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    • 2. 发明申请
    • METHOD AND APPARATUS FOR VARIABLE SIGMA-DELTA MODULATION
    • 用于可变SIGMA-DELTA调制的方法和装置
    • WO2006065482A2
    • 2006-06-22
    • PCT/US2005/042517
    • 2005-11-22
    • AGILENT TECHNOLOGIES, INC.
    • KO, Herbert, L.
    • H04B14/06
    • H03M7/3015
    • A method [100] for modulating a digital input signal [102] is disclosed. The digital input signal [102] is partitioned into a less-significant bit signal [108] and a more-significant bit signal [106]. A lower-order modulation of the less-significant bit signal [108] is performed to generate an intermediate output signal [112]. The intermediate output signal [112] is appended to the more-significant bit signal [106] to form an intermediate input signal [116]. A higher-order modulation of the intermediate input signal [116] is performed to generate a digital output signal [120]. The higher-order modulation is of an order higher than the lower-order modulation. A phase locked loop [400] using the method [300] and apparatus [100] is disclosed.
    • 公开了一种用于调制数字输入信号[102]的方法[100]。 数字输入信号[102]被划分为较低有效位信号[108]和更高有效位信号[106]。 执行较低有效位信号[108]的低阶调制以产生中间输出信号[112]。 中间输出信号[112]附加到更高有效位信号[106]以形成中间输入信号[116]。 执行中间输入信号[116]的高阶调制以产生数字输出信号[120]。 高阶调制的次序比低阶调制高。 公开了使用方法[300]和装置[100]的锁相环[400]。
    • 7. 发明申请
    • LOW COST VIDEO COMPRESSION USING FAST, MODIFIED Z-CODING OF WAVELET PYRAMIDS
    • 低成本视频压缩使用快速,修改的Z编码的小波变换
    • WO0031878A9
    • 2000-11-09
    • PCT/US9927482
    • 1999-11-19
    • INTERVAL RESEARCH CORP
    • LYNCH WILLIAM CKOLAROV KRASIMIR DARRIGHI WILLIAM J
    • G06T9/00H03M7/40H04N7/26H03M7/34G06K9/36G06K9/46H03M7/00H04B14/06H04N11/02
    • H03M7/4006H03M7/40H04N19/10H04N19/13H04N19/61H04N19/63H04N19/647H04N19/91
    • An entropy video coder (100) for wavelet pyramids. It uses a modified Z-coder (116) to code the zero/non-zero significance function and Huffman coding for the non-zero coefficients themselves. The encoding unit (100) includes a significance function generator (112) that receives coefficients and outputs a single significance bit. A zero coefficient eliminator (114) receives coefficients in parallel with the significance function generator (112) and outputs coefficients if non-zero. Output from the significance function generator (112) is coded using the modified Z-coder (116). Output from the zero coefficient eliminator (114) is coded using Huffman coding (118). Both outputs are combined (120) to form the resulting compressed stream (122). The modified Z-coder (116) is similar to a standard Z-coder but uses a different technique for the LPS (least probable symbol) case during encoding and decoding.
    • 一种用于小波金字塔的熵视频编码器(100)。 它使用经修改的Z编码器(116)对零/非零重要性函数进行编码,并对非零系数本身进行霍夫曼编码。 编码单元(100)包括接收系数并输出单个有效位的有效函数发生器(112)。 零系数消除器(114)接收与有效函数发生器(112)并联的系数,并且如果非零则输出系数。 来自有效函数发生器(112)的输出使用经修改的Z编码器(116)进行编码。 来自零系数消除器(114)的输出使用霍夫曼编码(118)进行编码。 两个输出被组合(120)以形成所得到的压缩流(122)。 修改的Z编码器(116)类似于标准Z编码器,但是在编码和解码期间对于LPS(最不可能的符号)情况使用不同的技术。
    • 9. 发明申请
    • A SELF-INITIALIZED CODER AND METHOD THEREOF
    • 一种自我初始化的编码器及其方法
    • WO1997027681A1
    • 1997-07-31
    • PCT/US1996020862
    • 1996-12-16
    • MOTOROLA INC.
    • MOTOROLA INC.HULL, Andrew, W.
    • H04B14/06
    • H04B14/06
    • A self initialized coder and method thereof, the coder arranged and constructed for decoding an information stream (217), the coder including a buffer (301) for storing a portion (403) of the information stream, a controller (313) coupled to the buffer (301) for temporally reversing a first part (401) of the portion to provide a file header (415), and an adaptive decoder (213) having a state parameter, the adaptive decoder (213) coupled to the controller (313) and the buffer (301), for decoding the file header (415) to provide an estimate of the state parameter and thereafter for decoding, using the estimate, the portion (403) to provide a decoded signal.
    • 一种自我初始化的编码器及其方法,编码器被布置和构造用于解码信息流(217),编码器包括用于存储信息流的一部分(403)的缓冲器(301),耦合到 用于暂时反转该部分的第一部分(401)以提供文件头(415)的缓冲器(301)和具有状态参数的自适应解码器(213),耦合到控制器(313)的自适应解码器(213) 和缓冲器(301),用于对文件头(415)进行解码以提供状态参数的估计,然后使用该估计解码部分(403)以提供解码信号。
    • 10. 发明申请
    • COMPLEXITY DETERMINING APPARATUS
    • 复杂度测定装置
    • WO1995029541A1
    • 1995-11-02
    • PCT/US1994004456
    • 1994-04-22
    • THOMSON CONSUMER ELECTRONICS, INC.OZKAN, Mehmet, KemalGIRONS, Regis, Saint
    • THOMSON CONSUMER ELECTRONICS, INC.
    • H04B14/06
    • H04B14/046H04N19/124H04N19/14H04N19/146H04N19/149H04N19/152H04N19/176H04N19/177H04N19/61H04N21/2365H04N21/4347
    • Apparatus for determining a complexity measure of a data signal is disclosed which includes an encoder (14), having an input terminal (5) responsive to a data input signal (DATA IN) and a data output terminal producing a coded output signal (DATA OUT) representing the data input signal (DATA IN) at a constant bit rate. The encoder (14) includes a variable quantizer (46), responsive to the data input signal (DATA IN), for producing a quantized signal, representing the data input signal (DATA IN), having a quantizing step size defined in response to a quantizing step size control signal (QMB). A bit rate regulator (49) produces the quantizing step size control signal (QMB) in response to the bit rate of the coded output signal (TMB) and a quota input signal (Q). A complexity analyzer (14) generates a complexity representative signal (Xpic) related to the quantizing step size (QMB) and the bit rate of the coded output signal (TMB).
    • 公开了一种用于确定数据信号的复杂度测量的装置,其包括编码器(14),其具有响应数据输入信号(DATA IN)的输入端(5)和产生编码输出信号(DATA OUT )以恒定的比特率表示数据输入信号(DATA IN)。 编码器(14)包括响应于数据输入信号(DATA IN)的可变量化器(46),用于产生表示数据输入信号(DATA IN)的量化信号,该量化信号具有响应于 量化步长控制信号(QMB)。 比特率调节器(49)响应于编码输出信号(TMB)的比特率和配额输入信号(Q)产生量化步长控制信号(QMB)。 复杂度分析器(14)产生与量化步长(QMB)相关的复杂代表信号(Xpic)和编码输出信号(TMB)的比特率。