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Video encoding apparatus and method

  • US 7,023,914 B2
  • Filed: 01/26/2001
  • Issued: 04/04/2006
  • Est. Priority Date: 02/29/2000
  • Status: Expired due to Fees
First Claim
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1. A video encoding apparatus comprising:

  • a feature amount computation unit configured to divide an input video signal into a plurality of scenes each comprising at least one temporally-continuous frame, and compute a statistical feature amount for each scene;

    an encoding parameter generator to generate an encoding parameter for each scene based on the statistical feature amount computed by the feature amount computation unit;

    a number-of-generated-bits prediction unit configured to predict the number of bits to be generated when the input video signal is encoded using the encoding parameter generated by the encoding parameter generator;

    an encoding parameter correcting unit configured to correct the encoding parameter based on a result of the prediction of the number of generated bits which is obtained by the number-of-generated-bits prediction unit;

    an encoder to encode the input video signal using the corrected encoding parameter and generate an encoded bit stream; and

    an output unit configured to output the encoded bit stream generated by the encoder as an encoded output, wherein the encoding parameter generator includes a setting unit configured to correct a frame rate as well as a quantization step by setting a weighted parameter to the frame rate as well as setting a weighted parameter to the quantization step size for macro blocks of frames to be encoded for each scene on the bases of the statistical feature amount relating to a distribution of luminance for each macro block.

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