Abstract: Provided is an information processing device including an audio adjustment unit configured to adjust focus values each indicating a degree of highlighting of audio data of each content displayed in a plurality of display areas.

Abstract: According to the present invention, the sound quality of an apparatus having HDMI outputs exclusive for both of an audio signal and a video signal can be further improved. According to the present invention, even when the calculated value of CTS obtained using a first video clock signal Vc1 generated by a decoder 204 is other than an integer, a value of a second video clock signal Vc2 and an N value are set such that the calculated value of CTS obtained using the second video clock signal Vc2 is an integer. By using the value of second video clock signal Vc2 and the N value set in this manner, an audio reproducing apparatus 103 can generate an audio clock signal Ac having reduced jitter.

Abstract: Provided are an electronic device and an operating method thereof. When a predetermined event occurs while contents are being output, a video and a sound of the contents are controlled to be respectively output through different electronic devices, thus improving a content provision environment for a user.

Abstract: An audio output apparatus which outputs an audio signal to an audio control apparatus controlling processing of the audio signal, and to which an external device having an external terminal is connectable includes an output terminal, a detecting section, a generating section, and a transmitting section. The output terminal is connected with the external terminal and outputs the audio signal to the external device via the external terminal. The detecting section detects whether or not the external terminal is connected to the output terminal. The generating section generates a control signal based on a result of the detection by the detecting means. The transmitting section transmits the generated control signal to the audio control apparatus in order that the audio control apparatus controls the processing of the audio signal based on the control signal.

Abstract: A broadcast receiving apparatus in the present invention includes: a first audio data characteristics extracting unit extracting a first soundless period and first interval information from first audio data included in the first service; a second audio data characteristics extracting unit extracting a second soundless period and second interval information from second audio data included in the second service; a simulcast determining unit determining whether or not the broadcast waves are simulcast by comparing the first interval information with the second interval information; and a broadcasting switching control unit switching between (i) the output of the audio data and the video data included in the first service and (ii) the output of the audio data and the video data included in the second service based on a result of the determination by the simulcast determining unit.

Abstract: A fully customizable system and method for producing videos utilizing a decentralized business model for receiving input parameters from the customer or user and for presenting production elements for selection based on the input parameters. The system providing feedback by calculating, a cost, a delivery date, and/or the required raw video source material, as the customer or user makes production element selections. The customer or user is further provided with specific direction as to which and how many raw source materials are to be gathered for the video production.

Abstract: A broadcast receiver and a method for eliminating audios signal noise are provided. The broadcast receiver includes: an input unit which receives an audio signal and a video signal; an audio signal processor which processes and outputs the audio signal; and a controller which controls the audio signal processor so that an output level of the audio signal is lower than or equal to a preset comparative signal level for a preset period of time from an output time or an output stop time of the video signal.

Abstract: A television broadcast receiving apparatus has a demodulating unit including a PLL part synchronizing a phase of an IF signal with a phase of an internally generated carrier signal and outputting an out-of-synchronization flag signal when the IF signal and the carrier signal are in an unsynchronized state, and a muting part muting a sound intermediate frequency signal and outputting a noise signal of a predetermined level when the out-of-synchronization flag signal is outputted from the PLL part. Therefore, even when an IF amplifier of a tuning unit amplifies a noise at the maximum gain when there is no signal, an abnormal sound can be prevented from being outputted from a speaker of a decode and output unit.

Abstract: Presented is a method of facilitating use of an audio communication device, such as a telephone, in the presence of an electronic device capable of generating sound, such as a television or audio receiver. In the method, a message is received from the audio communication device, wherein the message indicates the audio communication device has received a request for an audio communication, such as a telephone call, from a second audio communication device. In response to receiving the message, an audio volume of the electronic device is reduced.

Abstract: A device linkage apparatus, which reduces the operating load on a user and causes a television and an amplifier to be appropriately linked, includes: a correspondence table storage unit in which is stored a mode correspondence table indicating, for each TV-program genre, the audio output mode corresponding to the genre; an attribute obtainment unit which obtains the genre of a TV-program to be reproduced; a mode identification unit which identifies, from among the audio output modes indicated in the mode correspondence table, the audio output mode that corresponds to the genre obtained by the attribute obtainment unit; and a linkage execution unit which causes the operations of a television and an amplifier to be linked accordance to the audio output mode identified by the mode identification unit.

Abstract: A video-audio playing system relating to 2-view application and a method thereof are provided. In the present invention, sound signals respectively corresponding to two independent image frames are captured and played in coordinating with the displaying of these two independent image frames. Accordingly, two users can respectively watch two image frames which are different and irrelevant each other in the same display, and further respectively hear sound effects of the respective image frames at the same time.

Abstract: Provided is an analog front end of a digital TV, a digital TV system having the same, and a method of operating the same. The analog front end includes: a first selection circuit which selectively outputs differential sound intermediate frequency signals or differential TV broadcast signals in response to a first selection signal; a second selection circuit which outputs a clock signal among a plurality of clock signals having a different sampling frequencies, in response to a second selection signal; and an analog-to-digital converter which converts output signals output from the first selection circuit to a digital code, according to a sampling frequency of a clock signal output from the second selection circuit.

Abstract: Systems and methods that facilitate the use and operation of a television with an integrated sound projection system. The sound projector preferably comprises an array of speakers configurable to project beams that reflect off the walls and ceiling to create surround sound. In one embodiment, sound can be projected and/or the television can be oriented automatically as a function of the location of the television remote control unit.

Abstract: Systems and methods that facilitate the use and operation of a television (TV) with an integrated sound projection system. The sound projector preferably comprises an array of speakers configurable to project beams that reflect off the walls and ceiling to create surround sound. In one embodiment, the user can use a graphical user interface-base menu system to move the sound beams around the viewing room while being presented with a graphical representation of the same. In another embodiment, a TV remote control unit can be equipped with a embedded microphone and microprocessor control to measure the audio level and transmit the level back to the TV to be used to automatically setup audio levels and delays in surround systems. In another embodiment, individual audio settings could be saved per each activity for a preferred viewing experience for a given activity.

Abstract: Disclosed herein is an analog television broadcast signal receiving apparatus including: a tuner section configured to convert an analog television broadcast signal into a predetermined intermediate frequency band signal; a demodulation circuit section configured to obtain a picture output signal and a sound intermediate frequency signal from the predetermined intermediate frequency band signal coming from the tuner section; a picture processing circuit section configured to convert the picture output signal into a display-ready picture signal; a sound demodulation processing circuit section configured to demodulate the sound intermediate frequency signal; and a control section.

Abstract: According to one embodiment of the invention, an electronic apparatus comprises a receiving module, a configuration module, a selection module and a control module. The receiving module is configured to receive video information containing a plurality of pieces of audio information in different languages. The audio information is compressed in arbitrary audio compression formats. The configuration module is configured to control the display of a configuration screen for enabling an adjustment of an audio volume for each of the audio compression formats by a user. The selection module is configured to control the display of a selection menu for enabling a selection of languages, namely select a language for audio output among the languages being displayed while the received video information is displayed. The control module is configured to adjust the audio volume according to the selected language referring to a configuration set by the configuration module.

Abstract: A portable navigation device with a TV function includes a TV module, a navigation module, a display module, a sound module, a first processing unit, a second processing unit and a TV command storage module. The TV module generates baseband TV signals, the navigation module generates position information, the display module displays image information, the sound module plays sounds, the first processing unit performs navigation programs, the second processing unit performs TV programs, and the TV command storage module stores TV commands from the first processing unit and the second processing unit. TV command transmission between the first processing unit and the second processing unit is achieved by sending interrupt signals or reset signals.

Abstract: Sound control circuit comprising a game port, installed on a digital audiovisual reproduction system managed by an operating system, characterized in that the game port in the sound control circuit is used to create an access to the configuration of the audiovisual reproduction system and/or additional management functions for the audiovisual reproduction system.

Abstract: An audio/video apparatus such as a television apparatus includes two or more auxiliary audio inputs (AUX1, AUX2, and AUX3) for receiving respective audio signals, an audio output, and a switch arrangement for selecting one of a broadcast audio signal and the auxiliary audio input signals. The audio/video apparatus operates in two modes. In the first mode where the audio/video apparatus is turned on, the switch arrangement selects one of the auxiliary audio input signals and a broadcast audio signal in response to a user command, and in the second mode where the audio/video apparatus is turned off, the switch arrangement selects a pre-determined one of the auxiliary audio input signals.

Abstract: A sound output device of the present invention for outputting sound according to audio data fed thereto includes: a volume adjuster that is operated by a user in a predetermined manner, and that determines a ratio of volume of the sound to predetermined reference volume according to how it is operated by the user; a time detector detecting that a predetermined time has come; and a reference volume adjuster adjusting the reference volume according to a detection result of the time detector. Thus, the maximum level of the volume (which is dependent on the reference volume) can be automatically adjusted according to the current time. The volume adjuster determines the ratio of volume to reference volume according to the operation by the user. Thus, for example, the same operation performed by the user even under different levels of reference volume produces almost the same ratio of volume to reference volume.

Abstract: A child's sleep assistant device is provided for assisting a child with falling asleep by playing calming images and soothing sounds. The device comprises a main body, a projection assembly, an audio assembly, a translucent dome and a power source. The projection assembly, audio assembly and power source are housed within the main body, which is covered by the translucent dome. Animated scenes are projected by a digital projector onto the wall or ceiling of a child's bedroom. Corresponding audio may be played that corresponds to the animated scenes, or soothing music or bedtime stories. The scenes may be changeable and their size and intensity modified by a parent or caregiver.

Abstract: To provide a sink device that outputs image data and audio data separately when outputting the audio data by using an ARC function, the present invention discloses a sink device that receives image data through an HDMI input port connected to an HDMI cable comprising, an audio input section to receive plural audio data, an HDMI reply section that complies with an ARC function to transmit the received audio data from the HDMI input port, and a control section that receives a selection of the input audio data input to the audio input section and outputs the selected audio data from the audio input section to the HDMI reply section.

Abstract: A television receiver includes a tuner, a bandpass filter, an intermediate frequency amplifier and a demodulator. The tuner has an input to receive radio frequency signals and an output to provide modulated analog and digital television signals at an intermediate frequency. The bandpass filter and the intermediate frequency amplifier provide a singular signal path to filter and amplify both the modulated analog and digital television signals at the intermediate frequency. The demodulator has a singular input coupled to the output of the intermediate frequency amplifier and a plurality of outputs. The plurality of outputs includes a first output to provide demodulated analog television signals in response to the output of the tuner providing modulated analog television signals at the intermediate frequency and a second output to provide demodulated digital television signals in response to the output of the tuner providing modulated digital television signals at the intermediate frequency.

Abstract: Practical speaker connection is identified using a device having a sound channel of a 5.1 channel or 7.1 channel, and a device is provided that can easily reproduce the optimum multiple channels. Actual speaker arrangement can be identified by, for example, measuring the impedance of a terminal at the side of an audio amplifier. If incorrect connection is found, a warning is issued. This information is transmitted to a signal source with an EDID and a signal with the optimum a number of sound channel is sent. The EDID is also used for the connection with a display unit and the speaker connection with which the display unit is provided uniquely. For example, a sound through the 7.1 channel is easily reproduced using the speaker of the display unit in the channel of the front speaker.

Abstract: An apparatus for positioning a screen sound source, a method of generating loudspeaker set information for screen sound source positioning, and a method of reproducing a positioned screen sound source are provided. The apparatus and methods relate to a screen sound source positioning technique. A plurality of loudspeakers, each configured to have approximately the same gain, are each disposed proximate to the edge of a display, and a loudspeaker set including at least two of the loudspeakers is selected to position a virtual sound source substantially synchronized with a visual object displayed at a position on the screen of the display. Accordingly, a virtual sound source may be positioned at a certain specific position on the screen of a display without sound source distortion.

Abstract: A multimedia television system is disclosed. The multimedia television system comprises a receiver, a detector, an audio processing/controlling device, and a mixing device. The receiver receives an audio/video signal comprising an audio signal and a video signal and outputs the audio signal and the video signal respectively. When an external upgrading/transmitting device is connected to the detector, the detector will generate an upgrading signal. When the audio processing/controlling device receives the upgrading signal, the audio processing/controlling device will process the audio signal into a multi-channel audio signal comprising front sub-audio signals and rear sub-audio signals according to the upgrading signal. Then, the mixing device processes the rear sub-audio signals into at least one mixed audio signal. The detector receives the at least one mixed audio signal and transmits the at least one mixed audio signal via the external upgrading/transmitting device.

Abstract: A system and method are provided for decoding an audio signal. In one embodiment, a first pulse is identified with a predetermined relative duration with respect to a second pulse. A sampling frequency is then calculated based on such identification. In another embodiment, an audio signal is decoded utilizing a threshold. In still yet another embodiment, a decoder is provided for decoding an audio signal utilizing a clock that is independent of the audio signal.

Abstract: A plural-channel audio signal (e.g., a stereo audio) is processed to modify a gain (e.g., a volume level or loudness) of an estimated dialogue signal (e.g., dialogue spoken by actors in a movie) relative to other signals (e.g., reflected or reverberated sound). In some aspects, a controller is used to control master volume and dialogue volume. In some aspects, one or more graphical objects and/or user interface elements are used to indicate volume levels and other information.

Abstract: A sound-IF demodulator including a first demodulating unit and a second demodulating unit and a sound-IF detecting method thereof are provided. A sound de-matrix unit is adapted to generate a driving signal by de-matrixing outputs of the sound-IF demodulator. The first demodulating unit generates a first demodulated signal to the sound de-matrix unit by demodulating the first carrier signal. The second demodulating unit detects the signal quality of the sound signal and generates a second demodulated signal to the sound de-matrix unit and/or the first demodulating unit by demodulating the second carrier signal. When the second demodulating unit is idle, the second demodulating unit is programmed to select a corresponding standard among a plurality of predetermined standards for the sound signal according to the signal quality of the sound signal, so that the sound-IF demodulator is programmed to demodulate the sound signal in the corresponding standard.

Abstract: A method and apparatus for automatic audio standard detection in terrestrial broadcast signals is disclosed. In one embodiment, a method of detecting automatic audio standard for terrestrial broadcast includes scanning for each known audio frequency standard of interest in a current band energy spectrum in an incoming broadcast signal using a standard of non standard energy estimation algorithm, such as Goertzel DFT or FFT based algorithm for a predetermined time interval. At each known audio frequency standard of interest, energy is computed using the associated standard or non standard energy estimation algorithm within the predetermined time interval. The computed energy at each known audio frequency standard of interest is then compared to predetermined threshold energy. At each known audio frequency standard of interest, it is determined whether the audio frequency standard of interest is detected based on the outcome of the comparison.

Abstract: A unitary multi-panel display device is described that includes a housing, a single inner operating component, and at least two displays installed in the housing for viewing to video or other images displayed thereon and listening to audio content played thereon. The display device can be a television, a computer monitor, a handheld computing device, a handheld gaming device, a handheld multimedia device, or any other suitable device that can be used to view video or to view and listen to multimedia content. The singular device allows the viewing of the same or different programs from opposite sides of the device, for example, viewing of the at least two displays from points of view facing anterior and posterior sides of a television embodiment of the device. The single inner operating component is capable of playing the same or different audio/video sources on the at least two displays.

Abstract: The present invention relates to a television receiver including a controller, which indicates a plurality of selectable items being involved in contents of a program displayed on a screen, a memory, which holds a plurality of predetermined audio settings corresponding to the plurality of selectable items, and a processor which selects an audio setting from the plurality of predetermined audio settings and outputs the selected audio setting corresponding to an item selected from the plurality of selectable items.

Abstract: An image processing apparatus, a sound processing method used for an image processing apparatus, and a sound processing apparatus are provided. The image processing apparatus includes a signal receiver which receives an image signal and an audio signal; an image processor which processes the image signal received by the signal processor to be displayed; and a sound processor which determines a first channel signal and a second channel signal corresponding to positions which are symmetrical based on a standard axis from the audio signal of each channel received by the signal receiver, and processes the first channel signal and the second channel signal based on a change in an energy difference between the first channel signal and the second channel signal.

Abstract: In switching a channel or in switching an external input, a reduction in a psychological strain on a user is offered. An image generating unit 22 generates image data indicating a lapse of time on the basis of time information received from a control unit 30 and supplies it to a combining unit 21. The combining unit 21 combines image data stored in a storage unit 25 and the image data indicating the time information from the image generating unit 22 to generate video data and supplies the video data to a video switching unit 16. The video switching unit 16 selects video data from a video decoder 14, the video data from the combining unit 21, or video data from a determination unit 24 on the basis of the control of the control unit 30 and outputs it to the display unit 18. For example, when a user switches a channel by operating an operating unit 31, muting is performed, the video data from the combining unit 21 is selected, and video indicating a lapse of time is displayed on the display unit 18.

Abstract: It is an object of the present invention to provide a television receiver for discriminating a CM broadcast from a received television broadcast and controlling a volume of the CM broadcast without complicating a configuration of a discriminating process of the CM broadcast. The present invention includes a silence detection means, a scene change detection means, a video audio changing point detection means, a first characteristic amount extraction means, a second characteristic amount extraction means, a comparison determining means and a volume control means. The comparison determining means compares the first characteristic amount which is an audio characteristic amount of a television signal before the time when the video audio changing point is detected, and the second characteristic amount which is an audio characteristic amount of a television signal after the time when the video audio changing point is detected, to determine whether a predetermined condition is satisfied or not.

Abstract: A removable video module for a backlit liquid crystal display (LCD) contained within a chassis and having a timing and control board (TCON) with a board edge connector and an access opening in the chassis. The module preferably having a video input connection and means for generating a Low Voltage Differential Signaling (LVDS) video. The video module also preferably has a board edge connector adapted to connect with the board edge connector on the TCON, where the video module is adapted to fit through the access opening to connect with the TCON. Other embodiments may utilize a backplane where the video module and a power module are adapted to connect with the backplane and electrically communicate with the rest of the display. Outputs for either the video signal, power supply, or both may be provided so that a plurality of displays may be daisy-chained together.

Abstract: An apparatus and method of automatically compensating audio volume in response to a channel change. The method includes generating a gain value to adjust a level of an input audio signal by comparing an average level of the input audio signal with a predetermined input/output level curve, adjusting an audio volume of the input audio signal by applying the generated gain value to the level of the input audio signal, and adjusting a dynamic range of the audio signal having the adjusted audio volume.

Abstract: The invention prevents unwanted sounds from being outputted from an AV output apparatus such as a HDTV receiver. In the invention, when a streaming signal of a predetermined format having video data and audio data is inputted to a streaming input terminal 10, separation unit 23 of a relay apparatus 2 separates this signal into the video data and audio data. HDMI transmitter 27 generates and outputs a streaming signal having the video data separated by the separation unit 23, of the same format as that of the streaming signal inputted to the streaming input terminal 10.

Abstract: An external speaker control apparatus causes only one of an internal speaker and an external speaker to output audio when a power supply of the external speaker control apparatus which controls the external speaker changes from an off state to an on state, the external speaker being a speaker outside a video and audio output apparatus. The external speaker control apparatus includes a microcomputer for detecting the change of the power supply of an amplifier from an off state to an on state and a HDMI/CEC communication unit or outputting an instruction requesting output of information which indicates the audio output mode to the video and audio output apparatus while at the same time receiving the information indicating the audio detects the change of the power supply from an off state to an on state, wherein the microcomputer controls the output of the audio from the external speaker according to the information indicating the audio output mode.

Abstract: When an abnormality occurs in a supply circuit and its output is decreased, a protect circuit detects the abnormality and outputs a protect signal to an audio circuit. The audio circuit upon detection of the protect signal stops outputting audio so that outputting of an audio noise due to a deficiency in the supplied voltage is prevented. Meanwhile, when no abnormality occurs in the supply circuit, a microcomputer controls the audio circuit by supplying it with such a signal as to allow it to output an audio, or to increase the audio volume, or with a mute signal.

Abstract: A television (10) includes: a WiHD-RX (11) which receives signals transmitted from a camcorder (20) and a BD system (30); an orientation detection unit (102) which detects information indicating a relative position between a WiHD-TX (21) and a WiHD-RXTX (31); a communication status obtainment unit (104a) which obtains communication status information indicating whether or not it is possible to transmit a video signal or an audio signal from one of the camcorder (20) and the BD system (30) to the other; and a change information generation unit (104b) which generates, based on a detection result of by the orientation detection unit (102), and outputs change information when the communication status information indicates that the transmission is not possible. The change information indicates a direction for moving a communication range of the video signal or the audio signal from the WiHD-TX (21) closer to the WiHD-RXTX (31).

Abstract: While a user of a digital television gives a command to switch from a first channel to a second channel, a comparison between a first remembered volume of the first channel and a second remembered volume of the second channel is provided. According to the result of the comparison, a currently-used volume of the second channel may be adjusted from the first remembered volume to the second remembered volume iteratively and by step volumes so that the adjustment of the currently-used volume of the later channel is not annoying for the user. Moreover, the user is also allowed in determining a preferred volume to be the currently-used volume of the second channel. While the user of the digital television flips between channels, unnecessary updates in a volume setting of the second channel are abandoned.

Abstract: A television set includes: an internal speaker which outputs sound; a memory which holds information; a remote controller receiver which receives an instruction from the outside of the television set; a microcomputer which causes, based on a mode specifying instruction for specifying a sound output mode received by the remote controller receiver, the memory to hold any one of (a) information that indicates a first sound output mode in which sound is outputted from the internal speaker and (b) information that indicates a second sound output mode in which sound is outputted from an external speaker that is a speaker outside the television set; and an HDMI/CEC communication unit which outputs the information that indicates the sound output mode and that is held by the memory, to an amplifier which controls to operate or not operate the speaker outside the television set.

Abstract: According to one embodiment, a broadcast receiving apparatus includes a receiving module configured to receive a broadcast signal; a storage configured to store audio files and video files; a reading module configured to determine whether the broadcast signal received is an audio signal or a video signal, and to read a video file or an audio file from the storage according to a result of determination; and a playing back module configured to play back audio and video on the basis of the broadcast signal and one of the video file and the audio file read by the reading module.

Abstract: Embodiments are disclosed that relate to private video presentation. For example, one disclosed embodiment provides a system including a display surface, a directional backlight system configured to emit a beam of light from the display surface and to vary a direction in which the beam of light is directed, and a spatial light modulator configured to form an image for display via the directional backlight system. The system further includes a controller configured to control the optical system and the light modulator to display a first video content item at a first viewing angle and a second video content item at a second viewing angle.

Abstract: There is provided an audio amplifier, including: an AV signal acquisition unit that acquires an AV signal; a television connection unit to which a television receiver is connected; a first audio amplifying circuit to which a speaker is connected; and a control unit. The control unit transmits to the television receiver a command to shut off power for a second audio amplifying circuit of the television receiver when outputting the video signal of the AV signal acquired by the AV signal acquisition unit from the television connection unit toward the television receiver and when inputting the audio signal of the AV signal to the first audio amplifying circuit. The control unit shuts off power for the first audio amplifying circuit when outputting the video signal and the audio signal of the AV signal from the television connection unit toward the television receiver.

Abstract: An audio processing system which allows a surround sound system to utilize the transmission bandwidth efficiently by adaptively transmitting a supplementary data from a secondary source in addition to the audio signals of a primary source. The system consists of a transmitter component, capable of transmitting audio signals from a primary source and adaptively inserts supplementary data of the secondary source in the reserved communication bandwidth. The transmitter inserts headers in the channels used by the supplementary data to allow the receivers to identify the channel allocation between the primary source and the secondary source. Another part of the audio processing system is that of a receiver component which is capable of discriminating between data from the primary source and data from the secondary source.

Abstract: A multimedia television is provided. The multimedia television includes a video playback apparatus, an audio processing device, M front loudspeakers, a rear audio playback apparatus, and a mixing device. The video playback apparatus is used for displaying a video signal. The audio processing device processes an audio signal into a multi-channel audio signal consisting of M front sub-audio signals and N rear sub-audio signals. Each front loudspeaker plays back one corresponding front sub-audio signal. And, the mixing device mixes the N rear sub-audio signals into a mixed audio signal, which is then wirelessly transmitted to the rear audio playback apparatus. After the mixed audio signal is processed into N rear sub-audio signals, N rear loudspeakers in the rear audio playback apparatus playback the N rear sub-audio signals.

Abstract: An audiovisual apparatus includes a video projection section, a focal length adjustment section, an acoustic processing section, and an audio output section. The video projection section projects video corresponding to a video signal. The focal length adjustment section adjusts a focal length of the projected video. The acoustic processing section performs acoustic processing corresponding to the adjusted focal length, on an audio signal corresponding to the video signal. The audio output section outputs the audio signal on which the acoustic processing is performed.

Abstract: There is provided an amplifier that measures a display delay time caused until a video is displayed actually after a video signal is generated, and sets automatically a delay time of an audio signal such that an audio synchronizes with this display. Test video data is stored in a memory 11. This test video data is video data that generates a clear change in luminance in such a manner that a screen is changed suddenly from deep black to pure white. This test video is output to a video display device 2 such as PDP, for example, and a delay time generated until the test video is displayed actually after this test video is output is measured. Since the luminance of the screen is changed suddenly when the test video is displayed actually, this change can be sensed by an optical sensor 20. The audio signal is delayed by setting this delay time in an audio signal processing portion 13, so that the video can synchronize with the audio.