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Class Information
Number: 370/477
Name: Multiplex communications > Communication techniques for information carried in plural channels > Transmission bandwidth conservation
Description: Subject matter having means for accommodating more information per unit time on a given transmission medium.










Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

Patent Number Title Of Patent Date Issued
4648089 Digital voice summing for teleconferencing Mar. 3, 1987
4622680 Hybrid subband coder/decoder method and apparatus Nov. 11, 1986
4607362 Method of and circuit arrangement for establishing conference connections in a switching system Aug. 19, 1986
4606021 Digital conference circuit Aug. 12, 1986
4603417 PCM coder and decoder Jul. 29, 1986
4598411 On-the-fly data compression system Jul. 1, 1986
4589110 Signal processor (system) for reducing bandwidth and for multiplexing a plurality of signals onto a single communications link May. 13, 1986
4586174 Audio channel stacking with speech compression for narrow band transmission with provision for dialed calls Apr. 29, 1986
4581737 Bit compression multiplexing Apr. 8, 1986
4577312 Arrangement for wideband transmission via a switched network Mar. 18, 1986
4550399 Odynamical operating rate allocation process in a multiplex communication system Oct. 29, 1985
4541008 Television signal bandwidth reduction using variable rate transmission Sep. 10, 1985
4519073 Bit compression multiplexer May. 21, 1985
4498167 TDM Communication system Feb. 5, 1985
RE31814 Three-party conference circuit for digital time-division-multiplex communication systems Jan. 22, 1985
4495620 Transmitting data on the phase of speech Jan. 22, 1985
4494232 Statistical multiplexer with dynamic bandwidth allocation for asynchronous and synchronous channels Jan. 15, 1985
4479213 Transmission method for transmitting voice and data information over telephone line and device for implementing said method Oct. 23, 1984
4455649 Method and apparatus for efficient statistical multiplexing of voice and data signals Jun. 19, 1984
4430745 Digital data transmission Feb. 7, 1984
4425642 Simultaneous transmission of two information signals within a band-limited communications channel Jan. 10, 1984
4387457 Digital conference circuit and method Jun. 7, 1983
4358845 Process for the compression of signalling data or the like transmitted in a train of multiplexed PCM information Nov. 9, 1982
4330858 Time domain supervisory channel for data terminal equipments May. 18, 1982
4320520 Transmitter/receiver for use on common cable communications system such as ethernet Mar. 16, 1982
4313194 Transmission system of frequency division multiplex signals on digital links Jan. 26, 1982
4312064 Modified vestigial side band transmission system Jan. 19, 1982
4311877 Method and means for improving the reliability of systems that transmit relatively wideband signals over two or more relatively narrowband transmission circuits Jan. 19, 1982
4301531 Three-party conference circuit for digital time-division-multiplex communication systems Nov. 17, 1981
4270026 Interpolator apparatus for increasing the word rate of a digital signal of the type employed in digital telephone systems May. 26, 1981
4268914 Receiving apparatus for messages with in-band signals May. 19, 1981
4255620 Method and apparatus for bandwidth reduction Mar. 10, 1981
4237552 Time division multiplexed transmission systems for telephone or like signals with frequency band compression Dec. 2, 1980
4227250 Minimization of excess bandwidth in pulse amplitude modulated data transmission Oct. 7, 1980
4205200 Digital communications system utilizing controllable field size May. 27, 1980
4205201 Method and means for reducing intelligible crosstalk in telephone systems May. 27, 1980
4160877 Multiplexing of bytes of non-uniform length with end of time slot indicator Jul. 10, 1979
4149039 Frequency band compression of FDM using time expansion Apr. 10, 1979
4131765 Method and means for improving the spectrum utilization of communications channels Dec. 26, 1978
4110563 Traffic sensitive modulation system Aug. 29, 1978
4092665 Method and means for extracting variable length data from fixed length bytes May. 30, 1978
4087642 Digital data communication system May. 2, 1978
4079202 Digital communication system Mar. 14, 1978
4074074 Time division digital transmission system Feb. 14, 1978
4071707 Process and apparatus for improving the utilization of transmisson channels through thinning out sections of the signal band Jan. 31, 1978
4066844 Adaptable zero order predictor for speech predictive encoding communications systems Jan. 3, 1978
4047108 Digital transmission system for transmitting speech signals at a low bit rate, and transmission for use in such a system Sep. 6, 1977
4005274 Pulse-code modulation communication system Jan. 25, 1977
3987374 Multi-line, multi-mode modulator using bandwidth reduction for digital FSK and DPSK modulation Oct. 19, 1976
3984643 Method and apparatus for establishing a plurality of simultaneous conferences in a PCM switching system Oct. 5, 1976

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