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Application filed by Bing-Fei Wu, Chih-Hsu Yen, Hung-Yu WeifiledCriticalBing-Fei Wu
Priority to TW92133583ApriorityCriticalpatent/TWI244828B/en
Publication of TW200518479ApublicationCriticalpatent/TW200518479A/en
Application grantedgrantedCritical
Publication of TWI244828BpublicationCriticalpatent/TWI244828B/en
Compression, Expansion, Code Conversion, And Decoders
(AREA)
Signal Processing For Digital Recording And Reproducing
(AREA)
Abstract
A method of safety-encoding a music file, for encoding the original music data safely, includes dividing several equal frequency band, Modified DCT, re-encoding positive and negative signs, quantization and bit allocation, Huffman coding, and compiling MP3 file. By safety-encoding the music file during the process of compressing it, the file can be prevented from read out correctly without being authorized. Besides, the time for encoding the whole file can be reduced.
TW92133583A2003-11-282003-11-28A method of safety-encoding a music file
TWI244828B
(en)
Lossless energy encoding method and apparatus, audio encoding method and apparatus, lossless energy decoding method and apparatus, and audio decoding method and apparatus.