| 摘要 |
<p>PURPOSE:To prevent sudden increase in transmission data when a scene change takes place. CONSTITUTION:Whether a color identification signal (10) is a luminance signal or a color difference signal is discriminated in the step S11, and when the signal is the luminance signal, a Qs(Y) for use of the luminance signal is selected as a Qs in the step S12, and when the signal is the color difference signal, a Qs(C) for use of the color difference signal is selected as a Qs in the step S13. Moreover, in the processing 2, the processing of underflow countermeasures and overflow countermeasures for a transmission buffer is performed. When there is a scene change notice signal (9) and a quantization step width (8) is < Qs, the Qs is substituted in the quantization step width (8).</p> |
