| 摘要 |
<p>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 + Δ, where P is typically 8 bits, and P + Δ, 10 bits. A transform is then performed on the result, the output of which transform being at a bit resolution of at least P + Δ. 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 Δ bits input to the encoder.</p> |
