Audio decoding device

• US 20060265227A1
• Filed: 05/11/2006
• Published: 11/23/2006
• Est. Priority Date: 05/11/2005
• Status: Abandoned Application

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Sadamura, Noriaki, Nishio, Kosuke
• Application Number:
  US11/431,625
• Publication Number:
  US 20060265227A1
• Time in Patent Office: Days
• US Class Current: 704/503
• CPC Class Codes: G10L 19/173 Transcoding, i.e. converting between two coded representations avoiding cascaded coding-decoding

Abstract

A header format information determination section reads header format information to determine whether or not a stream conforms to IEC 61937-6. A header format information conversion section acquires or prepares information on sync words, the sampling frequency, the number of channels and the length of audio data for a stream not conforming to IEC 61937-6, and converts the information to header format information defined in IEC 61937-6. A digital audio signal output section outputs the converted stream.

Claims

1. An audio decoding device comprising:

an input section for receiving a coded first digital audio signal;

a determination section for determining whether or not the first digital audio signal conforms to a given digital interface standard;

a conversion section for converting the first digital audio signal to a second digital audio signal conforming to the given digital interface standard if the first digital audio signal does not conform to the given digital interface standard; and

an output section for outputting the second digital audio signal.

2. The device of claim 1, wherein the conversion section converts only header format information of the first digital audio signal.

3. The device of claim 2, wherein the first digital audio signal is of MPEG-4 AAC storage type or multi-channel type, and the second digital audio signal is of MPEG-4 AAC transport type.

4. The device of claim 1, wherein the coding system of the first digital audio signal is MPEG-4 AAC, and the coding system of the second digital audio signal is MPEG-2 AAC.