Method of compressing sounds in mobile terminals

Details Method of compressing sounds in mobile terminals Method of compressing sounds in mobile terminals

2007-11-20

2007-11-20

Ghayour, Mohammed (Department: 2611)

Pulse or digital communications

Pulse code modulation

Differential

C704S212000

Reexamination Certificate

active

10661297

ABSTRACT:
A method of compressing sounds in mobile terminals according to the present invention transforms pulse code modulations (PCM) codes, which are source data of bell sounds using recorded sounds or voice memos and are generated by sampling the sounds, through applying a differential method and, then, compresses the PCM codes using Lempel Ziv Welch (LZW) compresses technique, thus reducing a storage space required for storing bell sounds using sounds or voice memos in mobile terminals. According to the present invention, compression efficiency is maximized upon using LZW algorithm by transforming PCM code through applying differential method, thereby increasing restoration efficiency of original sounds and heightening compression efficiency by about 50%, compared with the existing compression storage method using ADPCM.

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