The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 08, 2010
Filed:
Oct. 26, 2004
Haosong Fu, Levittown, PA (US);
Azzedine Touzni, Doylestown, PA (US);
Raghuram Behara, Langhorne, PA (US);
Ajay Bhaskaran, Bensalem, PA (US);
Samir N. Hulyalkar, Newtown, PA (US);
Haosong Fu, Levittown, PA (US);
Azzedine Touzni, Doylestown, PA (US);
Raghuram Behara, Langhorne, PA (US);
Ajay Bhaskaran, Bensalem, PA (US);
Samir N. Hulyalkar, Newtown, PA (US);
Abstract
A trellis decoder decodes a stream of encoded symbols, including symbols of a first type (e.g. symbols encoded with a first trellis code) and symbols of a second type (e.g. encoded with a second, more robust, trellis code), without storing path indicators along a trellis for symbols of the first type. In this way, limited memory may be used to store path indicators along the trellis for symbols of the second type. This allows for more accurate decoding of the symbols of the second type. For transitions from symbols of the second type to symbols of the first type, states of the trellis decoder may be stored. In this way, paths may be traced back along the trellis for trellis decoding, without the path indicators for the symbols of the first type.