| 摘要 |
In a video encoder a prediction signal at a bit resolution of P is subtracted from an input signal received at a bit resolution of P+Delta, where P is typically 8 bits, and P+Delta, 10 bits. A transform is then performed on the result, the output of which transform being at a bit resolution of at least P+Delta. The transformed signal is quantised, and the quantised signal used to form the prediction signal. The quantised signal is then coded for downstream delivery. At a decoder, the process is inverted, preserving the extra Delta bits input to the encoder.
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