Minimal buffering method and system for optimized encoding tables in
JPEG compression
    1.
    发明授权
    Minimal buffering method and system for optimized encoding tables in JPEG compression 失效
    JPEG压缩优化编码表的最小缓冲方法和系统

    公开(公告)号:US6081211A

    公开(公告)日:2000-06-27

    申请号:US56747

    申请日:1998-04-08

    摘要: An apparatus, method and system optimizes Huffman codes within the Huffman tables without requiring buffering an entire uncompressed original image. Compression of a whole image is performed prior to storage in a buffer. Therefore, the necessary buffer size for performing computation of symbol frequencies in order to optimize Huffman codes is reduced. Default Huffman codes are used to pre-compress the image for storage in the buffer. Simultaneously, the input symbol frequency is determined to produce optimized Huffman codes. The optimized Huffman codes are used to optimally re-encode the encoded image data to reduce the space of the re-encoded data. The optimally encoded image data can then be stored and/or transmitted.

    摘要翻译: 装置,方法和系统优化霍夫曼表内的霍夫曼码,而不需要缓冲整个未压缩的原始图像。 在存储在缓冲器中之前执行整个图像的压缩。 因此,为了优化霍夫曼码,用于执行符号频率的计算所需的缓冲器大小被减小。 默认的霍夫曼码用于预压缩图像以存储在缓冲区中。 同时,确定输入符号频率以产生优化的霍夫曼码。 优化的霍夫曼码用于对编码的图像数据进行最佳重新编码,以减少再编码数据的空间。 然后可以存储和/或发送最佳编码的图像数据。