG (Moving Picture Coding Experts Group) signal separation unit 47, an audio decoder 48, an audio D / A conversion unit 49 as an audio signal generation unit, and a signal output unit. And an analog audio output terminal 50 as a unit. The disc playback apparatus 2 includes an MPEG stream decoder 52, a video D / A conversion unit 53 as a moving image signal generation unit, an analog video output terminal 54 as a part of the signal output unit, an MPEG recompression unit 55, an MPEG A TS (Transport Stream) conversion unit 56 and a digital video output terminal 57;

  The drive motor 41 rotates an optical disk such as the test disk 1 set in the disk reproducing device 2. The optical pickup 42 reads data from the rotating optical disk and outputs a waveform signal corresponding to the reproduced data. The head amplifier 43 amplifies the waveform signal output from the optical pickup 42. The input unit 45 outputs an input instruction or the like according to a user operation. The control unit 44 controls the rotation driving of the optical disc by the drive motor 41 and the data reading position from the optical disc by the optical pickup 42 based on the input instruction from the input unit 45.

  The demodulator 46 generates an MPEG signal including moving images and audio recorded on the optical disc from the waveform signal amplified by the head amplifier 43. The MPEG signal separation unit 47 separates the MPEG signal into an MPEG stream signal including at least a moving image recorded on the optical disc and a digital audio encoded signal including sound recorded on the optical disc.

  The audio decoder 48 decodes the digital audio encoded signal separated by the MPEG signal separation unit 47. The audio D / A conversion unit 49 generates an analog audio signal including a waveform component of the audio recorded on the optical disc based on the signal decoded by the audio decoder 48. The audio D / A converter 49 outputs an analog audio signal to the analog audio output terminal 50.

  The MPEG stream decoder 52 decodes the MPEG stream signal separated from the MPEG signal. Based on the signal decoded by the MPEG stream decoder 52, the video D / A conversion unit 53 generates an analog video signal including a moving image recorded on the optical disc as a waveform component for each horizontal scanning line. An analog video signal is a type of video signal. The video D / A converter 53 outputs an analog video signal to the analog video output terminal 54.

  The MPEG recompression unit 55 re-encodes and compresses the signal decoded by the MPEG stream decoder 52. The MPEG-TS conversion unit 56 generates an MPEG stream signal based on the signal compressed by the MPEG recompression unit 55. The MPEG-TS conversion unit 56 outputs the generated MPEG stream signal to the digital video output terminal 57.

  The test disc 1 on which video for synchronization adjustment is recorded is an optical disc that can be read by the disc playback device 2. Optical disks include DVD-ROM, DVD-RAM, DVD-R, DVD + R, CD, and CD-R. On the test disc 1, a plurality of reproduction data and selection screen data for selecting one reproduction data from the plurality of reproduction data are recorded.

  FIG. 5 is an explanatory diagram showing the relationship between moving images and audio recorded as one reproduction data on the test disc 1. In FIG. 5, a plurality of clocks drawn in a horizontal row at the top are a plurality of display screens 61, 62, 63, 64, 65, 66 constituting a moving image. The plurality of display screens 61, 62, 63, 64, 65, 66 are sequentially output from the left side of the drawing (that is, No. 61) and displayed. Under the plurality of display screens 61, 62, 63, 64, 65, 66, an output period of audio data 67 that tells time is drawn.

  The moving image recorded on the test disk 1 is composed of a plurality of display screens 61, 62, 63, 64, 65, 66 that are played back every predetermined period such as 1/30 seconds. Each display screen 61, 62, 63, 64, 65, 66 shows an analog clock. The timepiece has a second hand 68 and a mark 69 at the 12 o'clock position of the timepiece. In the moving image recorded on the test disc 1, the second hand 68 moves from the position of 55 seconds as stated in the watch to the position of 03 seconds, for example, every second in the time of 9 seconds. On the display screen 63 that is 00 seconds (in this example, the display screen in the period from the fifth to sixth seconds counted from the start timing of the moving image) 63, the second hand 58 and the mark 69 at the 12 o'clock position overlap. . The moving image recorded on the test disk 1 may be a moving image in which the second hand moves from the 55 second position to the 03 second position repeatedly. Note that it is effective to repeat the same moving image a plurality of times when determining whether or not the users are synchronized. Moreover, it is better to secure about 30 seconds as the length of the moving image reproduced based on the synchronization data. The length of the reproduced moving image may be several minutes or tens of minutes.

  The sound recorded on the test disk 1 is, for example, a sound of a sound “Bone” telling time. The sound “Bone” telling the time has a length of 2 seconds, for example.

  The plurality of reproduction data recorded on the test disc 1 is data for reproducing the moving image and the sound shown in FIG. The plurality of reproduction data recorded on the test disc 1 have different audio reproduction start timings. The plurality of reproduction data recorded on the test disk 1 have different audio reproduction delay amounts for moving images.

  For example, in the reproduction data illustrated in FIG. 5, the reproduction of the sound “bone” that tells the time from the timing when the second hand 68 switches from the display screen 62 at the position of 59 seconds to the display screen 63 at the position of 00 seconds. Is started. Then, at the timing when the second hand 68 switches from the display screen 64 at the position of 01 seconds to the display screen 665 at the position of 02 seconds, the reproduction of the sound “Bone” telling the time is finished.

  In the case of the audio reproduction start timing shown in FIG. 5, at the timing (fifth second) when the second hand 68 is switched to the position where the second hand 68 becomes 00 seconds in the moving image, the sound “Bone” telling the time starts to sound. In the reproduction data, the moving image and the sound are synchronized. Hereinafter, this timing is referred to as synchronization timing.

  Therefore, in the other reproduction data recorded on the test disc 1, the reproduction of the sound “Bone” that tells the time is started at a timing different from the synchronization timing. Specifically, for example, in other reproduction data recorded on the test disc 1, a time signal is started at a timing delayed by 10 milliseconds from the synchronization timing, or a timing delayed by 20 milliseconds from the synchronization timing. The sound of the time signal starts at, the sound of the time signal starts at a timing delayed by 50 milliseconds from the synchronization timing, or the sound of the time signal starts at timing delayed by 100 milliseconds from the synchronization timing The time signal sound may be started at a timing delayed by 150 milliseconds from the synchronization timing.

  Each piece of reproduction data recorded on the test disk 1 has the value of the start timing of the sound of each time signal as the value of the reproduction delay amount of the sound with respect to the moving image. The value of the start timing of the sound of the time signal is represented as a value of the delay time from the synchronization timing. For example, in the case of the reproduction data of FIG. 5 in which the moving image and the sound are synchronized, the value of “0” seconds is given as the value of the start timing of the hourly sound. In addition to this, for example, reproduction data whose sound is delayed by 10 milliseconds from the moving image has a value of “10” milliseconds as the value of the start timing of the sound of the time signal.

  As described above, each reproduction data recorded on the test disc 1 has a value of the start timing of the time signal sound together with the moving image and the sound set so that the time sound is reproduced at a predetermined timing. The moving image and audio are recorded on the test disc 1 as MPEG data. MPEG includes MPEG-1, MPEG-2, MPEG-4, and the like. The start timing value of the time signal is recorded as private stream data of MPEG data.

  Note that the signal waveform of the analog video signal on one display screen is drawn in the lower half of FIG. Specifically, the signal waveform of the analog video signal on the second display screen 62 from the left side of the moving image is drawn. An analog video signal corresponding to one display screen has a predetermined number of horizontal scanning periods such as 480 and 525, for example. Each horizontal scanning period includes a waveform component 71 corresponding to the luminance distribution for each horizontal scanning line.

  In addition, 20 vertical scanning periods are secured as vertical blanking periods 72 at the beginning of the analog video signal corresponding to each display screen. The vertical blanking period 72 does not include the waveform component 71 corresponding to the luminance distribution of the display screen. The signal waveform in the vertical blanking period 72 is not used as a beam scanning signal in the cathode ray tube.

  FIG. 6 is a diagram showing a selection screen 81 recorded as selection screen data on the test disc 1. The selection screen 81 has a plurality of selection objects 82 that can be selected in the reproduced screen. The plurality of selection objects 82 is the same number as the plurality of reproduction data recorded on the test disc 1. The plurality of selection objects 82 may be divided and displayed on a plurality of selection screens. Further, the test disc 1 has correspondence information that associates a plurality of selected objects 82 and a plurality of reproduction data on a one-to-one basis. Each selected object 82 displays the same value as the start timing value of the time signal sound of the reproduction data to which it corresponds. For example, a value of “0 seconds” is displayed on the selection object 82 corresponding to the reproduction data of FIG. 5 in which the moving image and the sound are synchronized.

  Then, the selection screen data is recorded in the data recording area of the test disc 1 at a position to be reproduced before a plurality of reproduction data. For example, the test disk 1 is recorded by recording data on a recording medium such as a DVD-ROM, a DVD-RAM, a DVD-R, and a DVD + R with a predetermined data structure such as a DVD-video recording format or a DVD-VR recording format. When forming, the selection screen data may be recorded as the data of the track menu screen, the data of the chapter menu screen, and the data of the volume menu screen. The plurality of reproduction data may be recorded as track data, chapter data, or the like to be reproduced when the selection object 82 on the selection screen 81 is selected on the menu screen.

  Next, an adjustment method for adjusting the synchronization between the plasma display device 3 and the audio amplifier device 4 using the audio synchronization system shown in FIG. 1 will be described.

  The user first connects the disc playback device 2, the plasma display device 3, and the audio amplifier device 4 using the connection cable 8. Specifically, the analog video output terminal 54 of the disc playback device 2 is connected to the analog video input terminal 11 of the plasma display device 3 and the analog video input terminal 21 of the audio amplifier device 4.

  When there are no two output terminals, the signal is distributed by a video signal distributor or the like, and the analog video output terminal 54 of the disc playback device 2 is connected to the analog video input terminal 11 of the plasma display device 3 and the audio amplifier device. 4 analog video input terminals 21 may be connected. In addition to this, as shown in FIG. 7, for example, two connection cables 8 are used to connect the analog video output terminal 54 of the disc playback apparatus 2 and the analog video input terminal 21 of the audio amplifier apparatus 4, and audio. The analog video output terminal 22 of the amplifier device 4 and the analog video input terminal 11 of the plasma display device 3 may be connected. FIG. 7 is a diagram illustrating another connection example of the synchronization adjustment system according to the first embodiment of the present invention.

  The user also uses the connection cable 8 to connect the analog audio output terminal 50 of the disc playback apparatus 2 and the analog audio input terminal 31 of the audio amplifier apparatus 4.

  After the disc player 2, the plasma display device 3, and the audio amplifier device 4 are connected to each other, the user operates the input unit 26 of the audio amplifier device 4 to reset the delay data memory 28. The input unit 26 of the audio amplifier device 4 outputs input data having a numerical value “0” based on a user operation. The delay data setting unit 27 stores the input data of the numerical value “0” in the delay data memory 28 as delay data.

  After the above preparation is completed, the user sets the test disc 1 in the disc playback device 2 and operates the input unit 45 of the disc playback device 2. Based on an input instruction from the input unit 45, the control unit 44 starts to control the rotational drive of the test disk 1 by the drive motor 41 and the data reading position from the test disk 1 by the optical pickup 42.

  When rotation of the test disk 1 is started, the control unit 44 scans the data recording area of the test disk 1 with the optical pickup 42, determines the media type, recording format, etc. of the test disk 1, and according to the recording format. Data reading starts from the first playback position. Selection screen data is recorded at a position where the test disk 1 is reproduced first. Therefore, the optical pickup 42 outputs a waveform signal corresponding to the selection screen data recorded on the test disk 1.

  A waveform signal corresponding to the selection screen data is input to the demodulator 46 via the head amplifier 43. The demodulator 46 generates an MPEG signal based on the waveform signal corresponding to the selected screen data. The MPEG signal separation unit 47 separates the MPEG signal into an MPEG stream signal and a digital audio encoded signal. The MPEG stream decoder 52 decodes the MPEG stream signal, and the video D / A converter 53 generates an analog video signal based on the signal decoded by the MPEG stream decoder 52 and outputs the analog video signal to the analog video output terminal 54. .

  An analog video input terminal 11 of the plasma display device 3 and an analog video input terminal 21 of the audio amplifier device 4 are connected to the analog video output terminal 54 of the disc playback device 2 by a connection cable 8. The analog video signal output to the analog video output terminal 54 is input to these analog video input terminals 11 and 21.

  The video A / D converter 12 of the plasma display device 3 samples the analog video signal input to the analog video input terminal 11, and the signal processor 13 generates two-dimensional image data based on the sampling data, The display driver 14 controls the voltage applied to the address electrode and the display electrode of the plasma light emitting display unit 15 based on the two-dimensional image data. In the plasma light emitting display unit 15, the discharge cells in which the potential difference between the address electrodes and the display electrodes becomes a high voltage fluoresce in the respective display colors.

  As a result, the test data selection screen 81 shown in FIG. 6 is displayed on the plasma light emission display unit 15 of the plasma display device 3.

  When the test data selection screen 81 is displayed on the plasma display device 3, the user wants to try out the audio playback delay value for the moving image from among the plurality of selection objects 82 displayed on the selection screen 81. Is selected. Specifically, the user operates the input unit 45 of the disc playback apparatus 2, and the input unit 45 selects the selection object 82 based on the user's operation. The input unit 45 specifies reproduction data corresponding to the selected selection object 82 based on the correspondence information of the selected selection object 82, and instructs to read the reproduction data. The control unit 44 moves the optical pickup 42 to the disk position where the reproduction data is recorded. The optical pickup 42 outputs a waveform signal corresponding to the reproduction data corresponding to the selected selection object 82.

  A waveform signal corresponding to the reproduction data is input to the demodulator 46 via the head amplifier 43. The demodulator 46 generates an MPEG signal based on the waveform signal corresponding to the reproduction data. This MPEG signal includes the value of the start timing of the time signal sound recorded as the private stream data of the MPEG data in the reproduction data.

  The MPEG signal separation unit 47 separates the MPEG signal into an MPEG stream signal and a digital audio encoded signal. The MPEG stream decoder 52 decodes the MPEG stream signal, and the video D / A converter 53 generates an analog video signal based on the signal decoded by the MPEG stream decoder 52 and outputs the analog video signal to the analog video output terminal 54. .

  The analog video signal based on the reproduction data has a signal waveform of the analog video signal shown in FIG. The video D / A converter 53 superimposes the value of the start timing of the time signal sound recorded as the private stream data of the MPEG data in the reproduction data on the signal waveform of each display screen. Specifically, for example, as shown in the second display screen 62 from the left in FIG. 5, the video D / A conversion unit 53 performs each in the 20th horizontal scanning cycle of the signal waveform of each display screen. The value of the start timing of the time signal sound is superimposed as data on the signal waveform of the display screen.

  In addition, the 20th horizontal scanning period of the signal waveform of each display screen is standardized as “EIAJ (Japan Electronic Machinery Manufacturers Association: now Japan Electronics and Information Technology Industries Association (JEITA)) CPR-1204”. The recorded video ID signal may be superimposed. This video ID signal is a 20-bit signal for transmitting the aspect ratio of the display screen, 3D information, pull-down information, cue information, video recording date, character information, signal format, and the like.

  When superimposing the value of the start timing of the time signal as data on the twentieth horizontal scanning cycle of the signal waveform of each display screen, for example, the following method can be considered. As a specific example, “1011” undefined as “Word1” of the video ID signal at the same bit position as “Word1” of the video ID signal indicates the value of the start timing of the sound of the time signal. Use as header. In addition, the value (deviation information) of the start timing of the timely sound is described at the same bit position as “Word2” of the video ID signal.

  “Word2” is 1 byte. Therefore, when describing the value (deviation information) of the start timing of the timely sound in the same bit position as “Word2” of this video ID signal, if the deviation value is described with 1 millisecond as “1”, 0 1 to 255 milliseconds can be described in units of 1 millisecond. If the deviation value is described with 2 milliseconds as “1”, the deviation value from 0 to 511 milliseconds can be described in units of 2 milliseconds.

  “EIAJ CPR-1204” specifies that the same data as the twentieth horizontal scanning cycle of the signal waveform of each display screen is superimposed on the 283rd horizontal scanning cycle of the signal waveform of each display screen. Yes. Therefore, instead of the twentieth horizontal scanning cycle or together with the twentieth horizontal scanning cycle, the value of the start timing of the time signal may be superimposed on the 283rd horizontal scanning cycle.

  For example, the upper bit data of the time signal start timing value is superimposed on the twentieth horizontal scanning cycle, and the lower bit of the time signal start timing value is superimposed on the 283rd horizontal scanning cycle. Data may be superimposed. Even if the deviation value is described with 1 millisecond as “1”, for example, by superimposing the value of the start timing of the timely sound separately in the 20th horizontal scanning period and the 283rd horizontal scanning period , 0 to 65535 milliseconds can be described in units of 1 millisecond.

  Returning to FIG. 1, the analog video signal output to the analog video output terminal 54 of the disc playback device 2 is input to the analog video input terminal 11 of the plasma display device 3 and the analog video input terminal 21 of the audio amplifier device 4. .

  The plasma display device 3 displays a moving image based on the analog video signal input to the analog video input terminal 11 on the plasma light emission display unit 15. As shown in FIG. 5, the plasma display device 3 displays a moving image in which the second hand of the analog clock moves from the position of 55 seconds to the position of 03 seconds.

  When an analog video signal is input to the analog video input terminal 21 of the audio amplifier device 4, the delay extraction unit 23 extracts a reproduction delay amount value superimposed on the analog video signal. Specifically, the delay extracting unit 23 extracts a waveform corresponding to the value of the start timing of the time signal from the waveform component of the 20th horizontal scanning cycle of the signal waveform of each display screen, and according to the waveform. Generate a digital value. The delay extraction unit 23 outputs the extracted reproduction delay value to the display unit 24. The display unit 24 displays the value of the reproduction delay amount. Thereby, for example, when reproducing data whose reproduction delay amount is “0” seconds is being reproduced, a display meaning “0 seconds” is displayed on the display unit 24.

  Further, as described above, the MPEG signal separation unit 47 of the disc playback apparatus 2 separates the MPEG signal into the MPEG stream signal and the digital audio encoded signal. The audio D / A converter 49 of the disc playback device 2 generates an analog audio signal based on this digital audio encoded signal and outputs it to the analog audio output terminal 50. An analog audio input terminal 31 of the audio amplifier device 4 is connected to an analog audio output terminal 50 of the disc reproducing apparatus 2 by a connection cable 8.

  The audio A / D converter 32 of the audio amplifier device 4 samples the analog audio signal input to the analog audio input terminal 31. The digital delay circuit 29 delays the sampled data by a time corresponding to the value of the delay data stored in the delay data memory 28 and outputs the delayed data. The delay data memory 28 stores “0” seconds as delay data. Accordingly, the digital delay circuit 29 immediately outputs the data sampled by the audio A / D converter 32 without delaying. The audio D / A converter 33 outputs a level corresponding to the digital value output from the digital delay circuit 29. As a result, the analog audio signal input to the analog audio input terminal 31 is output from the audio D / A converter 33 with little delay.

  The amplifier circuit 34 of the audio amplifier device 4 amplifies the delayed analog audio signal output from the audio D / A converter 33 and outputs the amplified analog audio signal to the analog audio output terminal 35. A speaker 5 is connected to the analog audio output terminal 35. The speaker 5 outputs a predetermined sound signaled as an analog sound signal. Thereby, the speaker 5 outputs the sound of reproduction data. The speaker 5 outputs a sound of “bone” telling the time at a predetermined timing for a length of 2 seconds. In the case of the reproduction data shown in FIG. 5, the speaker 5 starts to output a “bone” sound that tells the time after about five seconds from the start of the reproduction data.

  As described above, when the input unit 45 of the disc playback apparatus 2 selects the selection object 82, the plasma display apparatus 3 displays a moving image of playback data corresponding to the selected selection object 82. The speaker 5 connected to the audio amplifier device 4 outputs the sound of the reproduction data at the timing of the delay time corresponding to the reproduction data. The display unit 24 of the audio amplifier device 4 displays the value of the start timing of the time signal sound in the reproduction data as the value of the reproduction delay amount.

  Thereby, the user reproduces one by one by selecting a plurality of reproduction data recorded on the test disc 1 on the selection screen 81, and the difference in the difference between the moving image and the sound in the plurality of reproduction data is determined. You can hear and compare.

  Therefore, for example, when viewing playback data in which sound is output without delay with respect to the movement of the second hand in the moving image of the analog clock in FIG. 5, the second hand 68 is set to 00 seconds after the time signal “Bone” is received. When it feels like the position, the playback data having a playback delay amount larger than the playback data is selected and viewed. The user repeatedly watches such playback data, and when the time signal “Bone” is received, the user feels that the second hand 68 is at the 00 second position, that is, the movement of the second hand 68 in an analog clock movie. Search for playback data that feels the same as the voice that tells the time. If there is nothing that feels that the movement of the second hand 68 matches the sound that tells the time, the reproduction data that is most likely to match is searched. Then, the user presses the synchronization OK button of the audio amplifier device 4 while reproducing the reproduction data.

  The input unit 26 of the audio amplifier device 4 sets the data output from the delay extraction unit 23 at that time in the delay data memory 28 based on a user operation.

  When delay data with a value other than “0” is stored in the delay data memory 28, the digital delay circuit 29 corresponds to the digital value input from the audio A / D converter 32 as the value of the delay data. Delayed in time and output to the audio D / A converter 33. Therefore, the analog audio signal input to the analog audio input terminal 31 of the audio amplifier device 4 is delayed by the value stored in the delay data memory 28 and then output from the analog audio output terminal 35 to the speaker 5. The The speaker 5 outputs sound with a delay corresponding to the value.

  Therefore, after setting the value of the reproduction delay amount other than “0”, reproduction data in which sound is output without delay with respect to the movement of the second hand 68 in the analog clock moving image shown in FIG. 5, that is, synchronized reproduction. When data is reproduced, the output of the sound is delayed by the value of the reproduction delay amount.

  As a result, as shown in FIG. 5, the second hand displayed on the plasma display device 3 is 00 when viewing the reproduction data in which sound is output without delay with respect to the movement of the second hand 68 in the moving image of the analog clock. When the second position is reached, a voice “Bone” can be heard from the speaker 5. In this way, by using the synchronization adjustment system shown in FIG. 1 or FIG. 7, the plasma display device 3 and the audio amplifier device 4 can be adjusted to be synchronized.

  For example, after adjusting the plasma display device 3 and the audio amplifier device 4 to synchronize using the synchronization adjustment system shown in FIG. 1, the connection of the disk reproducing device 2, the plasma display device 3, and the audio amplifier device 4 is as follows: You may change like FIG. Even if the connection relationship is changed in this way, the audio amplifier device 4 delays the output timing of the sound so as to cancel the delay of the moving image display in the plasma display device 3, so the plasma display device 3 and the audio amplifier device Synchronization with 4 is ensured.

  As described above, in the synchronization adjustment system according to the first embodiment, one of a plurality of reproduction data stored in the test disk 1 is selected, and the selected reproduction data is reproduced by the disk reproduction device 2. Then, the moving image of the selected reproduction data can be displayed on the plasma display device 3, and the sound of the selected reproduction data can be output from the speaker 5 connected to the audio amplifier device 4.

  Also, the audio amplifier device 4 displays the value of the audio reproduction delay amount for the moving image in the selected reproduction data on the display unit 24, and delay data for delaying the output of the analog audio signal from the numerical value input from the input unit 26. Is stored in the delay data memory 28.

  Therefore, by using the synchronization adjustment system according to the first embodiment, the moving image displayed by the plasma display device 3 based on the analog video signal and the audio output by the audio amplifier device 4 based on the analog audio signal are synchronized. Can be adjusted.

  In addition, in the synchronization adjustment system according to the first embodiment, the reproduction data stored in the test disk 1 is reproduced by the disk reproduction device 2 to be input to the plasma display device 3 for synchronization adjustment. A signal and an analog audio signal to be input to the audio amplifier device 4 are generated.

  Further, since the user can select and reproduce a plurality of reproduction data whose audio reproduction delay amount for the moving image is known in advance based on the value of the delay amount, the moving image when the reproduction delay amount is changed The degree of deviation from the voice can be easily compared. Therefore, for example, a moving image and sound of a single time signal in which the moving image and the sound are synchronized are reproduced on the disc reproducing apparatus 2 and the like, and the amount of delay is adjusted under the circumstances, thereby matching the moving image and the sound. The user can easily determine whether or not the moving image and the sound match as compared with the case where the delay amount is searched only by his / her own sense. In order to obtain such an effect, a plurality of pieces of reproduction data are combined such that the difference between the plurality of reproduction delay amounts is a predetermined constant value (for example, the reproduction delay amount is 10 milliseconds, It is desirable to include a combination of 20 milliseconds and 30 milliseconds.

  In addition, when the plasma display device 3 and the audio amplifier device 4 are used in combination, by using the synchronization adjustment system according to the first embodiment and adjusting the video and audio so that they are synchronized in advance, For example, when a movie, a concert, a recorded program, or the like is played on the disc playback device 2, it can be viewed without feeling a sense of incongruity due to a sound shift with respect to the moving image.

Embodiment 2. FIG.
The synchronization adjustment system according to the second embodiment of the present invention includes a test disk 1, a disk playback device 2, a plasma display device 3, an audio amplifier device 4, and a speaker 5. These connection relationships are the same as those in FIG.

  FIG. 8 is a block diagram showing the configuration of the audio amplifier device 4 according to Embodiment 2 of the present invention. The audio amplifier device 4 includes a remote control unit 91 as a part of a selection instruction input unit and a remote input unit, a light receiving unit 92 as a part of the selection instruction input unit and a reception unit, a mode determination unit 93, and a setting unit. Delay data setting unit 94.

  The remote control unit 91 is formed separately from the audio amplifier device 4, has operation buttons such as a numeric keypad and a selection button (not shown), and outputs numerical values and instructions based on operations on the operation buttons. The remote control unit 91 wirelessly transmits numerical values and instructions on infrared rays.

  The light receiving unit 92 receives infrared rays. The light receiving unit 92 extracts and outputs numerical values and instructions from the received infrared rays.

  The mode determination unit 93 determines the mode of the audio amplifier device 4. The audio amplifier device 4 has a normal mode and a delay data setting mode. In the normal mode, the audio amplifier device 4 delays the signal input to the analog audio input terminal by the time set in the delay data memory 28 and outputs it from the analog audio output terminal. In the delay data setting mode, the audio amplifier device 4 executes processing for setting delay data in the delay data memory.

  The delay data setting unit 94 stores the value of the reproduction delay amount extracted by the delay extraction unit 23 in the delay data memory 28 as delay data.

  The other components of the audio amplifier device 4 have the same functions as the components of the same name of the audio amplifier device 4 of the first embodiment, and are described with the same reference numerals as those of the first embodiment. Is omitted. The detailed components of the test disk 1, the disk reproducing device 2, the plasma display device 3, and the speaker 5 according to the second embodiment of the present invention are the same as the components of the same name according to the first embodiment. The same reference numerals as those of the first embodiment are given, and the description thereof is omitted.

  Next, an adjustment method for adjusting the synchronization between the plasma display device 3 and the audio amplifier device 4 using the audio synchronization system according to the second embodiment of the present invention will be described.

  First, the user uses the connection cable 8 to connect the disc reproducing device 2, the plasma display device 3, and the audio amplifier device 4 as shown in FIG. 1 or FIG.

  After the disc player 2, the plasma display device 3, and the audio amplifier device 4 are connected to each other, the user operates the remote control unit 91 to set the audio amplifier device 4 to the delay data setting mode. The remote control unit 91 transmits an instruction to set to the delay data setting mode by infrared based on a user operation. The light receiving unit 92 of the audio amplifier device 4 receives this infrared light and outputs an instruction to set to the delay data setting mode to the mode determining unit 93.

  The mode determination unit 93 sets the audio amplifier device 4 to the delay data setting mode based on the instruction input from the light receiving unit 92. Specifically, the mode determination unit 93 resets the delay data memory 28. The delay data memory 28 stores “0” seconds as the value of the delay data by being reset.

  After the audio amplifier device 4 starts operating in the delay data setting mode, the user sets the test disc 1 in the disc playback device 2 and operates the input unit 45 of the disc playback device 2. As a result, reproduction of the test disk 1 is started, and an analog video signal and an analog audio signal are output from the disk reproduction device 2. First, a test data selection screen 81 shown in FIG. 6 is displayed on the plasma light emission display unit 15 of the plasma display device 3.

  When the test data selection screen 81 is displayed on the plasma display device 3, the user selects the selection object 82 from among the plurality of selection objects 82 displayed on the selection screen 81. As a result, the disc playback apparatus 2 outputs an analog video signal including the moving image of the selected playback data and an analog audio signal including the audio of the selected playback data. In the twentieth horizontal scanning cycle of the signal waveform of each display screen of the analog video signal, the value of the audio reproduction delay amount with respect to the moving image in the reproduction data is superimposed.

  The plasma display device 3 displays a moving image as shown in FIG. 5 based on the analog video signal output from the disk reproducing device 2. The delay extraction unit 23 of the audio amplifier device 4 extracts the value of the reproduction delay amount from the waveform component of the 20th horizontal scanning cycle of the signal waveform of each display screen of the analog video signal. The display unit 24 of the audio amplifier device 4 displays the value of the reproduction delay amount.

  The audio A / D converter 32 of the audio amplifier device 4 samples the analog audio signal output from the disc playback device 2. The digital delay circuit 29 delays the sampled data by a time corresponding to the value of the delay data stored in the delay data memory 28 and outputs the delayed data. At the beginning of the delay data setting mode, “0” seconds are stored in the delay data memory 28 as delay data. Accordingly, the digital delay circuit 29 immediately outputs the data sampled by the audio A / D converter 32 without delaying. The audio D / A converter 33 outputs a level corresponding to the digital value output from the digital delay circuit 29. As a result, the analog audio signal input to the analog audio input terminal 31 is output from the audio D / A converter 33 with little delay. The speaker 5 outputs a predetermined sound converted into an analog sound signal based on the analog sound signal. The speaker 5 outputs a sound of “bone” telling the time at a predetermined timing for a length of 2 seconds.

  The user reproduces one by one by selecting a plurality of reproduction data recorded on the test disc 1 on the selection screen 81, and listens to the difference in how the audio is shifted with respect to the moving image in the plurality of reproduction data. When the reproduction data to be reproduced changes, the value of the reproduction delay amount included in the analog video signal also changes based on that, and the value of the reproduction delay amount extracted by the delay extraction unit 23 also changes.

  When the user determines that the predetermined moving image displayed on the plasma display device 3 and the predetermined sound output from the speaker 5 are synchronized, the user operates the remote control unit 91. The remote control unit 91 transmits a selection instruction by infrared based on a user operation. The light receiving unit 92 receives this infrared ray and outputs a selection instruction to the delay data setting unit 94. When a selection instruction is input, the delay data setting unit 94 stores the value of the reproduction delay amount extracted by the delay extraction device when the selection instruction is input in the delay data memory 28 as delay data. With the above processing, the delay data setting mode ends.

  When delay data other than “0” is stored in the delay data memory 28 at the time when the delay data setting mode ends, the digital delay circuit 29 is input from the audio A / D converter 32 thereafter. The digital value is delayed by a time corresponding to the value of the delayed data and output to the audio D / A converter 33. Therefore, the analog audio signal input to the analog audio input terminal 31 of the audio amplifier device 4 is delayed by the value stored in the delay data memory 28 and then output from the analog audio output terminal 35 to the speaker 5. The The speaker 5 outputs sound with a delay corresponding to the value. As a result, the moving image displayed on the plasma display device 3 and the sound output from the audio amplifier device 4 are synchronized.

  As described above, in the synchronization adjustment system according to the second embodiment, one of a plurality of reproduction data stored in the test disk 1 is selected, and the selected reproduction data is reproduced by the disk reproduction device 2. Then, the moving image of the selected reproduction data can be displayed on the plasma display device 3, and the sound of the selected reproduction data can be output from the speaker 5 connected to the audio amplifier device 4. Also, the audio amplifier device 4 stores the value of the reproduction delay amount extracted by the delay extraction unit 23 based on the selection signal of the remote control unit 91 as delay data in the delay data memory. Therefore, the plasma display device 3 and the audio amplifier device 4 can be synchronized.

  In addition, since the user can select and reproduce a plurality of reproduction data whose reproduction delay amount of audio for the moving image is known in advance based on the value of the delay amount, the audio is particularly delayed for the moving image. Therefore, it is possible to easily compare the degree of shift between the moving image and the sound when the reproduction delay amount is changed. Therefore, for example, a moving image and sound of a single time signal in which the moving image and the sound are synchronized are reproduced on the disc reproducing apparatus 2 and the like, and the amount of delay is adjusted under the circumstances, thereby matching the moving image and the sound. The user can easily determine whether or not the moving image and the sound match as compared with the case where the delay amount is searched only by his / her own sense. In order to obtain such an effect, a plurality of pieces of reproduction data are combined such that the difference between the plurality of reproduction delay amounts is a predetermined constant value (for example, the reproduction delay amount is 10 milliseconds, It is desirable to include a combination of 20 milliseconds and 30 milliseconds.

  In addition, when the plasma display device 2 and the audio amplifier device 4 are used in combination, by using the synchronization adjustment system according to the second embodiment, the moving images and the audio are adjusted in advance, For example, when a movie, a concert, a recorded program, or the like is played on the disc playback device 2, it can be viewed without feeling a sense of incongruity due to a sound shift with respect to the moving image.

Embodiment 3 FIG.
FIG. 9 shows a synchronization adjustment system according to Embodiment 3 of the present invention. The synchronization adjustment system includes a plasma display device 3, an audio amplifier device 4, and a speaker 5.

  FIG. 10 is a block diagram showing the configuration of the audio amplifier device 4 in FIG. The audio amplifier device 4 includes a mode determination unit 101, a test data generation unit 102 as a signal generation unit, a video input switching circuit 103 as a video input switching unit, and an audio input switching circuit 103.

  The mode determination unit 101 determines the mode of the audio amplifier device 4. The audio amplifier device 4 has a normal mode and a delay data setting mode. In the normal mode, the audio amplifier device 4 delays the signal input to the analog audio input terminal by the time set in the delay data memory 28 and outputs it from the analog audio output terminal. In the delay data setting mode, the audio amplifier device 4 executes processing for setting delay data in the delay data memory.

  The test data generation unit 102 outputs an analog video signal to the video input switching circuit 103. The analog video signal output from the test data generation unit 102 is the same as that output from the disc playback apparatus 2 of the first embodiment. The test data generator 102 outputs an analog audio sampling signal obtained by sampling the analog audio signal to the audio input switching circuit 104. The analog audio sampling signal is the same as the signal output from the audio decoder 48 of the disc playback apparatus 2 of the first embodiment.

  Further, the test data generation unit 102 outputs the analog video signal and the analog audio sampling signal with a predetermined reproduction delay amount. The test data generation unit 102 outputs the value of the reproduction delay amount to the display unit 24. The display unit 24 displays the value of the reproduction delay amount.

  For more detailed components of the test data generating unit 102, for example, the disk reproducing device 2 of the first embodiment may be referred to. The test data generation unit 102 stores, for example, MPEG data as a moving image in which the second hand of the clock moves from the 55-second position to the 03-second position and voice data “Bone” that tells the time in a semiconductor memory (not shown). An MPEG signal separation unit (not shown) reads out the MPEG signal and separates it into an MPEG stream signal and a digital audio encoded signal. An MPEG stream decoder (not shown) decodes the MPEG stream signal and outputs a video D / A (not shown). The converter may generate an analog video signal based on the decoded video signal, and an audio decoder (not shown) may decode the digital audio encoded signal to generate an analog audio sampling signal.

  The video input switching circuit 103 is connected to the analog video input terminal 21 and the test data generating unit 102. The video input switching circuit 103 selects one of the analog video input terminal 21 and the test data generation unit 102 and outputs an analog video signal from the selected one to the analog video output terminal.

  The audio input switching circuit 103 is connected to the analog audio input terminal 31. The audio input switching circuit 103 normally outputs an analog audio signal from the analog audio input terminal 31 to the audio A / D converter 32. The audio input switching circuit 103 does not output an analog audio signal to the audio A / D converter 32 in the mute state.

  The other components of the audio amplifier device 4 have the same functions as the components of the same name of the audio amplifier device 4 of the first embodiment, and are described with the same reference numerals as those of the first embodiment. Is omitted. Further, the detailed constituent elements of the plasma display device 3 and the speaker 5 according to the second embodiment of the present invention have the same functions as the constituent elements of the same name according to the first embodiment. The same reference numerals as those in the first embodiment are attached and the description thereof is omitted.

  Next, an adjustment method for adjusting the synchronization between the plasma display device 3 and the audio amplifier device 4 using the audio synchronization system according to the third embodiment of the present invention will be described.

  First, the user uses the connection cable 8 to connect the analog video output terminal 22 of the audio amplifier device 4 and the analog video input terminal 11 of the plasma display device 3 as shown in FIG.

  After connecting the plasma display device 3 and the audio amplifier device 4 to each other, the user operates the input unit 26 to set the audio amplifier device 4 to the delay data setting mode. The input unit 26 outputs an instruction to set to the delay data setting mode to the mode determination unit 101.

  The mode determination unit 101 sets the audio amplifier device 4 to the delay data setting mode based on the instruction input from the input unit 26. Specifically, the mode determination unit 101 causes the video input switching circuit 103 to select the test data generation unit 102, causes the audio input switching circuit 104 to mute the input signal, and instructs the test data generation unit 102 to start signal output. To do.

  After setting the audio amplifier device 4 to the delay data setting mode, the user operates the input unit 26 to input the value of the audio reproduction delay amount for the moving image. The input unit 26 outputs the input reproduction delay amount value to the test data generation unit 102. It should be noted that the input unit 26 may generate a predetermined reproduction delay amount value and output it to the test data generating unit 102 based on, for example, an operation of an up / down key (not shown) by the user.

  The test data generator 102 starts outputting an analog video signal and an analog audio sampling signal. The test data generation unit 102 starts outputting the analog audio sampling signal after a time corresponding to the value of the reproduction delay amount input from the input unit 26 after starting the output of the analog video signal. In addition, the test data generation unit 102 causes the display unit 24 to display the value of the reproduction delay amount of the output audio for the output moving image.

  The analog video signal output from the test data generation unit 102 is output from the audio amplifier device 4 via the video input switching circuit 103 and the analog video signal output terminal 22. The analog video signal output from the audio amplifier device 4 is input to the plasma display device 3. The plasma display device 3 displays a moving image based on the input analog video signal.

  The analog audio sampling signal output from the test data generation unit 102 is input to the audio D / A conversion unit 33. The audio D / A converter 33 outputs a level corresponding to the value of the analog audio sampling signal. The audio D / A converter 33 outputs an analog audio signal based on the analog audio sampling signal. The analog audio signal output from the audio D / A converter 33 is amplified by the amplifier circuit 34 and output from the analog audio output terminal 35 of the audio amplifier device 4 to the speaker 5. The speaker 5 outputs sound based on the analog sound signal.

  The user views the moving image displayed on the plasma display device 3 and the sound output from the audio amplifier device 4. The user hears and compares the difference in how the video and audio are shifted.

  When the user determines that the moving image displayed on the plasma display device 3 and the predetermined sound output from the speaker 5 are not synchronized, the user operates the input unit 26 to set a new reproduction delay amount value. input. For example, if it is determined that the audio is ahead of the moving image, the user inputs a value larger than the value of the reproduction delay amount displayed on the display unit 24. If it is determined that the audio is delayed from the moving image, the user inputs a value smaller than the value of the reproduction delay amount displayed on the display unit 24. The input unit 26 outputs the input numerical value to the test data generation unit 102. The test data generating unit 102 outputs an analog video signal and an analog audio sampling signal with a newly input numerical reproduction delay amount. The test data generation unit 102 causes the display unit 24 to display a newly input numerical value.

  Note that the input unit 26 generates a reproduction delay amount value obtained by increasing or decreasing a reproduction delay amount value set at the time of input by a predetermined value based on, for example, an operation such as an up / down key (not shown) by the user. The generated reproduction delay amount value may be output to the test data generating unit 102.

  When the user selects a screen and determines that the moving image displayed on the plasma display device 3 is synchronized with the predetermined sound output from the speaker 5, the screen is displayed on the display unit 24. Enter the playback delay value. The display unit 24 outputs the value of the reproduction delay amount displayed at that time.

  When a certain value is input from the input unit 26, the delay data setting unit 27 stores the value in the delay data memory 28 as delay data. With the above processing, the delay data setting mode ends.

  When delay data having a value other than “0” is stored in the delay data memory 28 in the delay data setting mode, the digital delay circuit 29 is input from the audio A / D converter 32 in the subsequent normal mode. The digital value is delayed by a time corresponding to the value of the delay data and output to the audio D / A converter 33. Therefore, the analog audio signal input to the analog audio input terminal 31 of the audio amplifier device 4 is delayed by the value stored in the delay data memory 28 and then output from the analog audio output terminal 35 to the speaker 5. The The speaker 5 outputs sound with a delay corresponding to the value. As a result, the moving image displayed on the plasma display device 3 and the sound output from the audio amplifier device 4 are synchronized.

  As described above, in the synchronization adjustment system according to the third embodiment, the test data generation unit 102 of the audio amplifier device 4 outputs moving images and audio with a certain reproduction delay amount. Also, the delay data setting unit 27 of the audio amplifier device 4 stores the value of the reproduction delay amount input from the input unit 26 in the delay data memory 28 as delay data. Therefore, the plasma display device 3 and the audio amplifier device 4 can be synchronized.

  Moreover, in the synchronization adjustment system according to the third embodiment, the audio amplifier device 4 generates and outputs moving images and audio used for synchronization adjustment. For example, an analog video signal and an analog audio signal for synchronization adjustment are output. Can be adjusted without using a dedicated video and audio signal generator for generating

  As a result, the user who purchased the plasma display device 3 and the audio amplifier device 4 can easily perform the synchronization adjustment without purchasing a special dedicated device at home.

  In addition, since the user can select or set the playback delay amount of the audio for the video and play the playback data, the user can select or set the playback data in which the audio is delayed for the video. Therefore, it is possible to easily compare the deviation between the moving image and the sound when the reproduction delay amount is changed. Therefore, for example, a moving image and sound of a single time signal in which the moving image and the sound are synchronized are reproduced on the disc reproducing apparatus 2 and the like, and the amount of delay is adjusted under the circumstances, thereby matching the moving image and the sound. The user can easily determine whether or not the moving image and the sound match as compared with the case where the delay amount is searched only by his / her own sense. In order to obtain such an effect, the reproduction delay amount of the reproduction data is set or selected so as to change every predetermined constant value such as 10 milliseconds, 20 milliseconds, and 30 milliseconds. It is desirable to be able to do it.

  In addition, when the plasma display device 2 and the audio amplifier device 4 are used in combination, by using the synchronization adjustment system according to the third embodiment in advance, the moving images and the audio are adjusted to be synchronized, For example, when a movie, a concert, a recorded program, or the like is played on the disc playback device 2, it can be viewed without feeling a sense of incongruity due to a sound shift with respect to the moving image.

  In the third embodiment, the test data generation unit 102 outputs an analog audio sampling signal to the audio D / A conversion unit 33. In addition to this, for example, the test data generation unit 102 may output an analog audio signal to the audio input switching circuit 104. However, in this case, the test data generation unit 102 requires an audio D / A conversion unit (not shown) as a subsequent stage of the audio decoder. In addition, the analog audio signal output from the test data generator 102 is output to the audio D / A converter 33 via the digital delay circuit 29. Therefore, in the delay data setting mode, it is necessary to reset the delay data memory 28 at the beginning. When the delay data memory 28 is reset at the beginning of the delay data setting mode, even if the delay data setting mode is interrupted after that, the delay data memory 28 no longer stores the delay data used so far.

Embodiment 4 FIG.
The synchronization adjustment system according to Embodiment 4 of the present invention includes a plasma display device 3, an audio amplifier device 4, and a speaker 5. These connection relationships are the same as those in FIG.

  FIG. 11 is a block diagram showing a configuration of audio amplifier apparatus 4 according to Embodiment 4 of the present invention. The audio amplifier device 4 includes a remote control unit 111 as a part of a selection instruction input unit and a remote input unit, a light receiving unit 112 as a part of the selection instruction input unit and a reception unit, and a delay data setting unit 113 as a setting unit. And having.

  The remote control unit 111 is formed separately from the audio amplifier device 4, has operation buttons such as a numeric keypad and a selection button (not shown), and outputs numerical values and instructions based on operations on the operation buttons. The remote control unit 111 wirelessly transmits numerical values and instructions on infrared rays.

  The light receiving unit 112 receives infrared rays. The light receiving unit 112 extracts numerical values and instructions from the received infrared rays and outputs them.

  The delay data setting unit 113 stores the value of the reproduction delay amount output from the test data generation unit 102 in the delay data memory 28 as delay data.

  The other components of the audio amplifier device 4 have the same functions as the components of the same name of the audio amplifier device 4 of the third embodiment, and are described with the same reference numerals as those of the third embodiment. Is omitted. Further, the detailed constituent elements of the plasma display device 3 and the speaker 5 according to the fourth embodiment of the present invention have the same functions as the constituent elements of the same name according to the first embodiment. The same reference numerals as those in the first embodiment are attached and the description thereof is omitted.

  Next, an adjustment method for adjusting the synchronization between the plasma display device 3 and the audio amplifier device 4 using the audio synchronization system according to the fourth embodiment of the present invention will be described.

  First, the user uses the connection cable 8 to connect the analog video output terminal 22 of the audio amplifier device 4 and the analog video input terminal 11 of the plasma display device 3 as shown in FIG.

  After connecting the plasma display device 3 and the audio amplifier device 4 to each other, the user operates the remote control unit 111 to set the audio amplifier device 4 to the delay data setting mode. The remote control unit 111 transmits an instruction to set to the delay data setting mode by infrared transmission based on a user operation. The light receiving unit 112 of the audio amplifier device 4 receives the infrared light and outputs an instruction to set to the delay data setting mode to the mode determination unit 101.

  The mode determination unit 101 sets the audio amplifier device 4 to the delay data setting mode based on the instruction input from the light receiving unit 112. Specifically, the mode determination unit 101 causes the video input switching circuit 103 to select the test data generation unit 102, causes the audio input switching circuit 104 to mute the input signal, and instructs the test data generation unit 102 to start signal output. To do.

  The user operates the remote control unit 111 after setting the audio amplifier device 4 to the delay data setting mode. The remote control unit 111 transmits the value of the reproduction delay amount to the test data generation unit 102. Note that the remote control unit 111 may generate a predetermined reproduction delay amount value based on, for example, a user operation such as an up / down key (not shown) and transmit it by infrared rays. The light receiving unit 112 receives the infrared ray output from the remote control unit 111 and outputs the value of the reproduction delay amount included in the infrared ray to the test data generating unit 102.

  The test data generator 102 starts outputting an analog video signal and an analog audio sampling signal. The test data generation unit 102 starts outputting the analog audio sampling signal after a time corresponding to the value of the reproduction delay amount input from the light receiving unit 112 after starting the output of the analog video signal. Thereby, the plasma display apparatus 3 displays a moving image, and the speaker 5 outputs a sound. In addition, the test data generation unit 102 causes the display unit 24 to display the value of the reproduction delay amount of the output audio for the output moving image.

  The user views the moving image displayed on the plasma display device 3 and the sound output from the audio amplifier device 4. The user hears and compares the difference in how the video and audio are shifted.

  When the user determines that the moving image displayed on the plasma display device 3 and the predetermined sound output from the speaker 5 are not synchronized, the user operates the remote control unit 111. The remote control unit 111 generates and transmits a new reproduction delay value. The test data generation unit 102 outputs an analog video signal and an analog audio sampling signal with a numerical reproduction delay amount newly input via the light receiving unit 112. The plasma display device 3 and the audio amplifier device 4 output moving images and audio based on the new reproduction delay amount.

  Note that the remote control unit 111 generates a reproduction delay amount value obtained by increasing or decreasing the reproduction delay amount value set at the time of input by a predetermined value based on, for example, an operation such as an up / down key (not shown) by the user. The generated reproduction delay value may be transmitted.

  When the user determines that the moving image displayed on the plasma display device 3 and the predetermined sound output from the speaker 5 are synchronized, the user operates the remote control unit 111. This operation may be performed on a confirmation key (not shown), for example. The remote control unit 111 transmits a setting instruction. The light receiving unit 112 receives infrared rays including setting instructions, and outputs the setting instructions included in the infrared rays to the delay data setting unit 113.

  When a setting instruction is input from the light receiving unit 112, the delay data setting unit 113 acquires the value of the reproduction delay amount output by the test data generation unit 102 at that time, and uses the acquired value of the reproduction delay amount. The data is stored in the delay data memory 28 as delay data. With the above processing, the delay data setting mode ends.

  When delay data other than “0” is stored in the delay data memory 28 in the delay data setting mode, the digital delay circuit 29 is input from the audio A / D converter 32 in the normal mode thereafter. The digital value is delayed by a time corresponding to the value of the delayed data and output to the audio D / A converter 33. Therefore, the analog audio signal input to the analog audio input terminal 31 of the audio amplifier device 4 is delayed by the value stored in the delay data memory 28 and then output from the analog audio output terminal 35 to the speaker 5. The The speaker 5 outputs sound with a delay corresponding to the value. As a result, the moving image displayed on the plasma display device 3 and the sound output from the audio amplifier device 4 are synchronized.

  As described above, in the synchronization adjustment system according to the fourth embodiment, the test data generation unit 102 of the audio amplifier device 4 outputs moving images and audio with a certain reproduction delay amount value. Also, the delay data setting unit 113 of the audio amplifier device 4 stores the value of the reproduction delay amount output from the test data generating unit 102 in the delay data memory 28 as the delay data when the remote controller unit 111 issues a selection instruction. Remember. Therefore, the plasma display device 3 and the audio amplifier device 4 can be synchronized.

  In addition, in the synchronization adjustment system according to the fourth embodiment, the audio amplifier device 4 generates and outputs moving images and audio used for synchronization adjustment. For example, an analog video signal and an analog audio signal for synchronization adjustment are output. Can be adjusted without using a dedicated video and audio signal generator for generating

  As a result, the user who purchased the plasma display device 3 and the audio amplifier device 4 can easily perform the synchronization adjustment without purchasing a special dedicated device at home.

  In addition, since the user can select or set the playback delay amount of the audio for the video and play the playback data, the user can select or set the playback data in which the audio is delayed for the video. Therefore, it is possible to easily compare the deviation between the moving image and the sound when the reproduction delay amount is changed. The user can learn the degree of change in the deviation between the moving image and the sound when the reproduction delay amount is changed. Therefore, for example, a moving image and sound of a single time signal in which the moving image and the sound are synchronized are reproduced on the disc reproducing apparatus 2 and the like, and the amount of delay is adjusted under the circumstances, thereby matching the moving image and the sound. The user can easily determine whether or not the moving image and the sound match as compared with the case where the delay amount is searched only by his / her own sense. In order to obtain such an effect, the reproduction delay amount of the reproduction data is set or selected so as to change every predetermined constant value such as 10 milliseconds, 20 milliseconds, and 30 milliseconds. It is desirable to be able to do it.

  Further, when the plasma display device 2 and the audio amplifier device 4 are used in combination, by using the synchronization adjustment system according to the fourth embodiment in advance, the moving images and the audio are adjusted to be synchronized, For example, when a movie, a concert, a recorded program, or the like is played on the disc playback device 2, it can be viewed without feeling a sense of incongruity due to a sound shift with respect to the moving image.

  Each of the above embodiments is an example of a preferred embodiment of the present invention, but the present invention is not limited to this, and various modifications and changes can be made without departing from the spirit of the invention. It is.

  For example, in each of the above embodiments, an analog video signal and an analog audio signal are transmitted / received among the disk reproducing device 2, the plasma display device 3, and the audio amplifier device 4. In addition, for example, a digital video signal including at least a moving image and a digital audio signal including at least audio may be transmitted and received between the disk reproducing device 2, the plasma display device 3, and the audio amplifier device 4.

  Examples of signals that can be used as such digital video signals or digital audio signals include MPEG signals such as MPEG-TS. MPEG-TS can store moving images and audio. Therefore, when moving images and sounds are transmitted and received with digital signals in this way, moving images and sounds may be transmitted and received between the devices as one digital signal. In MPEG-TS, arbitrary information can be stored in the private stream. Therefore, the value of the audio reproduction delay amount for the video may be stored in this private stream and transmitted.

  FIG. 12 is a diagram showing a synchronization adjustment system in the case where the disk reproducing device 2, the plasma display device 3, and the audio amplifier device 4 are connected by an optical cable 121 compliant with the IEEE (the Institute of Electrical and Electrical Engineers) 1394 standard. . FIG. 12 shows only a video and signal transmission system. IEEE 1394 is a standard for connecting a plurality of devices with an optical cable 121 or the like and transmitting digital data between these devices. Other standards for transmitting digital data between devices include USB (Universal Serial Bus).

  In FIG. 12, the disc playback device 2 has a transceiver 122 that sends out an MPEG signal, and the plasma display device 3 and the audio amplifier device 4 have receivers 123 and 124 that receive the MPEG signal. An MPEG signal generated by the disk playback device 2 based on the playback data of the test disk 1 is transmitted from the transceiver 122 to the receivers 123 and 124.

  The MPEG signal separation unit 125 of the plasma display device 3 separates moving image data from the MPEG signal received by the receiver 123. The signal processing unit 13 generates two-dimensional image data for each display screen based on moving image data. As a result, a moving image based on the MPEG signal is displayed on the plasma light emitting display unit 15 of the plasma display device 3.

  The MPEG signal separation unit 126 of the audio amplifier device separates the MPEG signal received by the receiver 124 into an MPEG stream signal and a digital audio encoded signal. The digital delay circuit 29 delays the digital audio encoded signal based on the value of delay data stored in a delay data memory (not shown) and outputs the delayed signal. The delay extraction unit 23 extracts the value of the audio reproduction delay amount for the video from the private stream of the MPEG stream signal, and displays it on the display unit 24.

  As described above, in the synchronization adjustment system shown in FIG. 12, an MPEG signal having moving images and sounds is transmitted and received between the disk reproducing device 2, the plasma display device 3, and the audio amplifier device 4, and based on the moving images and sounds of the MPEG signals. Thus, the plasma display device 3 and the audio amplifier device 4 can be adjusted to be synchronized.

  FIG. 13 is a diagram showing a synchronization adjustment system when the plasma display device 3 and the audio amplifier device 4 are connected by an optical cable 121 compliant with the IEEE 1394 standard. FIG. 13 shows only a video and signal transmission system.

  The audio amplifier device 4 includes an MPEG test data generation unit 131 and a transmitter receiver 132. The MPEG test data generating unit 131 outputs an MPEG signal including moving images and audio for synchronization adjustment. The transmitter receiver 132 outputs the transmitter receiver 132 to the optical cable 121 and the MPEG signal separation unit 126. In the plasma display device 3, the receiver 123 receives the MPEG signal, and displays an image based on the MPEG signal on the plasma light emitting display unit 15.

  The MPEG signal separation unit 126 of the audio amplifier device 4 separates the MPEG signal input from the transmitter receiver 132. The digital delay circuit 29 delays the digital audio encoded signal based on the value of delay data stored in a delay data memory (not shown) and outputs the delayed signal. The delay extraction unit 23 extracts the value of the audio reproduction delay amount for the video from the private stream of the MPEG stream signal, and displays it on the display unit 24.

  As described above, in the synchronization adjustment system shown in FIG. 13, an MPEG signal having moving images and sounds is transmitted from the audio amplifier device 4 to the plasma display device 3, and the plasma display device 3 and the audio are transmitted based on the moving images and sounds of the MPEG signal. The amplifier device 4 can be adjusted to synchronize.

  In the first and third embodiments, the value of the audio reproduction delay amount for the moving image in the reproduction data is displayed on the display unit 24 of the audio amplifier device 4. In addition to this, for example, the value of the audio reproduction delay amount for the moving image in the reproduction data may be displayed on the disc reproduction apparatus 2 or the plasma display apparatus 3. In particular, in the display screen displayed on the plasma display device 3, the value of the audio reproduction delay amount for the moving image in the reproduction data may be displayed.

  In each of the above embodiments, the moving image and time signal of an analog clock are used as the moving image and sound in the reproduction data. In addition to this, for example, metronome videos and metronome sounds, videos of singers (no mouth) and their singing voices, videos of strings instruments such as violins (of the bow) and their tones, and percussion instruments such as drums A combination of a moving image and sound such as a moving image and its sound, a moving image that is reversed in black and white, and a sound corresponding thereto may be used as the moving image and sound that are common to the reproduction data.

  In each of the above-described embodiments, the plurality of reproduction data is composed of data in which the moving image and the sound are synchronized and data in which the sound is transmitted from the moving image. In addition to this, for example, a plurality of reproduction data may include data in which the sound is advanced from the moving image. Some recent audio amplifier devices use a DSP (Digital Signal Processor) or the like. Such audio signal processing takes a little time, but the output of the audio may be delayed by that amount of time. By including the reproduction data in which the sound is advanced from the moving image in the plurality of reproduction data, it is possible to adjust the moving image and the sound to be synchronized even in such a case.

  In each of the above-described embodiments, the plurality of reproduction data have combinations in which the reproduction delay amount is different every 10 milliseconds. In addition to this, for example, the plurality of reproduction data may have a combination in which the reproduction delay amount is different every 1 millisecond or a combination in which the reproduction delay amount is different every 100 milliseconds. In particular, the playback delay amount of the audio for the video input to the plasma display device 3 by making it possible to finely adjust the playback delay amount of a plurality of playback data to be stored inside the disc playback device 2 and the audio amplifier device 4. May be continuously variable.

  In the first and second embodiments, the video signal and the audio signal for synchronization adjustment are output from the disk reproducing device 2 that reproduces the test disk 1. In addition to this, for example, a television display device or a tuner device receives a broadcast radio wave in which video and audio are synchronized, and uses a video signal and an audio signal that are output based on the broadcast radio wave, thereby generating a plasma display device. And the synchronization with the audio amplifier device may be adjusted. Further, a video signal and an audio signal used for synchronization adjustment may be output from another playback device such as a hard disk recorder capable of recording and playing back audiovisual content.

  In each of the above-described embodiments, the case where the synchronization of video and audio is adjusted when the plasma display device and the audio amplifier device are combined has been described as an example. Other examples of the display device include a liquid crystal display device and a display device using a cathode ray tube. Even when these other display devices and audio amplifier devices are combined, based on signal processing within the device and the difference between the transmission path of the video signal and the transmission path of the audio signal, etc. There may be a gap between them. Even with such a combination of devices, it is possible to appreciate a movie or the like without feeling uncomfortable by adjusting the synchronization using the synchronization adjustment system according to each embodiment of the present invention. become.

  The present invention can be used in a home theater system or the like that uses a plasma display device and an audio amplifier device to synchronize their moving images and sound.

FIG. 1 is a diagram showing a synchronization adjustment system according to Embodiment 1 of the present invention. FIG. 2 is a block diagram showing a configuration of the plasma display device in FIG. FIG. 3 is a block diagram showing the configuration of the audio amplifier device in FIG. FIG. 4 is a block diagram showing the configuration of the disk reproducing apparatus in FIG. FIG. 5 is an explanatory diagram showing the relationship between the moving image and sound of one piece of reproduction data recorded on the test disc in FIG. FIG. 6 is a diagram showing a selection screen recorded as selection screen data on the test disc in FIG. FIG. 7 is a diagram illustrating another connection example of the synchronization adjustment system according to the first embodiment of the present invention. FIG. 8 is a block diagram showing a configuration of an audio amplifier apparatus according to Embodiment 2 of the present invention. FIG. 9 shows a synchronization adjustment system according to Embodiment 3 of the present invention. FIG. 10 is a block diagram showing the configuration of the audio amplifier device in FIG. FIG. 11 is a block diagram showing a configuration of an audio amplifier apparatus according to Embodiment 4 of the present invention. FIG. 12 is a diagram showing a modified example of the synchronization adjustment system in the case where the disk reproducing device, the plasma display device, and the audio amplifier device are connected by an optical cable. FIG. 13 is a diagram illustrating a modified example of the synchronization adjustment system when the plasma display device and the audio amplifier device are connected by an optical cable.

Explanation of symbols

1 Test disc (part of recording medium, video and audio signal generator)
2 Disc playback device (playback device, part of video and audio signal generator)
3 Plasma display device (display device)
4 Audio amplifier device (audio output device)
21 Analog video input terminal (part of signal input means, video input terminal)
22 Analog video output terminal (video output terminal)
24 Display section (display means)
26 Input section (numeric input means)
27 Delay data setting section (setting means)
28 Delay data memory (storage means)
31 Analog audio input terminal (part of signal input means)
35 Analog audio output terminal (Analog audio signal output means)
42 Optical pickup (reading means)
45 Input section (selection means)
49 Voice D / A converter (voice signal generating means)
50 Analog audio output terminal (part of signal output means)
53 Video D / A converter (moving image signal generating means)
54 Analog video output terminal (part of signal output means)
91 Remote control unit (part of selection instruction input means, remote input unit)
92 Light-receiving unit (part of selection instruction input means, receiving unit)
94 Delay data setting section (setting means)
102 Test data generator (signal generator)
103 Video input switching circuit (video input switching means)
113 Delay data setting section (setting means)

Claims (17)

  The video data recorded on the recording medium is a plurality of video data having a common moving image and common audio, and the video data is video data having different audio reproduction timings for the moving image, Further, reading means for reading out the data of the selection screen of the plurality of video data from the recording medium, selection means for selecting one of the plurality of reproduction data based on a user operation, reproduction selected by the selection means Reading means for reading data from the recording medium, moving image signal generating means for generating a moving image signal including at least the moving image based on the reproduction data read by the reading means, and the reproduction read by the reading means Audio signal generating means for generating an audio signal including at least the audio based on the data, and displaying a moving image A display device and a sound output device that outputs sound, and are readable by a playback device having a signal output means for outputting the moving image signal to the display device and outputting the sound signal to the sound output device. A characteristic recording medium.   A plurality of pieces of video information having a moving image and a common sound according to claim 1, wherein the image data is an image in which a delay amount of an audio signal accompanying the image is added with a character display as a video. A recording medium characterized by the above.   A recording medium comprising a plurality of pieces of video information having a moving image and a common sound according to claim 1, wherein the image data includes a delay amount of the set sound data in addition to the image. A recording medium according to claim 1 or 2,
Selection means for selecting one of the plurality of reproduction data based on a user operation, reading means for reading the reproduction data selected by the selection means from the recording medium, and the reproduction data read by the reading means A video signal generating unit that generates a video signal including at least the video based on the audio data generation unit, an audio signal generating unit that generates an audio signal including at least the audio based on the reproduction data read by the reading unit, and A playback device having a signal output means for connecting a display device for displaying a moving image and a sound output device for outputting sound, outputting the moving image signal to the display device and outputting the sound signal to the sound output device; A video and audio signal generator characterized by comprising: A video and audio signal generating device for reproducing a recording medium on which a moving image and audio having a preset audio reproduction delay amount for the moving image described in claim 2 is connected is connected. A signal input means for receiving an audio signal including at least recorded audio from the device and information indicating a value of a reproduction delay amount of the audio for the moving image;
Storage means for storing delay data;
Selection instruction input means for outputting a selection instruction based on a user operation;
A setting unit that stores a value of a reproduction delay amount of an audio for a moving image input to the signal input unit when the selection instruction input unit outputs a selection instruction;
An audio signal output unit that outputs an audio signal based on the audio signal input to the signal input unit with a delay indicated by the time indicated by the delay data stored in the storage unit;
An audio output device comprising: A video output terminal for outputting a video signal including at least a video;
A signal generation means for generating a video signal output from the video output terminal and an analog audio signal output from the audio output device by adjusting an audio reproduction delay amount in the analog audio signal for the video; and
Display means for displaying an audio reproduction delay value for the video generated by the signal generating means;
Storage means for storing delay data;
Numerical value input means for acquiring a numerical value input by the user based on the display of the display means;
Setting means for storing the numerical value input to the numerical value input means as delay data in the storage means;
Analog audio signal output means for outputting an analog audio signal based on the audio signal input to the signal input means, delayed by a time indicated by the delay data stored in the storage means, and
An audio output device comprising: A video output terminal for outputting a video signal including at least a video;
A signal generation means for generating a video signal output from the video output terminal and an analog audio signal output from the audio output device by adjusting an audio reproduction delay amount in the analog audio signal for the video; and
Storage means for storing delay data;
Selection instruction input means for outputting a selection instruction based on a user operation;
Setting means for storing the value of the reproduction delay amount of the sound for the moving image generated by the signal generating means when the selection instruction input means outputs a selection instruction;
Analog audio signal output means for outputting an analog audio signal based on the audio signal input to the signal input means, delayed by a time indicated by the delay data stored in the storage means, and
An audio output device comprising: The numerical value input means or the selection instruction input means is:
A remote input unit that is formed separately from the audio output device and wirelessly transmits a numerical value or a selection instruction in accordance with a user operation;
Receiving the numerical value or selection instruction transmitted by the remote input unit, and outputting the numerical value or the selection instruction based on the reception; and
8. The audio output device according to claim 5, wherein the audio output device includes: A video input terminal to which a video signal including at least a video is input;
Video input switching means for selecting one of the video signal input to the video input terminal and the video signal generated by the signal generating means and outputting the selected video signal to the video output terminal;
The audio output device according to claim 6, wherein: An audio output device according to claim 5;
Video and audio connected to the audio output device and outputting to the audio output device an audio signal including at least audio and information indicating a value of a reproduction delay amount of audio with respect to the moving image, and outputting a moving image signal including at least the moving image A signal generator;
A display device that is connected to the video and audio signal generator directly or via the audio output device and displays a video based on the video signal including at least the video output by the video and audio signal generator;
A synchronization adjustment system comprising:   11. The synchronization adjustment system according to claim 10, wherein the video and audio signal generator is the video and audio signal generator according to claim 4. An audio output device according to claim 6 or 7,
A display device connected to the audio output device and displaying a moving image based on the video signal output by the video and audio signal generator;
A synchronization adjustment system comprising: The video and audio signal generator according to claim 4,
An audio output device connected to the video and audio signal generator, outputting audio based on the audio signal output by the video and audio signal generator, and having a function of adjusting an audio output delay time;
A display device connected to the video and audio signal generator directly or via the audio output device and displaying a video based on a video signal output by the video and audio signal generator;
A synchronization adjustment system comprising: A method of adjusting synchronization between a display device that displays an image based on an input signal and an audio output device that outputs audio based on the input signal,
A plurality of reproduction data to be reproduced by the video and audio signal generation devices connected to the display device and the audio output device, having a common moving image and a common sound, and having a reproduction delay amount of sound with respect to the moving image Selecting one reproduction data from a plurality of different reproduction data;
The selected reproduction data is reproduced by the video and audio signal generation device, a moving image of the reproduction data is displayed on the display device, and the audio of the reproduction data is output from the audio output device, and the selected Displaying the value of the audio playback delay amount for the video in the playback data;
Storing the numerical value input to the audio output device in the audio output device as delay data indicating a time to delay an analog audio signal output based on the audio signal input by the audio output device; ,
A method for adjusting synchronization, comprising: A method of adjusting synchronization between a display device that displays an image based on an input signal and an audio output device that outputs audio based on the input signal,
A plurality of reproduction data to be reproduced by the video and audio signal generation devices connected to the display device and the audio output device, having a common moving image and a common sound, and having a reproduction delay amount of sound with respect to the moving image Selecting one reproduction data from a plurality of different reproduction data;
Reproducing the selected reproduction data with the video and audio signal generation device, displaying a moving image of the reproduction data on the display device, and outputting sound of the reproduction data from the audio output device;
When the audio output device is instructed to select, analog audio that the audio output device outputs the value of the audio reproduction delay amount for the moving image in the selected reproduction data based on the audio signal input thereto Storing in the audio output device as delay data indicating the time to delay the signal;
A method for adjusting synchronization, comprising: A method of adjusting synchronization between a display device that displays an image based on an input signal and an audio output device that outputs audio based on the input signal,
In the audio output device, a video signal for displaying a moving image on the display device and an analog audio signal output from the audio output device are generated by adjusting an audio reproduction delay amount in the analog audio signal for the video, and A step of displaying a value of an audio reproduction delay amount for the video;
The displayed numerical value is stored in the audio output device as delay data indicating a time for delaying an analog audio signal output based on the audio signal input to the audio output device based on a user operation. Steps,
A method for adjusting synchronization, comprising: A method of adjusting synchronization between a display device that displays an image based on an input signal and an audio output device that outputs audio based on the input signal,
In the audio output device, generating a video signal for displaying a moving image on the display device and an analog audio signal output from the audio output device by adjusting an audio reproduction delay amount in the analog audio signal with respect to the video;
The time for delaying the analog audio signal output by the audio output device based on the audio signal input to the value of the audio reproduction delay amount for the moving image generated when the audio output device is instructed to select Storing in the audio output device as delay data indicating:
A method for adjusting synchronization, comprising:

Images