Digital signal encoding/decoding apparatuses and related methods

Details Digital signal encoding/decoding apparatuses and related methods Digital signal encoding/decoding apparatuses and related methods

1997-06-10

1999-06-01

Tse, Young T.

Pulse or digital communications

Pulse code modulation

Length coding

375243, 348420, 704229, G06F 1300

Patent

active

059094672

ABSTRACT:
In a signal processing method to compress digital audio data by a block floating process, digital signal encoding/decoding apparatuses prevent deterioration of sound quality of the digital audio signal and improve the compression ratio of the digital audio signal when the digital audio signal is converted on a frequency axis per predetermined time frame, and data on the frequency axis is then divided into a plurality of blocks to be recorded, otherwise, bits are allocated per block to compress the digital audio signal for minimizing transmitted parameters. Also, encoding/decoding methods are provided to enable highly efficient encoding/decoding without recording or transmitting word length, allowing one to obtain a high-quality audio signal by allocating bits conventionally held by the word length to hold quantization data of a spectrum signal.

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