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    • 4. 发明授权
    • Method and arrangement for transformation of signals from a frequency to
a time domain
    • 信号从频率变换到时域的方法和装置
    • US5479364A
    • 1995-12-26
    • US82087
    • 1993-06-24
    • Anthony M. JonesKevin D. DewarMartin W. Sotheran
    • Anthony M. JonesKevin D. DewarMartin W. Sotheran
    • H04N1/41G06F17/14G06T1/20H04N7/30G06F7/38
    • G06F17/147
    • An IDCT, or Inverse Discrete Cosine Transform, method decimates a 2-D IDCT into two 1-D IDCT operations and then operates separately on the even and odd pixel input words. In a common processing step, selected input values are passed directly to output adders and subtractors, while others are multiplied by constant, scaled cosine values. In a pre-common processing step, the lowest-order odd input word is pre-multiplied by .sqroot.2, and the odd input words are summed pairwise before processing in a common processing step. In a post-common processing step, intermediate values corresponding to the processed odd input words are multiplied by predetermined coefficients to form odd resultant values. After calculation of the even and odd resultant values, the high-order and low-order outputs are formed by simple subtraction/addition, respectively, of the odd resultant values from/with the even resultant values. The input values are preferably scaled upward by a factor of .sqroot.2. Selected bits of some intermediate resulting data words are optionally adjusted by forcing these bits to either "1" or "0". The IDCT system includes a pre-common processing circuit (PREC), a common processing circuit (CBLK), and a post-common processing circuit (POSTC), which perform the necessary operations in the respective steps. The system also includes a controller (CNTL) to generate signals to control the loading of system latches and, preferably, to time-multiplex the application of the even and odd input words to latches in the pre-common circuit.
    • IDCT或逆离散余弦变换方法将2-D IDCT分解成两个1-D IDCT操作,然后分别对偶数和奇数像素输入字进行操作。 在通常的处理步骤中,所选择的输入值直接传递到输出加法器和减法器,而其他输入值乘以恒定的缩放余弦值。 在预共同处理步骤中,最低阶奇数输入字被预先乘以2ROOT 2,并且奇数输入字在公共处理步骤中处理之前成对加法。 在公知处理步骤中,将与处理的奇数输入字对应的中间值乘以预定系数,以形成奇数合成值。 在偶数和奇数结果值的计算之后,高次和低阶输出分别由奇偶结果值/偶数结果值的简单减法/加法形成。 输入值优选地向上按比例2ROOT 2.通过将这些位强制为“1”或“0”可选地调整某些中间结果数据字的选定位。 IDCT系统包括在各步骤中执行必要操作的预共同处理电路(PREC),公共处理电路(CBLK)和后公共处理电路(POSTC)。 该系统还包括用于产生信号以控制系统锁存器的加载的控制器(CNTL),并且优选地将偶数和奇数输入字的应用时间复用到预共同电路中的锁存器。
    • 5. 发明授权
    • Method and arrangement for transformation of signals from a frequency to
a time domain
    • 信号从频率变换到时域的方法和装置
    • US5590067A
    • 1996-12-31
    • US404067
    • 1995-03-14
    • Anthony M. JonesKevin D. DewarMartin W. Sotheran
    • Anthony M. JonesKevin D. DewarMartin W. Sotheran
    • H04N1/41G06F17/14G06T1/20H04N7/30G06F7/38
    • G06F17/147
    • An IDCT method decimates a 2-D IDCT into two 1-D IDCT operations and then operates separately on the even and odd pixel input words. In a common processing step, selected input values are passed directly to output adders and subtractors, while others are multiplied by constant, scaled cosine values. In a pre-common processing step, the lowest-order odd input word is pre-multiplied by .sqroot. 2, and the odd input words are summed pairwise before processing in a common processing step. In a post-common processing step, intermediate values corresponding to the processed odd input words are multiplied by predetermined coefficients to form odd resultant values. After calculation of the even and odd resultant values, the high-order and low-order outputs are formed by simple subtraction/addition, respectively, of the odd resultant values from/with the even resultant values. The input values are preferably scaled upward by a factor of .sqroot. 2. Selected bits of some intermediate resulting data words are optionally adjusted by forcing these bits to either "1" or "0". The IDCT system includes a pre-common processing circuit (PREC), a common processing circuit (CBLK), and a post-common processing circuit (POSTC), which perform the necessary operations in the respective steps. The system also includes a controller (CNTL) to generate signals to control the loading of system latches and, preferably, to time-multiplex the application of the even and odd input words to latches in the pre-common circuit.
    • IDCT方法将2-D IDCT分解成两个1-D IDCT操作,然后分别对偶数和奇数像素输入字进行操作。 在通常的处理步骤中,所选择的输入值直接传递到输出加法器和减法器,而其他输入值乘以恒定的缩放余弦值。 在预共同处理步骤中,最低阶奇数输入字被预先乘以2ROOT + E,rad + EE 2,并且奇数输入字在公共处理步骤中处理之前成对相加。 在公知处理步骤中,将与处理的奇数输入字对应的中间值乘以预定系数,以形成奇数合成值。 在偶数和奇数结果值的计算之后,高次和低阶输出分别由奇偶结果值/偶数结果值的简单减法/加法形成。 输入值优选地按照2ROOT + E,rad + EE2的因子向上扩展。通过将这些位强制为“1”或“0”,可选地调整一些中间结果数据字的选定位。 IDCT系统包括在各步骤中执行必要操作的预共同处理电路(PREC),公共处理电路(CBLK)和后公共处理电路(POSTC)。 该系统还包括用于产生信号以控制系统锁存器的加载的控制器(CNTL),并且优选地将偶数和奇数输入字的应用时间复用到预共同电路中的锁存器。
    • 6. 发明授权
    • Multistandard video decoder and decompression system for processing encoded bit streams including start code detection and methods relating thereto
    • 用于处理编码比特流的多标准视频解码器和解压缩系统,包括起始代码检测和与之有关的方法
    • US07711938B2
    • 2010-05-04
    • US09770157
    • 2001-01-26
    • Adrian P WiseMartin W SotheranWilliam P RobbinsAnthony M JonesHelen R FinchKevin J BoydAnthony Peter J Claydon
    • Adrian P WiseMartin W SotheranWilliam P RobbinsAnthony M JonesHelen R FinchKevin J BoydAnthony Peter J Claydon
    • G06F15/00
    • G06F9/3867G06F9/4494G06F12/0207G06F12/04G06F12/0607G06F13/16G06F13/1673G06F13/1689G06F13/28H04N19/13H04N19/42H04N19/423H04N19/61H04N19/91
    • A pipeline video decoder and decompression system handles a plurality of separately encoded bit streams arranged as a single serial bit stream of digital bits and having separately encoded pairs of control codes and corresponding data carried in the serial bit stream. The pipeline system employs a plurality of interconnected stages to decode and decompress the single bit stream, including a start code detector. When in a search mode, the start code detector searches for a specific start code corresponding to one of multiple compression standards. The start code detector responding to the single serial bit stream generates control tokens and data tokens. A respective one of the tokens includes a plurality of data words. Each data word has an extension bit which indicates a presence of additional words therein. The data words are thereby unlimited in number. A token decode circuit positioned in certain of the stages recognizes certain of the tokens as control tokens pertinent to that stage and passes unrecognized control tokens to a succeeding stage. A reconfigurable decode and parser processing means positioned in certain of the stages is responsive to a recognized control token and reconfigures a particular stage to handle an identified data token. Methods relating to the decoder and decompression system include processing steps relating thereto.
    • 流水线视频解码器和解压缩系统处理多个单独编码的比特流,其被布置为数字比特的单个串行比特流,并且具有单独编码的控制码对和串行比特流中携带的对应数据。 流水线系统采用多个互连的级来解码和解压缩单个比特流,包括起始码检测器。 当处于搜索模式时,起始代码检测器搜索与多个压缩标准之一相对应的特定开始代码。 响应于单个串行比特流的起始码检测器产生控制令牌和数据令牌。 相应的令牌包括多个数据字。 每个数据字具有指示其中存在附加字的扩展位。 因此数据字数量无限。 定位在某些阶段的令牌解码电路将某些令牌识别为与该级相关的控制令牌,并将未被识别的控制令牌传递到后续级。 定位在某些阶段的可重构解码和解析器处理装置响应于识别的控制令牌,并且重新配置特定级以处理所识别的数据令牌。 与解码器和解压缩系统相关的方法包括与其相关的处理步骤。
    • 9. 发明授权
    • Pipeline processing machine with interactive stages operable in response to tokens and system and methods relating thereto
    • 具有可响应于令牌和与之相关的系统和方法可操作的交互式阶段的管道处理机
    • US06263422B1
    • 2001-07-17
    • US08484730
    • 1995-06-07
    • Adrian P. WiseMartin W. SotheranWilliam P. Robbins
    • Adrian P. WiseMartin W. SotheranWilliam P. Robbins
    • G06F930
    • G06F9/3867G06F9/4494G06F12/0207G06F12/04G06F12/0607G06F13/16G06F13/28H04N19/13H04N19/42H04N19/423H04N19/44H04N19/61H04N19/91
    • A plurality of processing stages interposed between an input and an output of a system including a pipeline machine interconnect for conveyance of tokens along the pipeline. Control and or data tokens in the form of universal adaptation units interface with all of the stages in the pipeline and alternatively interact with selected stages in the pipeline so that the processing stages in the pipeline are afforded enhanced flexibility in configuration and processing. In one embodiment of the system, the stages accept a data stream having portions encoded according to respectively different video formats. At least one of the stages includes circuitry for generating signals to indicate an end-of-picture data decoding. The stage includes state machine logic that is responsive to the generated signals for effecting an end of picture data decoding by clearing the pipeline. A method of clearing the pipeline includes receiving a data stream, indicating an end of picture data decoding, and clearing the pipeline when an end of picture data decoding has been indicated.
    • 多个处理台,其插入在包括管道机器互连的系统的输入和输出之间,用于沿管道输送令牌。 以通用适配单元形式的控制和/或数据令牌与流水线中的所有阶段接口,并且交替地与流水线中的选定阶段进行交互,从而提供流水线处理阶段在配置和处理方面的增强灵活性。 在系统的一个实施例中,阶段接受具有根据分别不同的视频格式编码的部分的数据流。 至少一个级包括用于产生信号以指示画面结束数据解码的电路。 舞台包括响应于所产生的信号的状态机逻辑,以通过清除流水线来实现图像数据解码的结束。 清除流水线的方法包括:当已经指示图像数据解码结束时,接收指示图像数据解码结束的数据流,以及清除流水线。