Coding apparatus and decoding apparatus

Patent metadata

Field	Value
Publication number	US-9105264-B2
Application number	US-201013121991-A
Country	US
Kind code	B2
Filing date	Jul 30, 2010
Priority date	Jul 31, 2009
Publication date	Aug 11, 2015
Grant date	Aug 11, 2015

Abstract

A coding apparatus which suppresses an extreme increase in a bit rate, includes: a downmixing and coding unit ( 301 ) that downmixes audio signals that have been provided, to reduce the number of channels to be fewer than the number of the provided audio signals, and to code the downmix signals; an object parameter extracting unit ( 304 ) that extracts parameters indicating correlation between the audio signals; and a multiplexing circuit ( 309 ) that multiplexes the extracted parameters with the generated downmix coded signals. The object parameter extracting unit ( 304 ) includes: an object classifying unit ( 305 ) that classifies each of the provided audio signals into a predetermined one of types based on audio characteristics; and an object parameter extracting circuit ( 308 ) that extracts parameters using a temporal granularity and a frequency granularity each of which is determined for a corresponding one of the types.

First claim

The invention claimed is:

1. A coding apparatus comprising:
a downmixing and coding unit configured to downmix audio object signals that have been provided into audio object signals having the number of channels fewer than the number of the provided audio object signals, and to code the downmix signals;
a parameter extracting unit configured to extract, from the provided audio object signals, object parameters indicating correlation between the audio object signals; and
a mult…

Assignees

• Ishikawa Tomokazu
• Norimatsu Takeshi
• Chong Kok Seng
• Zhou Huan
• Panasonic Ip Man Co Ltd

Inventors

• Ishikawa Tomokazu
• Norimatsu Takeshi
• Chong Kok Seng
• Zhou Huan

Classifications

• H04S2420/03

  Electricity · mapped topic

• G10L19/008 Primary

  Physics · mapped topic