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| Number | Title | Issue Date |
| 4455635 | Coding system for recorded digital audio A system for recording and recovering analog signal in digital format utilizes a substantially video field format without the vertical blanking intervals thereby eliminating the need to time compress the information on a field by field basis. The digital ... | 06/19/1984 |
| 4395768 | Error correction device for data transfer system An error correction device for digital data storage and transfer systems wherein data are transferred over a plurality of channels. Synchronously with the transfer of a group of data bits, a coding device forms a first correction bit for a first correctio... | 07/26/1983 |
| 4393502 | Method and apparatus for communicating digital information words by error-correction encoding A method and appratus are provided for communicating a sequence of digital information words. The information words are separated into a sequence of odd information words and a sequence of even information words. The separated odd and even information wor... | 07/12/1983 |
| 4355392 | Burst-error correcting system In a digital signal transmission system, a predetermined number of words of digital information signals are added bit by bit in a modulo 2 adder to produce a first parity signal. The information signals and the first parity signal are delayed so as to hav... | 10/19/1982 |
| 4354269 | Apparatus for the processing of an information stream with the aid of an error-correcting convolutional code and apparatus for the detection of an error still irremediable in this processing A sequence of k-tuples of information elements is converted by means of an error-correcting convolutional code into a sequence of n-tuples (n greater than k) of code elements. In the processing of the code elements use is made of first of all a syndrome f... | 10/12/1982 |
| 4312070 | Digital encoder-decoder A digital encoding and decoding system suited for use in a mobile trunked dispatch communication system capable of error correction, error detection, and detection of loss of synchronization. The encoder comprises a cyclic block encoder, an autosynchroniz... | 01/19/1982 |
| 4295218 | Error-correcting coding system A method and apparatus for constructing long error-correcting codes from one or more shorter error-correcting codes, referred to as subcodes, and a bipartite graph. The graph specifies carefully chosen subsets of the digits of the new codes that must be c... | 10/13/1981 |
| 4291406 | Error correction on burst channels by sequential decoding A sequential decoder for error correction on burst and random noise channels using convolutionally encoded data. The decoder interacts with a deinterleaver which time demultiplexes data from a data channel from its time multiplexed form into a predetermin... | 09/22/1981 |
| 4074228 | Error correction of digital signals Data bits are combined at a transmitter with parity check code bits and convolutional check code bits. On reception the parity check code bits are decoded to determine the error probability in the received signal. The convolutional check code bits are use... | 02/14/1978 |
| 4032886 | Concatenation technique for burst-error correction and synchronization A system for processing a digital information bit stream and generating a data bit stream. The processing includes convolutional burst error correction encoding which is capable of correcting burst errors of length 2B, where B is any positive integer. Inh... | 06/28/1977 |
| 3988677 | Space communication system for compressed data with a concatenated Reed-Solomon-Viterbi coding channel A space communication system incorporating a concatenated Reed Solomon Viterbi coding channel is disclosed for transmitting compressed and uncompressed data from a spacecraft to a data processing center on Earth. Imaging (and other) data is first compress... | 10/26/1976 |
