CA2684379C

5G,4G,3G,2G

Title

SPEECH CODER AND SPEECH DECODER

Application Number:

CA19982684379

Publication Date:

07-01-2014

Current Assignee:

Family ID:

Application Date:

22-10-1998

Publication Country:

US

Priority Date:

22-10-1997

Title

SPEECH CODER AND SPEECH DECODER

Application Number:

CA19982684379

Family ID:

Publication Country:

US

Publication Date:

07-01-2014

Application Date:

22-10-1998

Priority Date:

22-10-1997

Current Assignee:

Abstract  Abstract

A speech coder using an orthogonal search and an orthogonal search method for reducing the number of calculation steps for vector quantization processing for ACELP type random codebook. The speech coder comprises an adaptive codebook that generates an adaptive codevector representing a pitch component a random codebook that generates a codevector representing a random component a synthesis filter that generates a synthetic speech signal and a distortion calculator that calculates distortion between an input speech signal and the synthetic speech signal. The speech coder and the orthogonal search method have characteristics in which the accuracy for the random codebook search is improved as compared with a non-orthogonal search and the quality of the synthetic speech is also improved.

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.