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1. (WO2001037574) METHOD OF TRANSCODING

Pub. No.:    WO/2001/037574    International Application No.:    PCT/EP2000/010895
Publication Date: Sat May 26 01:59:59 CEST 2001 International Filing Date: Fri Nov 03 00:59:59 CET 2000
IPC: H04N 7/26
Applicants: KONINKLIJKE PHILIPS ELECTRONICS N.V.
Inventors: BARRAU, Eric
LE MAGUET, Yann
Title: METHOD OF TRANSCODING
Abstract:
A method of transcoding and a related device for converting an input coded signal (C1) previously quantized with a quantization scale q1 into an output coded signal (C2) quantized with a quantization scale q2. First, a variable length decoder (VLD) decodes the input coded signal, a filtering circuit (RQ) converts the decoded signal issuing from the decoder into a signal quantized on the basis of the quantization scale q2. This signal is then finally reencoded in a variable length encoder (VLC). An advantage of the filtering circuit (RQ) is to perform in a single and simple step the conversion a signal quantized with a first quantization scale into a signal quantized with a second quantization scale.