Patent ID: 8175151

Claim:
An encoder, comprising: a memory; a first encoding unit coupled to a third encoding unit, discrete cosine transforming an input frame, quantizing the transformation result, and generating a first frame according to a motion vector, wherein the first encoding unit comprises a first feedback unit dequantizing the transformation result, generating a processing signal and a first reconstruction signal according to the dequantization result, and requantizing the processing signal to generate a requantization signal; and a second encoding unit coupled to the third encoding unit, encoding according to the first reconstruction signal to generate a second frame and an encoding signal, wherein the third encoding unit generates a third frame according to the encoding signal and the requantization signal, wherein the third encoding unit comprises: a third-encoding-unit adder subtracting the requantization signal from the encoding signal; and a third-encoding-unit statistic encoding unit statistically encoding the output of the third-encoding-unit adder to generate the third frame, and wherein the second encoding unit comprises: a second-encoding-unit transformation unit receiving the first reconstruction signal and discrete cosine transforming the first reconstruction signal to generate a second-encoding-unit first signal; a second-encoding-unit first adder subtracting a second-encoding-unit second signal from the second-encoding-unit first signal; a second-encoding-unit quantization unit quantizing the output of the second-encoding-unit adder to generate a second-encoding-unit third signal; and a second-encoding-unit statistic encoding unit statistically encoding the second-encoding-unit third signal and the motion vector to generate the second frame; and a second-encoding-unit feedback unit comprising: a second-encoding-unit dequantization unit receiving the second-encoding-unit third signal and dequantizing the second-encoding-unit third signal; a second-encoding-unit second adder adding the output of the second-encoding-unit dequantization unit and the second-encoding-unit second signal; a second-encoding-unit signal processing unit processing the output of the second-encoding-unit second adder to generate a second fifth signal; and a second-encoding-unit requantization unit requantizing the second fifth signal to generate the second-encoding-unit second signal and the encoding signal.