Patent · US Active

Split gain shape vector coding

US9385750B2 · kind B2 · utility

4Cited by

0References

30Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

Erik Norvell · Stockholm, SE
Volodya Grancharov · Solna, SE
Tomas Jansson Toftgård · Uppsala, SE

Key dates

Filing date	Nov 11, 2014
Grant date	Jul 5, 2016
Priority date	—
Expiry date	Nov 11, 2034

Classification

Technology area (CPC H)Electricity
CPC primaryH04N19/61
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

The invention relates to an encoder and a decoder and methods therein for supporting split gain shape vector encoding and decoding. The method performed by an encoder, where the encoding of each vector segment is subjected to a constraint related to a maximum number of bits, BMAX, allowed for encoding a vector segment. The method comprises, determining an initial number, Np—init, of segments for a target vector x; and further determining an average number of bits per segment, BAVG, based on a vector bit budget and Np—init. The method further comprises determining a final number of segments to be used, for the vector x, in the gain shape vector encoding, based on energies of the Np—init segments and a difference between BMAX and BAVG. The performing of the method enables an efficient allocation of the bits of the bit budget over the target vector.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.