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Decoding apparatus, decoding method, encoding apparatus, encoding method, image processing system, and image processing method

  • US 6,795,498 B1
  • Filed: 05/22/2000
  • Issued: 09/21/2004
  • Est. Priority Date: 05/24/1999
  • Status: Expired due to Fees
First Claim
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1. A decoding apparatus comprising:

  • decoding means for decoding an input bit stream to generate image data;

    parameter generating means for generating coding parameters of each layer, to be used to encode the image data again, which has been generated by the decoding means; and

    error flag generating means for generating an error flag which indicates whether the coding parameters generated for each layer by the parameter generating means can be effectively used to encode the image data again;

    whereby the operation of encoding the image data again includes counting a number of times that image data corresponding to a picture-coding type employed in the prior coding is continuously input from said decoding means, and the operation of generating said coding parameters is performed in accordance with the count; and

    whereby when a predetermined number of pictures of one type are continuously input from said decoding means, the picture coding type is changed for at least one of said predetermined number of pictures of said one type.

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