Entropy encoder/decoder
    2.
    发明授权
    Entropy encoder/decoder 失效
    熵编码器/解码器

    公开(公告)号:US06765510B2

    公开(公告)日:2004-07-20

    申请号:US10371630

    申请日:2003-02-20

    IPC分类号: H03M734

    CPC分类号: G06T9/005 H03M7/4006

    摘要: An EBCOT codec (1) is provided which includes a bit modeling unit (11), arithmetic codec (12), input FIFO memory (13), output FIFO memory (14) and a controller (16). The input and output FIFO memories (13) and (14) have a function to control the bit length of to-be-stored data correspondingly to that of supplied data. For the coding, the input FIFO memory (13) is supplied with a wavelet transform coefficient of 16 bits, and for the decoding, it is supplied with a code data of 8 bits. For the coding, the output FIFO memory (14) outputs 8-bit code data, and for the decoding, it outputs wavelet transform coefficients of 16 bits. Thus, the circuit scale can be reduced and data transfer speed be improved.

    摘要翻译: 提供了一种EBCOT编解码器(1),其包括位建模单元(11),算术编解码器(12),输入FIFO存储器(13),输出FIFO存储器(14)和控制器(16)。 输入和输出FIFO存储器(13)和(14)具有对应于所提供数据的位长度来控制待存储数据的位长的功能。 对于编码,输入FIFO存储器(13)被提供有16位的小波变换系数,并且对于解码,它被提供有8位的代码数据。 对于编码,输出FIFO存储器(14)输出8位代码数据,对于解码,它输出16位的小波变换系数。 因此,可以减小电路规模,提高数据传输速度。