US2006080091A1

5G,4G,3G,2G

Title

Speech coder and speech decoder

Application Number:

US20050281386

Publication Date:

13-04-2006

Current Assignee:

Family ID:

Application Date:

18-11-2005

Publication Country:

US

Priority Date:

22-10-1997

Title

Speech coder and speech decoder

Application Number:

US20050281386

Family ID:

Publication Country:

US

Publication Date:

13-04-2006

Application Date:

18-11-2005

Priority Date:

22-10-1997

Current Assignee:

Abstract  Abstract

A code excited linear prediction speech decoder is provided. An adaptive codebook generates an adaptive code vector. A random codebook generates a random code vector. A synthesis filter receives a signal based on the adaptive code vector and the random code vector and performs linear prediction coefficient synthesis on the signal. The random codebook includes a pulse vector provider that provides a pulse vector having a signed unit pulse a comparator that compares a value of adaptive codebook gain with a preset threshold value a selector that selects a dispersion pattern from a plurality of dispersion patterns stored in a memory in accordance with a result of the comparison and a generator that generates the dispersed vector by convoluting the pulse vector and the selected dispersion pattern.

Note:

The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)

The information in grey was provided by the patent holder

The information in purple was extracted from the FrandAvenue

Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.

Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.

Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.

Family member:related patents or applications that share a common priority or original filing.