Transmission system

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4569058
SERIAL NO

06596659

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

A transmission system wherein PCM code words are converted into DPCM code words at the transmit side and are reconverted into PCM code words at the receive side. A DPCM coder comprising a respective quantizer for variable-length code words, a quantizer for code words having a fixed, below-average length, and a DPCM decoder comprising a code converter for variable-length code words and a code converter for code words having a fixed, below-average length are provided for this purpose. The type of conversion for the next PCM code word present at the input is selected after each conversion on the basis of the number of memory locations that still exist. This transmission system is suitable for data reduction, particularly of digital video signals.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddressTotal Patents
SIEMENS AKTIENGESELLSCHAFTMUNICH7188

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Grallert, Hans-Joachim Groebenzell, DE 10 140

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Nippon Electric Co., Ltd. (1)
* 4517596 System comprising a preliminary processing device controlled in accordance with an amount of information stored in a buffer 41 1982
 
WESTERN ELECTRIC COMPANY, INCORPORATED (1)
* 4491953 Dual mode coding 16 1982
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
GENERAL ELECTRIC COMPANY (3)
* 4914675 Apparatus for efficiently packing data in a buffer 29 1988
* 4821290 Decoder for digital signal codes 21 1988
* 5060242 Non-destructive lossless image coder 84 1989
 
NEC CORPORATION (1)
* 4706265 Code converting system and method for band compression of digital signals 80 1985
 
SONY CORPORATION (14)
* 5583967 Apparatus for compressing a digital input signal with signal spectrum-dependent and noise spectrum-dependent quantizing bit allocation 31 1993
* 5642111 High efficiency encoding or decoding method and device 17 1994
* 5521713 Apparatus and method for data compression and expansion using hybrid equal length coding and unequal length coding 5 1994
* 5438643 Compressed data recording and/or reproducing apparatus and signal processing method 68 1994
* RE36559 Method and apparatus for encoding audio signals divided into a plurality of frequency bands 1 1994
* 5581654 Method and apparatus for information encoding and decoding 20 1994
* 5608713 Bit allocation of digital audio signal blocks by non-linear processing 16 1995
* 5617219 Apparatus and method for data compression and expansion using hybrid equal length coding and unequal length coding 13 1995
* 5758316 Methods and apparatus for information encoding and decoding based upon tonal components of plural channels 10 1995
6647063 Information encoding method and apparatus, information decoding method and apparatus and recording medium 32 1995
* 5781586 Method and apparatus for encoding the information, method and apparatus for decoding the information and information recording medium 11 1995
* 5832426 High efficiency audio encoding method and apparatus 5 1995
* 5819214 Length of a processing block is rendered variable responsive to input signals 28 1997
* 5752224 Information encoding method and apparatus, information decoding method and apparatus information transmission method and information recording medium 24 1997
 
SIEMENS AKTIENGESELLSCHAFT (1)
* 4651194 Arrangement for multiplexing luminance and chrominance code words of variable length 5 1984
 
VTECH INDUSTRIES, INC. (1)
* 5696791 Apparatus and method for decoding a sequence of digitally encoded data 46 1995
 
FUJI PHOTO FILM CO., LTD. (1)
* 4656500 Adaptive type compression method for compressing a color image by imparting predetermined variable-length codes to combinations of quantized values based upon quantized prediction error components 40 1984
 
The United States of America as represented by the Secretary of the Navy (1)
* 5136290 Message expansion decoder and decoding method for a communication channel 10 1990
 
COMPUPIX TECHNOLOGY, INC., 5301 NORTH FEDERAL HWY., SCCA RATON, FL 33431 A CORP. OF FL (1)
* 4665436 Narrow bandwidth signal transmission 38 1985
 
RCA Corporation (1)
* 4691233 Rate buffer control of difference signal decimation and interpolation for adaptive differential pulse code modulator 30 1986
 
FUJITSU LIMITED (1)
* 4788692 Adaptive differential pulse code modulation system 11 1986
 
THOMSON CONSUMER ELECTRONICS, INC. (1)
* 5343195 Variable length codeword decoding apparatus 15 1992
 
CANON KABUSHIKI KAISHA (1)
* 5166958 Coding apparatus with low-frequency and DC suppression 5 1990
* Cited By Examiner