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| Number | Title | Issue Date |
| 5541672 | Device for digital demodulation of video and audio elements of television signal A device for digital demodulation of the video and audio elements of a television signal has a digital preprocessing stage for conditioning a complex digital signal for digital demodulation of a television signal at intermediate frequency, mixing devices ... | 07/30/1996 |
| 5539477 | Video-signal transmitter-receiver and a signal transmission apparatus utilizing the same A signal transmitter and receiver (or a combination thereof) incorporated for example in audio and video apparatus such as a TV and a video-deck, comprises a synchronizing signal separator separating a synchronizing signal from video-signal, a monostable ... | 07/23/1996 |
| 5534933 | Apparatus for processing NTSC TV signals having digital signals on quadrature-phase video carrier A vestigial-sideband amplitude-modulation transmitter using a balanced modulator for generating a suppressed carrier that is in quadrature phasing with the video carrier of a television signal receives as modulating signal a binary phase-shift-keying (BPS... | 07/09/1996 |
| 5523525 | Performance recording and playback apparatus A performance recording and playback apparatus is provided between a performance apparatus and a video apparatus in an audio/video recording and playback system. The performance apparatus is capable of producing and reproducing performance data, while the... | 06/04/1996 |
| 5506370 | Display controlling apparatus for music accompaniment playing system, and the music accompaniment playing system In a music accompaniment playing system, MIDI (Music Instrument Digital Interface) sound source controlling data to control a MIDI sound source for generating accompaniment music information for music accompaniment playing, and display controlling data to... | 04/09/1996 |
| 5483298 | Circuit arrangement for demmodulating the sound signals in a television signal in accordance with at least two different transmission standards A circuit arrangement for demodulating the sound signals in a television signal is described, which circuit arrangement ensures a simple and low-cost structure, also for operation at different transmission standards. To this end, the circuit arrangement a... | 01/09/1996 |
| 5454723 | Karaoke apparatus and method for medley playback A karaoke apparatus for medley playback includes: playback unit for receiving playback information including MIDI sound source control information and producing acoustic sound of karaoke song on the basis of the playback information; information storage u... | 10/03/1995 |
| 5448299 | Apparatus for processing BPSK signals transmitted with NTSC TV on quadrature-phase video carrier A vestigial-sideband amplitude-modulation transmitter using a balanced modulator for generating a suppressed carrier that is in quadrature phasing with the video carrier of a television signal receives as modulating signal a binary phase-shift-keying (BPS... | 09/05/1995 |
| 5442452 | Sound mode switching method for multichannel selection and device thereof A sound mode switching method for multichannel selection a video tape recorder uses a first step of making judgements on the selections of a multi-voice mode setting key and a main picture switching key, a second step for deciding the sound mode and for s... | 08/15/1995 |
| 5426466 | Composite video signal with audio A method for inserting an audio signal (132) into a composite video signal (10) having a front porch (24), a back porch (26 or 32), a horizontal sync pulse (20) with a leading edge (22), and a luminance portion (16) to provide an audio-on-video signal (22... | 06/20/1995 |
| 5416525 | Method and apparatus for digitally coding and decoding a composite signal, containing baseband and out-of-band signals using relatively few bits and yielding a decoded out-of-band signal having increased quality A composite signal which comprises a video signal situated in the base band and a frequency-modulated audio signal situated outside the base band is coded by an N-bit pulse code modulator or an N-bit noise-shaped pulse code modulator with inadequate quali... | 05/16/1995 |
| 5416526 | Sound and image reproduction system Based on a series of video data for producing one or a plurality of text displaying images and a series of accompaniment MIDI data, a signal processing circuit (1) prepares a quasi video signal containing the two kinds of data as arranged in alternating f... | 05/16/1995 |
| 5351090 | Video and audio signal multiplexing apparatus and separating apparatus When transmitting an audio signal by multiplexing in a synchronous period of a video signal, a buffer memory for time axis adjustment of the audio signal is controlled. The number of audio signal samples in the buffer memory is detected in every n fields ... | 09/27/1994 |
| 5336844 | Information storage medium and apparatus for reproducing information therefrom An information storage medium such as a CD-ROM has a storage area divided into a plurality of sections, for storing digital audio information and for storing picture information and character information, which are stored independently of each other. The ... | 08/09/1994 |
| 5335073 | Sound and image reproduction system Based on a series of video data for producing one or a plurality of text displaying images and a series of accompaniment MIDI data, a signal processing circuit (1) prepares a quasi video signal containing the two kinds of data as arranged in alternating f... | 08/02/1994 |
| 5325127 | Process for transmitting digital data, in particular sound data, in a TV channel In a method of transmitting digitally coded information in a television sound channel, the digitally coded information is inserted on an existing frequency-modulated RF sound carrier as a channel-coded signal above the television audio-frequency base spec... | 06/28/1994 |
| 5310962 | Acoustic control apparatus for controlling music information in response to a video signal An acoustic control apparatus which can be applied to an electronic musical instrument controls the acoustics of a musical tone to be generated in response to variation of an image. In order to detect the variation of an image, the acoustic control appara... | 05/10/1994 |
| 5287180 | Modulator/demodulater for compatible high definition television system An NTSC bandwidth-compatible HDTV system employs multiple quadrature amplitude modulation (QAM). A first suppressed QAM carrier is modulated with high priority information including predominantly low frequency information. A second suppressed QAM carrier ... | 02/15/1994 |
| 5287182 | Timing recovery for variable bit-rate video on asynchronous transfer mode (ATM) networks Complications of timing recovery in an ATM receiver are overcome by employing a first phase lock loop including a phase comparator, filter, voltage controlled oscillator (VCO) and output counter to lock to systems clock reference (SCR) values which are as... | 02/15/1994 |
| 5243424 | Apparatus and method for the measurement of tuning delay between a video signal and an audio signal A system for the measurement of delay between a video signal and an audio signal includes a tone-burst generator circuit (9) which marks an audio signal (3). The mark is then used as a reference which is detected at both signals' destination (15) and the ... | 09/07/1993 |
| 5241538 | Transmission apparatus Satellite transmission sometimes uses a method of modulating by a sub signal a subcarrier with a frequency set higher than that of a main signal and subjecting the main carrier to frequency modulation by the resulting baseband signal. This method is, howe... | 08/31/1993 |
| 5231495 | Digital signal processing device to execute time-sharing multiplex or separation of a plurality of kinds of digital signals By providing a mediator for selectively permitting an access request of a first processing circuit for processing a first digital signal to a memory and an access request of a second processing circuit for processing a second digital signal whose bit rate... | 07/27/1993 |
| 5231492 | Video and audio multiplex transmission system A system is disclosed for multiplexing, transmitting, and receiving picture data and sound data, wherein the picture data and sound data are balanced in a limited transmission capacity so as to obtain a better overall quality to effectively use the transm... | 07/27/1993 |
| 5227876 | Method and system for transmitting packages of data A system and method for organizing and processing signals from multiple sources subdivides the source data into a plurality of processing paths. The data is stored in a buffer on each path in packages having fixed length words. A buffer controller control... | 07/13/1993 |
| 5225909 | Video signal reproducing system A video signal reproducing system has a video memory for storing a video signal fed from a source, a memory controller for controlling production of a video signal stored in the video memory, and a display for reproducing a video signal produced from the ... | 07/06/1993 |
| 5218454 | Apparatus for improved recording of signals having video and audio components A signal recording apparatus for recording a TV signal in which an audio signal such as a MUSE signal and a video signal are multiplexed in a time sharing manner in units of a given period of time, is arranged to code these video and audio signals alike, ... | 06/08/1993 |
| 5212551 | Method and apparatus for adaptively superimposing bursts of texts over audio signals and decoder thereof An apparatus is disclosed for adaptively superimposing bursts of text over audio signals comprising an encoder and a decoder wherein said encoder comprises means for separating unencoded audio signals into discrete passbands; means for measuring power lev... | 05/18/1993 |
| 5198904 | Aural carrier correction system and method A system and method reduce unwanted aural carrier modulation caused by the visual signal in a common amplification television transmitter which amplifies both an aural signal and the visual signal simultaneously. A non-linear amplitude domain video signal... | 03/30/1993 |
| 5153723 | HDTV audio subsystem with timing characteristics compatible with video subsystem An audio subsystem for use in an HDTV broadcast system includes a sampler for sampling an analog audio signal at a sampling rate of 3H, where H is the NTSC horizontal scanning frequency. The sampled audio signal is formatted into repetitive blocks which a... | 10/06/1992 |
| 5101274 | Digital signal recording apparatus time-division multiplexing video and audio signals A digital signal recording apparatus includes first circuitry for forming digital video data, and second circuitry for forming digital audio data. Third circuitry is provided for forming (a) video synchronizing blocks each of which comprises a predetermin... | 03/31/1992 |
| 5097333 | Interframe deinterleave switching circuit In processing the transfer of digital voice signals, an interframe deinterleave switching circuit automatically switches the interleaving length without requiring any switching signal from the external unit. The circuit detects a voice synchronizing signa... | 03/17/1992 |
| 5079525 | Audio-video modulator system on IC chip An RF modulator comprising an FM modulator supplied with an audio signal, and AM modulator supplied with the FM modulator output and a video signal, an oscillator for generating a sound subcarrier signal, and an oscillator for generating a main carrier si... | 01/07/1992 |
| 5063446 | Apparatus for transmitting auxiliary signal in a TV channel Apparatus for converting a signal having a substantially continuous frequency spectrum to a signal having its energy concentrated at multiples of the line frequency of a video signal, includes circuitry for apportioning the signal into two intermediate si... | 11/05/1991 |
| 5047860 | Wireless audio and video signal transmitter and receiver system apparatus A wireless audio and video signal transmitter and receiver system apparatus capable of accepting both external baseband audio and video signal inputs and a modulated external audio/video signal modulated at a particular television channel. A transmitter t... | 09/10/1991 |
| 5045940 | Video/audio transmission systsem and method The invention is a data pipeline system which synchronizes the display of digitzed audio and video data regardless of the speed at which the data was recorded on its linear medium. To do this, the video data is played at a constant speed, synchronized by ... | 09/03/1991 |
| 5014125 | Television system for the interactive distribution of selectable video presentations An interactive television system employs a telephone connection in a two-way manner to send command signals from a viewer to a central controller to select various presentations and to send the audio portion of such presentations from a central location t... | 05/07/1991 |
| 4975775 | Tuner for receiving television signal in frequency division multiplex system and television signal in time division multiplex system A tuner for use in two systems utilizes a determining circuit to determine whether or not a baseband signal, after demodulation includes a sound carrier. If a sound carrier is present, the determining circuit determines that the received television signal... | 12/04/1990 |
| 4963967 | Timing audio and video signals with coincidental markers A method for timing audio and video component signals of a television signal with coincidental markers generates a field pulse every Nth field of the televison signal at the transmitter. The duration of the field pulse is approximately one video field, an... | 10/16/1990 |
| 4959827 | Laser signal mixer circuit A circuit for mixing audio, video and data signals for transmission by laser link. The data signal is first modulated by frequency shift keying and then, after passing through a bandpass filter, is mixed with the audio signal and then frequency modulated ... | 09/25/1990 |
| 4956862 | Method of providing sound privacy system compatible with mono and btsc stereo audio In order to provide secure access to the audio portion of a television signal, the audio portion of a TV signal is modulated at a frequency that is offset from the standard carrier frequency. In the embodiment disclosed herein, the audio portion of the TV... | 09/11/1990 |
