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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:
| Patent Number |
Title Of Patent |
Date Issued |
| 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 |
| 7474703 |
Digital television system |
Jan. 6, 2009 |
| 7474702 |
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 |
| 7158572 |
Audio enhancement communication techniques |
Jan. 2, 2007 |
| 7020303 |
Feature-based watermarks and watermark detection strategies |
Mar. 28, 2006 |
| 6993067 |
Fractional bit rate encoding in a pulse amplitude modulation communication system |
Jan. 31, 2006 |
| 6839381 |
Method and apparatus for coherent detection in a telecommunications system |
Jan. 4, 2005 |
| 6788482 |
Method and apparatus for Viterbi detector state metric re-normalization |
Sep. 7, 2004 |
| 6785339 |
Method and apparatus for providing speech quality based packet enhancement in packet switched networks |
Aug. 31, 2004 |
| 6745162 |
System and method for bit allocation in an audio encoder |
Jun. 1, 2004 |
| 6654384 |
Integrated self-optimizing multi-parameter and multi-variable point to multipoint communication system |
Nov. 25, 2003 |
| 6651036 |
RMS-to-DC converter with fault detection and recovery |
Nov. 18, 2003 |
| 6636575 |
Cascading PLL units for achieving rapid synchronization between digital communications systems |
Oct. 21, 2003 |
| 6549569 |
System and method for improving conversion between A-law and U-law coding |
Apr. 15, 2003 |
| 6539122 |
Adaptive wavelet coding of hyperspectral imagery |
Mar. 25, 2003 |
| 6539061 |
Efficient method for decompressing difference coded signals |
Mar. 25, 2003 |
| 6532268 |
Receiving apparatus and transmitting/receiving system |
Mar. 11, 2003 |
| 6529569 |
Architecture for increasing density of channel bank in digital carrier system |
Mar. 4, 2003 |
| 6510180 |
Embedded software negotiation of PCM companding format |
Jan. 21, 2003 |
| 6507619 |
Decoding system and method for digital communications |
Jan. 14, 2003 |
| 6424822 |
Communication device and method of operation |
Jul. 23, 2002 |
| 6400769 |
Central office linecard and method for mapping companded data formats |
Jun. 4, 2002 |
| 6304612 |
Transmission system having a simplified channel decoder |
Oct. 16, 2001 |
| 6289020 |
ATM data controller |
Sep. 11, 2001 |
| 6288657 |
Encoding apparatus and method, decoding apparatus and method, and distribution media |
Sep. 11, 2001 |
| 6226302 |
Multiplex transmission system wherein analog signal is transformed to base band, random-transformed and superimposed on dispersed signal points in vector signal space |
May. 1, 2001 |
| 6172987 |
Switching compression routines with no loss of data |
Jan. 9, 2001 |
| 6172965 |
Duplex transmission scheme |
Jan. 9, 2001 |
| 6167093 |
Method and apparatus for encoding the information, method and apparatus for decoding the information and method for information transmission |
Dec. 26, 2000 |
| 6097760 |
Data communications system |
Aug. 1, 2000 |
| 6052158 |
Using equalized data for filter selection in HDTV receiver |
Apr. 18, 2000 |
| 6034994 |
Method for controlling the point of time when bypass mode operation is begun, based on the format of PCM data |
Mar. 7, 2000 |
| 6023294 |
Bit budget estimation method and device for variable word length encoders |
Feb. 8, 2000 |
| 6018548 |
System and method for compressing data in a communication channel utilizing time encoding |
Jan. 25, 2000 |
| 6018520 |
Base station apparatus and a mobile radio terminal for a radio communication system, and radio communication system, and a communicating method in a radio communication system |
Jan. 25, 2000 |
| 5991340 |
Method and system for encoding and decoding data using run prediction |
Nov. 23, 1999 |
| 5946352 |
Method and apparatus for downmixing decoded data streams in the frequency domain prior to conversion to the time domain |
Aug. 31, 1999 |
| 5890126 |
Audio data decompression and interpolation apparatus and method |
Mar. 30, 1999 |
| 5883925 |
Pulse code modulation compression mechanism |
Mar. 16, 1999 |
| 5878080 |
N-channel transmission, compatible with 2-channel transmission and 1-channel transmission |
Mar. 2, 1999 |
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