Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 5644569 | Transmission of messages A coding scheme for transmitting messages particularly between computers is described. Messages are transmitted in packets which include at least a data portion and a terminator. Out of a predetermined set of symbols, sixteen data symbols and at least one... | 07/01/1997 |
| 5640160 | Pulse modulation method A binary code is divided into 2-bit data units. Pulse position modulation is performed on each unit rather than on each bit. Since a pulse is not formed for each bit, the transmission interval and transmission frame interval for the modulated signal is sh... | 06/17/1997 |
| 5596603 | Device for wireless transmission of digital data, in particular of audio data, by infrared light in headphones Infrared light is used in a device for wireless transmission of digital data, e.g. in headphones. In order to satisfy the strict requirements regarding compactness and power consumption, it is proposed that three digital stereo sampling values are encoded... | 01/21/1997 |
| 5566192 | Variable-length decoder for bit-stuffed data A variable-length decoder variable-length-decodes a received variable-length-encoded data. The variable-length-encoded data is bit-stuffed in each data block to create data portions with a predetermined number of bits. Frame start codes representing a sta... | 10/15/1996 |
| 5528628 | Apparatus for variable-length coding and variable-length-decoding using a plurality of Huffman coding tables An apparatus for variable-length-coding input symbols using a plurality of variable-length-code tables includes N variable-length-code tables each having a symbol-codeword association different from the others according to statistics regarding the symbols... | 06/18/1996 |
| 5243342 | Integrated PCM level control and conversion using a lookup table A method and apparatus for converting a signal by reading a first signal that is represented in a first format. The first signal is used as an index into a lookup table, the first table containing entries representing signals in a second format modified b... | 09/07/1993 |
| 5235618 | Video signal coding apparatus, coding method used in the video signal coding apparatus and video signal coding transmission system having the video signal coding apparatus A signal coding apparatus, which is coupled, via a transmission path, to a receiver having a receiver buffer and a decoder, includes a coding unit for coding a signal and outputting information generated in a frame unit, the information being a coded sign... | 08/10/1993 |
| 5212481 | Circuit for code converting PCM codes A circuit for converting a 8-bit μLawPCM code into a 14-bit linear code comprising an inversion circuit receiving a 8-bit μLawPCM code for outputting a 8-bit inverted signal. A 6-bit signal is obtained by putting a bit of "1" at a place lower than the l... | 05/18/1993 |
| 5168356 | Apparatus for segmenting encoded video signal for transmission A vide signal encoding system includes apparatus for segmenting encoded video data into transport blocks for signal transmission. The transport block format enhances signal recovery at the receiver by virtue of providing header data from which a receiver ... | 12/01/1992 |
| 5148272 | Apparatus for recombining prioritized video data Apparatus for decoding an HDTV signal conveyed as high and low priority data in high and low priority channels respectively, wherein said high and low priority data originated from blocks of hierarchically encoded compressed video data, with data of great... | 09/15/1992 |
| 5148271 | Method for transmission of variable length code and apparatus for coding a video signal A method for transmission of variable length code words is provided in which the variable length code words are allocated into a data storage field not only from the front end of the same but also from the rear end, whereby unwanted affection by transmiss... | 09/15/1992 |
| 5132989 | Method of transmitting a sequence of M binary words of "p" bits and transmission arrangement implementing this method Binary words of the same length are grouped in codewords having a capacity for data bits which is not an integral multiple of the number of bits in a data word. Each of the codewords has the same length, and includes a plurality of data words in their ent... | 07/21/1992 |
| 5122875 | An HDTV compression system Apparatus for encoding/decoding a HDTV signal for e.g., terrestrial transmission includes a compression circuit responsive to high definition video source signals for providing ierarchically layered codewords CW representing compressed video data and asso... | 06/16/1992 |
| 5111292 | Priority selection apparatus as for a video signal processor Apparatus for encoding/decoding a HDTV signal for e.g. terrestrial transmission includes a priority selection processor for parsing compressed video codewords between high and low priority channels for transmission. A compression circuit responsive to hig... | 05/05/1992 |
| 5077721 | Data recording and/or reproducing method and data recording medium The present invention is concerned with a method for modulating and recording data, in which the data are modulated in such a manner that m-bit data are converted into n-bit data, where m and n are real integers and m | 12/31/1991 |
| 5062152 | PCM signal coding A signal having a non-uniform probability density is processed for transmission in pulse code modulated form. The signal is quantized using conventional methods and the quantized signal is then coded using a non-sequential coding scheme in which binary co... | 10/29/1991 |
| 4930140 | Code division multiplex system using selectable length spreading code sequences A code division multiplex system for use in a spread spectrum communication system utilizes selectable length spread spectrum spreading code sequences. At the encoder, one of a pluraluty of a spread spectrum spreading code sequences having a given fixed l... | 05/29/1990 |
| 4914675 | Apparatus for efficiently packing data in a buffer Variable-length codewords are grouped into successive N bit word groups in sequential order as received from a variable length codeword encoder. The N-bit groups are each stored in corresponding N-bit-wide memory locations in a buffer memory prior to tran... | 04/03/1990 |
| 4876698 | System for transmitting sequences of digital samples encoded by variable-length binary words A system for transmitting sequences of digital samples encoded by variable-length binary words is formed on the one hand by a transmitter device comprising a statistic encoding circuit for encoding in said variable-length words words of a fixed length app... | 10/24/1989 |
| 4860324 | Information data recovering apparatus An information data recovering apparatus which recovers the original information data from transmitted data of (2, 7, 1, 2, 3) Run Length Limited code to which the original data is converted. When 7 successive "0"-bits of a train of transmitted data are i... | 08/22/1989 |
| 4839724 | Process for the digital transmission of information A process for the digital transmission of video signals, wherein the signals to be transmitted are coded according to a variable codeword length code, and this code is adapted at time intervals, preferably at regular time intervals, to a statistic of the ... | 06/13/1989 |
| 4813059 | Readback recovery of run length limited codes Run length limited codes, such as (1,7) codes are recovered with a dual channel recovery system in which the high resolution channel normally supplies the output (recovered) signal. The low resolution channel includes a detector, such as a delay device an... | 03/14/1989 |
| 4757518 | Coding digital data Digital data, such as audio data is coded by encoding apparatus, into a format of fixed-length multi-bit data words. At least one bit in the same predetermined bit position in each data word is a specific information data bit, such as channel status infor... | 07/12/1988 |
| 4706265 | Code converting system and method for band compression of digital signals A code converting system for converting a digital signal having a given number of bits into a digital signal having a different number of bits, which selectively alters the encoding method depending on the nature of the input to the system. The system inc... | 11/10/1987 |
| 4660079 | Receiving device in an asynchronous video information transmitting system This invention relates to digital transmission techniques whereby information produced in asynchronous form, for instance by variable-length coding and/or by conditional coding, is intended for transmission through a synchronous digital transmission path.... | 04/21/1987 |
| 4633312 | Interframe encoding system having a buffer simulator According to the present invention, an encoding system has an interframe encoder for interframe encoding of video signals to supply predictive encoded signals, and a scan converter for converting the predictive encoded signals into predictive encoded sign... | 12/30/1986 |
| 4593267 | Digital data code conversion circuit for variable-word-length data code A digital data code conversion circuit for a variable-word-length data code includes a data code conversion portion and a preparation circuit. In the preparation circuit, a variable-word-length data code having a word length greater than a number n is div... | 06/03/1986 |
| 4574382 | Variable length character code system A coding system applicable to communication is provided so that variable length code representations of a set of characters may be transmitted. The system transmits a data stream made up of a series of variable length code representations of the character... | 03/04/1986 |
| 4562581 | Digital signal transmitting and receiving system for serial data which can be easily decoded A digital signal transmission system whereby the plural-bits-in-one-word digital signals are transmitted serially. According to this system, when the amount of data per unit time increases and the clock frequency of data is extremely high, a word synchron... | 12/31/1985 |
| 4531153 | Method and apparatus for encoding and decoding a binary digital information signal A system of encoding an original binary digital video signal comprised of a plurality of first 8-bit words having an absolute value and a digital sum variation, to produce an encoded binary digital video signal, converts each first 8-bit word into a secon... | 07/23/1985 |
| 4517596 | System comprising a preliminary processing device controlled in accordance with an amount of information stored in a buffer In an encoding system comprising a buffer circuit for successively storing variable length codes and for producing the stored codes at a predetermined rate as transmission codes, a controller produces a control signal which stepwise specifies a variable a... | 05/14/1985 |
| 4394762 | Pulse-code modulation signal processing circuit A PCM signal processing circuit records a predetermined number of PCM signals and also parity signals and a CRC signal after conversion into a signal having a data format conforming to the television signal with a VTR and detects the PCM signals from the ... | 07/19/1983 |
| 4214124 | Method and device for extracting a synchronizing signal from an incoming PCM signal Method and device for extracting a synchronizing signal from a digital signal. The synchronizing signal can be a single bit, a word or a subframe. A first circuit searches for the synchronizing signal in a fixed position in the received signal every time ... | 07/22/1980 |
| 4096526 | Run length encoding and decoding methods and means Black and white run length encoding means first convert a binary video input signal having a raster scan format into binary black and white run length message codes which are preselected so that the initial or lead bit of each of those codes is at a given... | 06/20/1978 |
| 4096520 | Run length encoding and decoding methods and means Black and white run length encoding means first convert a binary video input signal having a raster scan format into binary black and white run length message codes which are preselected so that the initial or lead bit of each of those codes is at a given... | 06/20/1978 |
| 4056828 | Run length encoding and decoding methods and means Black and white run length encoding means first convert a binary video input signal having a raster scan format into binary black and white run length message codes which are preselected so that the initial or lead bit of each of those codes is at a given... | 11/01/1977 |
