Method and apparatus for compressing arbitrary data
    4.
    发明授权
    Method and apparatus for compressing arbitrary data 失效
    用于压缩任意数据的方法和装置

    公开(公告)号:US5710562A

    公开(公告)日:1998-01-20

    申请号:US521750

    申请日:1995-08-31

    CPC分类号: H03M7/42 G06T9/005 H03M7/4006

    摘要: An encoding and decoding system that includes a model implemented hardware or software that is capable of operating on arbitrary data (e.g., data of a different or variety of types.) The model generates a context and binary decision for each symbol, which a binary entropy coder that uses to generate a compressed bit stream. One context model is operable with arbitrary data and uses context bins of various orders to generate a context and a decision for each symbol in an input symbol stream. An entropy coder estimates probability and generates compressed data stream in response to contexts and decisions from the model and according to generated probability estimates.

    摘要翻译: 一种编码和解码系统,其包括能够对任意数据进行操作的模型实现的硬件或软件(例如,不同类型的数据)。该模型为每个符号生成上下文和二进制决策,二进制熵 用于生成压缩比特流的编码器。 一个上下文模型可以与任意数据一起使用,并且使用各种顺序的上下文区段来为输入符号流中的每个符号生成上下文和决定。 熵编码器估计概率并响应于来自模型的上下文和决策并根据生成的概率估计产生压缩数据流。

    Reversible DCT for lossless-lossy compression
    5.
    发明授权
    Reversible DCT for lossless-lossy compression 失效
    用于无损耗压缩的可逆DCT

    公开(公告)号:US07313286B2

    公开(公告)日:2007-12-25

    申请号:US10819570

    申请日:2004-04-06

    IPC分类号: G06K9/36 G06K9/46

    CPC分类号: G06T9/007

    摘要: A reversible Discrete Cosine Transform (DCT) is described. The reversible DCT may be part of a compressor in a system. The system may include a decompressor with a reversible inverse DCT for lossless decompression or a legacy decompressor with an inverse DCT for lossy decompression.

    摘要翻译: 描述了可逆的离散余弦变换(DCT)。 可逆DCT可以是系统中压缩机的一部分。 该系统可以包括具有用于无损解压缩的可逆逆DCT的解压缩器或具有用于有损解压缩的逆DCT的传统解压缩器。

    Overlapped reversible transforms for unified lossless/lossy compression
    7.
    发明授权
    Overlapped reversible transforms for unified lossless/lossy compression 失效
    用于统一无损/有损压缩的重叠可逆变换

    公开(公告)号:US5999656A

    公开(公告)日:1999-12-07

    申请号:US784366

    申请日:1997-01-17

    CPC分类号: H04N19/635

    摘要: Recently, a number of reversible wavelet transforms have been identified which allow for exact reconstruction in integer arithmetic. Different transforms vary in how rounding is performed. The present invention provides a transform, which is linear except for the rounding with non-linear operations in order to create a reversible implementation. Also, the present invention also provides transforms which are decomposed into all finite inpulse response parts.

    摘要翻译: 最近,已经确定了许多可逆小波变换,其允许在整数运算中进行精确重建。 不同的变换在执行四舍五入方面有所不同。 本发明提供了一种变换,除了用于非线性操作的舍入以外,它是线性的,以便产生可逆的实现。 此外,本发明还提供了被分解成所有有限脉冲响应部分的变换。