US Patent No: 5,229,767

Number of patents in Portfolio can not be more than 2000

Decoder for convolutionally encoded information

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Abstract

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In a Viterbi Algorithm decoder (204) as used to decode convolutionally encoded information, reliability information is developed for various path discard decisions made within the Viterbi Algorithm. These decisions are made for discard opportunities that impact one or more error detection windows (601). Based upon these metrics, a reliability factor sequence can be provided and compared against a fixed (or varying) threshold. When unreliability appears, appropriate action can be taken. For example, all of the information can be discarded, or only certain portions of the information can be discarded, as appropriate to the particular application.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
MOTOROLA, INC.SCHAUMBURG, IL7095

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gerson, Ira A Schaumburg, IL 38 1571
Winter, Eric H Oakpark, IL 3 83

Cited Art Landscape

Patent Info (Count) # Cites Year
 
HITACHI, LTD. (1)
4,823,346 Maximum likelihood decoder 26 1987
 
MOTOROLA, INC. (1)
5,113,400 Error detection system 38 1990
 
NIPPON TELEGRAPH AND TELEPHONE CORPORATION (1)
4,805,174 Error correcting coder/decoder 14 1986
 
Other [Check patent profile for assignment information] (1)
4,369,512 Digital transmission circuit using means for introducing a redundancy on the most significant bit 8 1980

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
MOTOROLA MOBILITY LLC (3)
6,732,321 Method, apparatus, and article of manufacture for error detection and channel management in a communication system 12 2001
6,700,867 Method and system for reduced memory hybrid automatic repeat request 71 2001
6,631,127 Apparatus and method for dynamically selecting an ARQ method 23 2002
 
Verticalband, Limited (3)
7,143,013 Reliable symbols as a means of improving the performance of information transmission systems 3 2001
7,110,923 Fast, blind equalization techniques using reliable symbols 1 2001
7,085,691 Reliable symbols as a means of improving the performance of information transmission systems 1 2001
 
SONY ELECTRONICS INC. (2)
6,356,595 Method and apparatus for decoding continuously coded convolutionally encoded messages 17 1998
6,657,563 Method and system for encoder signal processing with reduced routing 0 2002
 
TEXAS INSTRUMENTS INCORPORATED (2)
5,960,010 Error detection and error concealment of convolutionally encoded data 4 1997
6,735,724 Detection error estimation and method 23 2000
 
AT&T CORP. (1)
5,539,757 Error correction systems with modified Viterbi decoding 9 1993
 
ENTROPIC COMMUNICATIONS, INC. (1)
7,106,810 Method and apparatus for a demodulator circuit 6 2002
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (1)
8,635,328 Determining time varying thresholds for monitored metrics 0 2002
 
MARVELL INTERNATIONAL LTD. (1)
8,762,824 Error pattern generation for trellis-based detection and/or decoding 0 2010
 
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (1)
5,425,037 Data transmission apparatus 6 1992
 
MITSUBISHI DENKI KABUSHIKI KAISHA (1)
6,108,811 Error-correcting decoder continuously adding flag signals to locations preceding a first location at which a difference between path metrics is lower than the threshold 22 1997
 
MOTOROLA, INC. (1)
5,684,811 Method and apparatus for decoding convolutionally encoded information 16 1995
 
RAKUTEN, INC. (1)
5,901,182 Metric sifting in breadth-first decoding of convolutional coded data 24 1997
 
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) (1)
5,822,340 Method for decoding data signals using fixed-length decision window 10 1996