METHOD AND DEVICE FOR DECODING DIGITAL AUDIO DATA

A method and a device for decoding digital audio data are provided to parallel-process a filter bank, a deformatter, a Huffman decoder, and an inverse quantizer in order to shorten data processing time of the entire decoding system, thereby improving performance of the decoding system. A digital aud...

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Bibliographische Detailangaben
1. Verfasser:	SEO, JUNG KOOK
Format:	Patent
Sprache:	eng
Schlagworte:	ACOUSTICS BASIC ELECTRONIC CIRCUITRY CODE CONVERSION IN GENERAL CODING DECODING ELECTRICITY INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER MUSICAL INSTRUMENTS PHYSICS SPEECH ANALYSIS OR SYNTHESIS SPEECH OR AUDIO CODING OR DECODING SPEECH OR VOICE PROCESSING SPEECH RECOGNITION
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Beschreibung
Zusammenfassung:	A method and a device for decoding digital audio data are provided to parallel-process a filter bank, a deformatter, a Huffman decoder, and an inverse quantizer in order to shorten data processing time of the entire decoding system, thereby improving performance of the decoding system. A digital audio data decoding device(200) comprises an input buffer(210), a deformatter(220), a Huffman decoder(230), an inverse quantizer(240), a filter bank(250), an ALU(Arithmetic-Logic Unit,280), a controller(260), and a storage part(270). A first ROM(271) stores Huffman tables. The Huffman decoder stores the decoded result in a first RAM(274). A second ROM(272) stores index values used to carry out the inverse quantization. Entropy information from the deformatter is stored in a second RAM(275). The ALU is shared by the inverse quantizer and an IMDCT(Inverse Modified Cosine Transform,251). The filter bank includes the IMDCT and a window/overlap-add(255).