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Class Information
Number: 375/242
Name: Pulse or digital communications > Pulse code modulation
Description: Subject matter in which a signal to be transmitted is sampled or compared and then converted into a digital pulse train which represents the amplitude of the sampled signal at the instant of sampling or comparison, and this digital pulse train is transmitted so it may be reconverted into a duplicate of the original signal at a receiver.

Sub-classes under this class:

Class Number Class Name Patents
375/243 Correcting or reducing quantizing errors 226
375/244 Differential 254
375/253 Length coding 170
375/254 Noise or distortion reduction 404

Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12

Patent Number Title Of Patent Date Issued
7269222 Miniaturized pulse code modulation encoder Sep. 11, 2007
7260158 Digital broadcast receiver and digital broadcast receiving method Aug. 21, 2007
7260151 Dual phase pulse modulation system Aug. 21, 2007
7257163 Method and system for reducing inter-symbol interference effects in transmission over a serial link with mapping of each word in a cluster of received words to a single transmitted word Aug. 14, 2007
7251280 Circuit structure and signal encoding method for a serial ATA external physical layer Jul. 31, 2007
7245237 Digital sampling rate conversion using a poly-phase filter and a polynomial interpolator Jul. 17, 2007
7242718 Coding standard selecting method and terminal device Jul. 10, 2007
7239664 Method for selecting the data rate for PCM upstream transmission Jul. 3, 2007
7236112 Self-tuning output digital filter for direct conversion delta-sigma transmitter Jun. 26, 2007
7224737 Method and apparatus employing PAM-5 coding with clock embedded in data stream and having a transition when data bits remain unchanged May. 29, 2007
7203248 Impairment sensitive selection of constellation points for communication across a channel Apr. 10, 2007
7203241 Methods and apparatus for adaptive PCM level estimation and constellation training Apr. 10, 2007
7191301 ROM addressing method for an ADPCM decoder implementation Mar. 13, 2007
7187715 Systems and methods for providing adaptive pulse position modulated code division multiple access for ultra-wideband communication links Mar. 6, 2007
7184480 Digital PWM generator Feb. 27, 2007
7170930 Receiver Jan. 30, 2007
7167523 Spacial derivative bus encoder and decoder Jan. 23, 2007
7158572 Audio enhancement communication techniques Jan. 2, 2007
7145954 Method and apparatus for mapping pulses to a non-fixed layout Dec. 5, 2006
7136418 Scalable and perceptually ranked signal coding and decoding Nov. 14, 2006
7136419 Pulse width communications using precision timing Nov. 14, 2006
7130587 Communication quality estimation method, communication quality estimation apparatus, and communication system Oct. 31, 2006
7106779 Method and apparatus for providing configurable layers and protocols in a communications system Sep. 12, 2006
7088778 Method and apparatus for measurement of channel transmission accuracy Aug. 8, 2006
7085329 High speed decoding apparatus and method for analog subscriber connections Aug. 1, 2006
7069489 Transmission apparatus, reception apparatus, transmission method, and reception method Jun. 27, 2006
7065142 ADSL encoder and decoder Jun. 20, 2006
7058136 Method and apparatus for generating an RF signal Jun. 6, 2006
7054380 Embedding a first digital information signal into a second digital information signal for transmission via a transmission medium May. 30, 2006
7046975 Method and system for blind detection of modulation type May. 16, 2006
7046809 Device and method for scrambling/descrambling voice and data for mobile communication system May. 16, 2006
7031394 Communication systems conveying voice and data signals over standard telephone lines Apr. 18, 2006
7023927 Constellation design for PCM upstream modulation Apr. 4, 2006
7020208 Differential clock signals encoded with data Mar. 28, 2006
7020189 Method and apparatus for implementing digital filters in the data path of a PCM modem for efficient transition of a second analog-to-digital conversion process Mar. 28, 2006
7012965 High speed leading or trailing bit value detection Mar. 14, 2006
7003041 Device and method for decoding turbo codes Feb. 21, 2006
7003054 Receiving method and receiver Feb. 21, 2006
6993067 Fractional bit rate encoding in a pulse amplitude modulation communication system Jan. 31, 2006
6982662 Method and apparatus for efficient conversion of signals using look-up table Jan. 3, 2006
6980605 MAP decoding with parallelized sliding window processing Dec. 27, 2005
6980607 Method for decoding a data signal Dec. 27, 2005
6970113 Method for generation of even numbered reduced gray codes Nov. 29, 2005
6963290 Data recovery for pulse telemetry using pulse position modulation Nov. 8, 2005
6959030 Method and apparatus for generating an interleaved code Oct. 25, 2005
6944215 Method and apparatus for transmitting data from an analogue modem to a digital modem through an analogue channel Sep. 13, 2005
6928065 Methods of addressing and signaling a plurality of subscriber units in a single slot Aug. 9, 2005
6898272 System and method for testing telecommunication devices May. 24, 2005
6888885 Modem data constellation design including power compensation for analog loss and utilization of maximum dynamic range of CODEC May. 3, 2005
6889095 Computer network adapted for industrial environments May. 3, 2005

1 2 3 4 5 6 7 8 9 10 11 12

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