Importance

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Abstract

To control the bit rate, the de-quantization and quantization would spend a lot of valuable time. However, the bit rate would mainly depend on the level of quantization scale, so the bit rate could be controlled just through the manipulation of the quantization scale. The method of the present invention comprises steps of receiving a bitstream including the compressed data; performing variable length decoding (VLD) of the bitstream to obtain block data therein; multiplying the block data by a quantization scale ratio; and performing variable length coding (VLC) of the bitstream to generate the compressed data with the desired bit rate. With the method provided by the present invention, the transcoding process could be speedy and efficient without the performing of de-quantization and quantization steps.

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First Claim