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:
Mar. 06, 2001
Filed:
Jan. 20, 1999
Vivek K. Goyal, Hoboken, NJ (US);
Lucent Technologies Inc., Murray Hill, NJ (US);
Abstract
Transform encoding techniques are disclosed which permit reductions in entropy coding memory requirements. In an illustrative embodiment, a selected discrete linear transform is applied to a discrete-valued version of an information signal to be encoded. The transform is selected such that it produces a transformed output that can be entropy coded using a reduced codeword memory without a substantial increase in entropy coding rate. The entropy coding may be, for example, scalar entropy coding which independently codes each of the components of the transformed discrete-valued version of the information signal, using a single entropy codebook for all of the components to be encoded. As another example, the entropy coding may utilize scalar entropy coding for a first subset of the components of the transformed discrete-valued version of the information signal, using a first codebook for each of the subset of components to be encoded, and vector entropy coding for a second subset of the components, using a second, larger codebook for each of the vectors to be encoded. Other types of entropy coding can also be improved through appropriate selection of the discrete transform.