Title:
【発明の名称】音声データ圧縮方法、音声データ伸張方法、音声データ圧縮装置、音声データ伸張装置および記録媒体
Document Type and Number:
Japanese Patent JP3131647
Kind Code:
B1
Abstract:
PROBLEM TO BE SOLVED: To make compressing and expanding of audio data employing difference audio data executable with a simple algorithm. SOLUTION: An effective difference data generating section 20 divides the difference data obtained in a difference section 10 into a most significant bit and absolute value data that are other than the most significant bit, retrieves the data from a significant bit side and extracts four-bit effective difference data from the bit position where a first digital value '1' appears. A code added effective difference data generating section 40 generates code added effective difference data that are made by combining code bits and the effective difference data. A shift amount computing section 50 obtains the amount of shift of the effective difference data with respect to the absolute value data. A compressed data output section 50 combines the code added effective difference data and the amount of shift to obtain compressed audio data and outputs the data to a memory 60.
Inventors:
Kazuki Muraoka
Application Number:
JP2000234862A
Publication Date:
February 05, 2001
Filing Date:
August 02, 2000
Export Citation:
Assignee:
Casey Japan Co., Ltd.
International Classes:
G10L19/00; H03M7/40; (IPC1-7): G10L19/00
Domestic Patent References:
| JP62190930A | ||||
| JP546176A | ||||
| JP7182000A | ||||
| JP10173541A |
Attorney, Agent or Firm:
Hiroshi Nemoto
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