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    • 4. 发明授权
    • Encoder in facsimile apparatus generates code words with one bit address
indicating remaining bits are raw unencoded data when number of pixels
in a run length are below a predetermined number
    • 传真装置中的编码器产生一个位地址的代码字,指示剩余位是当游程长度的像素数目低于预定数量时的原始未编码数据
    • US5493407A
    • 1996-02-20
    • US182663
    • 1994-01-13
    • Toru Takahara
    • Toru Takahara
    • G06T9/00H03M7/46H04N1/419H04N1/415H03M7/48
    • H03M7/46G06T9/005H04N1/419
    • A pixel data encoder for use in a facsimile apparatus features a first in first out memory for storing one-dimensional binary pixel data sequences in synchronism with a data acquisition clock; a run length determiner coupled to receive the one-dimensional binary pixel data sequences stored in the first in first out memory, the run length determiner calculating a run length for each of the one-dimensinal binary pixel data sequences received; and an encoding section which issues a one-bit address signal for indicating raw data will be issued and N-bit raw data in the event that the run length is less than a predetermined run length N, the encoding section issuing an address code and a remainder code in the event that the run length exceeds N, the address code consisting of consecutive binary level "1"s with a bit length (M-2) and a binary level "0", and the remainder code consisting of a binary sequence representing the run length wherein the most significant bit of the binary sequence is omitted, M representing a total number of binary digits of the run length.
    • 用于传真装置的像素数据编码器具有先进先出的存储器,用于与数据采集时钟同步地存储一维二进制像素数据序列; 运行长度确定器,其被耦合以接收存储在所述先进先出存储器中的所述一维二进制像素数据序列,所述游程长度确定器计算接收的所述一维二进制像素数据序列中的每一者的游程长度; 并且在游程长度小于预定游程长度N的情况下,将发出发出用于指示原始数据的一位地址信号的编码部分和N位原始数据,编码部分发出地址码和 在游程长度超过N的情况下,由比特长度(M-2)和二进制级别“0”组成的连续二进制级别“1”组成的地址码,以及由二进制序列 表示省略二进制序列的最高有效位的行程长度,M表示游程长度的二进制数字的总数。