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Ken Olsen, chairman and founder of Digital Equipment Corporation ; 1977
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| Number | Title | Issue Date |
| 4614972 | Teletext receiver A teletext receiver incorporating a demodulation circuit, a data demultiplexing circuit, a memory, a microprocessor and a numbering keyboard. The inventive receiver also comprises an early article acquisition decision circuit disposed between the demultip... | 09/30/1986 |
| 4605964 | Method and apparatus for editing the output of a television set In order to enable the editing of television programs in the home to exclude undesired sound or visual events (such as swearing or scenes of violence), these events are identified by coding inserted in the television signal prior to mass distribution. Pre... | 08/12/1986 |
| 4595951 | Teletext decoder using a common memory A teletext decoder extracts digital information from a video signal for displaying graphics and textual information embedded in the video signal. The decoder includes a prefix processor responding to user supplied commands for selecting and storing the pe... | 06/17/1986 |
| 4554584 | Video and audio blanking system An auxiliary circuit for remote control of television receiver blanking (audio and video) by digital code words transmitted as part of the video signal. The circuit detects and decodes the transmitted code and depending upon the code received, blanks eith... | 11/19/1985 |
| 4538174 | Two-way subscriber TV system with multiple subscriber's sets A communications system comprising at least one exchange, television signal sources located at the exchange, subscriber's units each connected to the exchange by a respective direct communications link and provided with a television signal receiver, and s... | 08/27/1985 |
| 4536791 | Addressable cable television control system with video format data transmission An addressable cable television control system controls television program and data signal transmission from a central station to a plurality of user stations. The data signals include both control and text signals in video line format which are inserted ... | 08/20/1985 |
| 4532557 | Synchronous programmable parallel-to-serial data converter and a programmable longitudinal time code generator utilizing the converter A programmable time code generator utilizes a synchronous parallel-to-serial data converter for conversion of time code in parallel form into serial form. The resulting longitudinal time code is suitable for recording on magnetic tape in synchronism with ... | 07/30/1985 |
| 4488179 | Television viewing center system At least two television reception tuners are used in a viewing center system, one for the television signals and the other for supplementary information transmitted during the blanking intervals and separated in the reception center by a data separation s... | 12/11/1984 |
| 4451848 | Television receiver including a circuit for doubling line scanning frequency A television receiver according to the present invention includes a circuit for doubling line scanning frequency, receives character information signals of frame rate, and in which scanning lines of even fields coincide with those of odd fields. The telev... | 05/29/1984 |
| 4439761 | Terminal generation of dynamically redefinable character sets A graphic display terminal is arranged to receive from a sending source drawing instructions containing the description of a display character. The terminal, under control independent from the sending source, interprets each received drawing instruction i... | 03/27/1984 |
| 4417283 | Digital signal processing system A digital signal processing system in which the actual signal data obtained through digitalization of the information signal and control data of the digital control signals are used for the control of the actual signal data and are transmitted together wi... | 11/22/1983 |
| 4413281 | Method for simultaneous teletext and analog signal transmission Disclosed is a process for the transmission of information over television networks wherein certain information is encoded in digital form and transmitted by supplementing and/or replacing the information forming the conventional program. The digital info... | 11/01/1983 |
| 4409626 | Video disc player having vertical timing signal generator A signal source continuously produces a horizontal timing signal proportional to the line rate of a recovered composite video signal. A vertical timing unit coupled to the source continuously produces a vertical timing signal proportional to the field rat... | 10/11/1983 |
| 4365329 | Process and device for phasing a local clock The most favorable clock signal among n available signals which present equal successive phase shifts is selected by comparison with a synchronization burst. For this, a logic phase comparison is effected between the signals obtained by division by 2 of e... | 12/21/1982 |
| 4358787 | Digital process for controlling the correct reproduction of a composite television signal and a device for implementing said process A digital process for controlling the correct reproduction of a composite television signal and in particular of a composite color television signal comprising sequential-type chrominance signals, transmitted or recorded on an information-carrying medium ... | 11/09/1982 |
| 4353091 | Circuit for detecting faults in horizontal sync pulse signals To obtain a switching signal whenever a fault occurs in the synchronization signals of a video signal, a fault detection circuit has a counter which receives the signals to be tested at its clock input and reference signals at its control input. The refer... | 10/05/1982 |
| 4323921 | System for transmitting information provided with means for controlling access to the information transmitted A system for transmitting information between an emitting center and receiving stations, comprising: a subscription administration center generating a plurality of subscriber's keys Ci changing randomly at relatively long intervals of the order... | 04/06/1982 |
| 4318125 | Solid state digital audio scrambler system for teletransmission of audio intelligence through a television system An audio scrambler digitally samples a continuous audio signal, scrambles the derived samples and inserts at least one scrambled sample in the unoccupied region of the video signals of a video system for transmission line per line as an analog composite a... | 03/02/1982 |
| 4295223 | Digital signal/noise ratio amplifier apparatus for a communication system The signal-to-noise ratio of a signal to be transmitted through a communication channel having an upper and lower limit in magnitude is sampled digitally and a common corrective factor for the deviations about the mean value of the signal is determined fo... | 10/13/1981 |
| 4286281 | Video format signal recording and reproducing device A video format signal recording and reproducing device in which an identification signal is inserted into each frame of the video format signal for identifying whether the corresponding data is video or audio data. The identification signal may further be... | 08/25/1981 |
| 4281345 | Synchronization of digital memory with TV signal having interlace The aim of the present invention is to make it possible to synchronize a digital memory with an existing TV-system, in which a TV-picture is transmitted with video interlace. According to the invention a corrected field synchronizing pulse is formed by me... | 07/28/1981 |
| 4253115 | Process for the transmission of an audiofrequency analog signal during line-frame synchronization intervals of a television signal and apparatus for performing this process The transmission process comprises a coding of the sound signal consisting of converting it into words of n bits at a frequency double the line frequency and during each synchronization pulse transmitting four words of n bits corresponding to different sa... | 02/24/1981 |
| 4233627 | Signal multiplexing system A system for multiplexing an FM composite television video signal and a PCM (pulse code modulation) time division multiplexed audio signal. The PCM multiplexed audio signal has a frame repetition frequency or sampling frequency fs which is rela... | 11/11/1980 |
| 4199656 | Digital video signal processor with distortion correction An apparatus for compensating for signal distortions in an input digital signal, such as a pseudo video scan line having a television video scan line format and capable of comprising a complete self-contained packet of digital information sufficient to pr... | 04/22/1980 |
| 4195204 | Signal mixer circuit A multi-data recording system includes apparatus for generating two control signals of different frequency characteristics. A mixer is provided for interleaving the two types of signals. The display and recording of the data signals is accomplished under ... | 03/25/1980 |
| 4170026 | Circuitry for line recognition of a television signal Circuitry for line recognition of a television signal comprises a serration detector which receives the sync pulse and separates the portion of the serration of the vertical sync pulse; a first counter which is coupled to the serration detector and produc... | 10/02/1979 |
| 4122477 | Method and apparatus for inserting synchronizing words in a digitalized television signal data stream A method and apparatus is disclosed for providing a unique digital synchronization word in a generally continually moving digital data stream wherein the data stream represents at least one digital component of a composite video signal having horizontal a... | 10/24/1978 |
| 4112252 | Multi-terminal serially communicating shared logic text editing system A text editing system is provided in which a central station communicates a video signal, timing signals, and control signal to a remote station by way of a single communication pathway for subsequent display on a cathode ray tube at the remote station an... | 09/05/1978 |
| 4051532 | Auxiliary signal processing circuit for television receivers A low level video auxiliary signal is transmitted in addition to the conventional composite black and white or color television signal. The auxiliary signal is in the form of redundant, opposite-polarity signal portions during pairs of time successive sig... | 09/27/1977 |
| 4016361 | Apparatus for storing data broadcast in digital form for generating a character display or for recording such data for later playback Apparatus for use in conjunction with a television broadcast receiver for storing, in a main memory, digital data transmitted during portions of the transmitted video signals not used for picture signal content. The digital data is extracted at the receiv... | 04/05/1977 |
| 3982064 | Combined television/data transmission system A television transmission system of the kind in which some of the line scan periods of a conventional transmission that are left blank (as far as picture content is concerned) between successive frame transmissions are utilized for signalling data for sel... | 09/21/1976 |
