AUDIO SIGNAL ENCODER AND AUDIO SIGNAL DECODER

Title:

AUDIO SIGNAL ENCODER AND AUDIO SIGNAL DECODER

Document Type and Number:

Japanese Patent JP2001094434

Kind Code:

A

Abstract:

To generate coded data by inserting 2nd information different from an audio signal into the audio signal without deterioration of sound quality of the audio signal and to decode the coded data to extract the audio signal and the 2nd information.

An psychoacoustic analyzer 2 analyzes an audible frequency band in the audio signal being a 1st signal to calculate an audible limit as a psychoracoustic parameter. Second information different from the audio signal is inserted to a frequency band for a sound inaudible to humans in the audio signal is inserted to the audio signal based on the psychoacoustic parameter. Furthermore, the audio signal to which the 2nd information is inserted is decoded based on the psychoacoustic parameter to extract the audio signal and the 2nd information.

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Inventors:

NISHITANI KATSUYOSHI

Application Number:

JP26912799A

Publication Date:

April 06, 2001

Filing Date:

September 22, 1999

Export Citation:

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Assignee:

VICTOR COMPANY OF JAPAN

International Classes:

G10L19/02; G09C5/00; G10L19/018; H03M7/30; (IPC1-7): H03M7/30; G09C5/00

Attorney, Agent or Firm:

Nihei Masataka

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