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Class Information
Number: 375/249
Name: Pulse or digital communications > Pulse code modulation > Differential > Single bit (delta) > Compand (overload prevention)
Description: Subject matter in which the size of the incremental amount is variable over a wide dynamic range in response to predetermined patterns in the transmitted series of digital bits or "delta bits" (delta modulation pulse train).

Sub-classes under this class:

Class Number Class Name Patents
375/250 Redundancy removal 41
375/251 Syllabic 18

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
4233684 Arrangement for decoding a signal encoded by means of adaptive delta modulation Nov. 11, 1980
4208740 Adaptive delta modulation system Jun. 17, 1980
4190801 Digital encoding circuitry Feb. 26, 1980
4140876 Compressed speech system and predictor Feb. 20, 1979
4123709 Adaptive digital delta modulation for voice transmission Oct. 31, 1978
4110705 Noise reduction method and apparatus for companded delta modulators Aug. 29, 1978
4109203 Delta-modulation encoder Aug. 22, 1978
4100493 Transmission system for signal transmission by means of compressed delta modulation Jul. 11, 1978
4100494 Dynamic control of code modulated pulse transmission Jul. 11, 1978
4099122 Transmission system by means of time quantization and trivalent amplitude quantization Jul. 4, 1978
4090136 Method and apparatus for coding a signal May. 16, 1978
4075701 Method and circuit arrangement for adapting the measuring range of a measuring device operating with delta modulation in a navigation system Feb. 21, 1978
4071825 Adaptive delta modulation system Jan. 31, 1978
4059800 Digital multi-line companded delta modulator Nov. 22, 1977
4042921 Digital encoder/decoder Aug. 16, 1977
4039949 Pulse code modulation with dynamic range limiting Aug. 2, 1977
4039948 Multi-channel differential pulse code modulation system Aug. 2, 1977
4039950 Pulse code transmitter and receiver designed to produce uniform transfer characteristics in the face of component variations Aug. 2, 1977
4037226 Pulse code modulation compressor Jul. 19, 1977
4021799 Non-linear coding system May. 3, 1977
3995217 Method and apparatus for suppressing background noise in a digital telephone system Nov. 30, 1976
3995218 Adaptive delta modulation system for correcting mistracking Nov. 30, 1976
3975588 Acoustic feedback control Aug. 17, 1976
3975686 Loss signal generation for delta-modulated signals Aug. 17, 1976
3973081 Feedback residue compression for digital speech systems Aug. 3, 1976
3973199 Prediction differential pulse code modulation system with adaptive compounding Aug. 3, 1976

1 2 3

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