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Class Information
Number: 375/241
Name: Pulse or digital communications > Bandwidth reduction or expansion > Pulse code modulation
Description: Subject matter wherein the pulse or digital 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.

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8705634 Compression of baseband signals in base transceiver systems Apr. 22, 2014
8655301 Frequency agile duplex filter Feb. 18, 2014
8630356 High performance loop filters in video compression Jan. 14, 2014
8619882 Data modulation circuit Dec. 31, 2013
8619868 Backward-compatible characterization of aggregated media data units Dec. 31, 2013
8612837 BM/LLR computations for multi-dimensional TCM/BCM codes Dec. 17, 2013
8594205 Multiple description coding communication system Nov. 26, 2013
8589166 Speech content based packet loss concealment Nov. 19, 2013
8374147 System and method for protecting payload information in radio transmission Feb. 12, 2013
8351889 Frequency agile duplex filter Jan. 8, 2013
8331461 Compression of baseband signals in base transceiver system radio units Dec. 11, 2012
8327244 BM/LLR computations for multi-dimensional TCM/BCM codes Dec. 4, 2012
8265173 Method for compression and expansion of analogue signals Sep. 11, 2012
8161511 Digital broadcasting system and method of processing data in digital broadcasting system Apr. 17, 2012
8155168 Inductive communication system with increased noise immunity using low-complexity transmitter Apr. 10, 2012
8138957 Direct digital frequency synthesizer using hybrid digital to analog converter and synthesizing method thereof Mar. 20, 2012
8135585 Method and an apparatus for processing a signal Mar. 13, 2012
8130846 System and method for single-carrier space-frequency block coded transmission over frequency selective and fast fading channels Mar. 6, 2012
8116385 Method for the transmission of a data word Feb. 14, 2012
8107429 System and method for protecting payload information in radio transmission Jan. 31, 2012
8102922 Demodulator device and demodulation method for reducing PCR jitter Jan. 24, 2012
8091114 Integrated security event management system Jan. 3, 2012
8065140 Method and system for determining predominant fundamental frequency Nov. 22, 2011
8042027 BM/LLR computation for multi-dimensional TCM/BCM Oct. 18, 2011
8023581 Max-log receiver for multiple-input multiple-output (MIMO) systems Sep. 20, 2011
8005152 Compression of baseband signals in base transceiver systems Aug. 23, 2011
8000402 System and method for accelerated performance of quadrature amplitude modulation (QAM) decoding operations in a processor Aug. 16, 2011
7970354 Frequency agile duplex filter Jun. 28, 2011
7957464 Digital signal receiver Jun. 7, 2011
7917370 Configurable common filterbank processor applicable for various audio standards and processing method thereof Mar. 29, 2011
7856067 Unequal hierarchical communications modulation method Dec. 21, 2010
7796700 Method and system for computing log-likelihood ratios for coded quadrature amplitude modulated signals Sep. 14, 2010
7738553 Video compression system Jun. 15, 2010
7719825 Faceplate including wireless LAN communications May. 18, 2010
7720137 Characterization of a frequency response for a frequency translation device May. 18, 2010
7660372 Efficient header acquisition Feb. 9, 2010
7653127 Bit-edge zero forcing equalizer Jan. 26, 2010
7599348 Digital E8-VSB reception system and E8-VSB data demultiplexing method Oct. 6, 2009
7522668 Radio communication system and radio transmitter Apr. 21, 2009
7474702 Digital television system Jan. 6, 2009
7474703 Digital television system Jan. 6, 2009
7453855 Multiuser detection and interference suppression techniques for direct sequence spread spectrum systems in which all users employ same spreading code Nov. 18, 2008
7391813 Digital wireless communications device Jun. 24, 2008
7362811 Audio enhancement communication techniques Apr. 22, 2008
7336713 Method and apparatus for encoding and decoding data Feb. 26, 2008
7330466 PCM-based data transmission system and method Feb. 12, 2008
7277490 Apparatus for converting PCM signal Oct. 2, 2007
7272567 Scalable lossless audio codec and authoring tool Sep. 18, 2007
7215931 Method and apparatus for up-and-down-conversion of radio frequency (RF) signals May. 8, 2007
7215831 Video enhancement using multiple frame techniques May. 8, 2007

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