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12 条记录 (耗时 0.019 秒)

    Parallel processing of digital signals in a single arithmetic/logic unit
    1.
    发明授权
    Parallel processing of digital signals in a single arithmetic/logic unit 失效
    在单个算术/逻辑单元中并行处理数字信号

    公开(公告)号：US5689592A

    公开(公告)日：1997-11-18

    申请号：US172323

    申请日：1993-12-22

    申请人： Staffan Ericsson ,  John Bruder ,  Bernd Girod

    发明人： Staffan Ericsson ,  John Bruder ,  Bernd Girod

    IPC分类号： G06F7/50 ,  G06F7/505 ,  G06F7/575 ,  G06F9/30 ,  G06K9/54

    CPC分类号： G06F7/505 ,  G06F17/147 ,  G06F7/575 ,  G06F9/30036 ,  G06F9/30105 ,  G06F9/30109 ,  G06F2207/382

    摘要： A method of processing a digital signal wherein multiple signal values are simultaneously operated upon in a single register. The register is not segmented in hardware, but is segmented by operation of a controlling computer software program. The controlling computer software arranges the digital signal in a computer memory in such a manner as to permit the register to be loaded with a plurality of digital samples, each having a precision less than the total precision available in the register. The method may include steps to partially compensate for errors introduced by carries from one segment of the register to another segment of the register, when necessary.

    摘要翻译： 一种处理数字信号的方法，其中在单个寄存器中同时操作多个信号值。 寄存器不在硬件中分段，而是由控制计算机软件程序的操作分段。 控制计算机软件以数字信号的方式将数字信号排列在计算机存储器中，以允许寄存器加载多个数字采样，每个数字样本的精度小于寄存器中可用的总精度。 该方法可以包括在必要时部分地补偿由寄存器的一个段传送到寄存器的另一个段的引入引起的误差的步骤。

    Image signal coder operating at reduced spatial resolution
    3.
    发明授权
    Image signal coder operating at reduced spatial resolution 失效

    公开(公告)号：US5854858A

    公开(公告)日：1998-12-29

    申请号：US504631

    申请日：1995-06-07

    申请人： Bernd Girod ,  Staffan Ericsson

    发明人： Bernd Girod ,  Staffan Ericsson

    IPC分类号： G06F17/14 ,  G06T9/00 ,  H04N7/46 ,  G06K9/36

    CPC分类号： H04N19/59 ,  G06F17/147

    摘要： An image processing system operates at reduced resolution to reduce computational complexity while remaining fully compatible with full resolution decoders. A video input signal is subsampled and encoded at the resulting lower resolution. The encoded signal is filled with zero terms to produce an encoded signal having the same number of terms as a full resolution encoded signal. In a motion-compensated hybrid coder, the decoder section also includes a subsampling system, so that the reconstructed video signal is produced at the same resulting lower resolution. The encoder section and the decoder section are each inverse functions of the other, eliminating a drift problem associated with prior systems.

    Method and apparatus for providing scalable pre-compressed digital video with reduced quantization based artifacts
    4.
    发明授权
    Method and apparatus for providing scalable pre-compressed digital video with reduced quantization based artifacts 有权
    用于提供具有减少的基于量化的伪像的可缩放预压缩数字视频的方法和装置

    公开(公告)号：US06480541B1

    公开(公告)日：2002-11-12

    申请号：US09177406

    申请日：1998-10-23

    申请人： Bernd Girod ,  Staffan Ericsson ,  Yuriy A. Resnik ,  Nikolaus Färber

    发明人： Bernd Girod ,  Staffan Ericsson ,  Yuriy A. Resnik ,  Nikolaus Färber

    IPC分类号： A04B166

    CPC分类号： H04N9/8042 ,  H04N19/105 ,  H04N19/12 ,  H04N19/152 ,  H04N19/172 ,  H04N19/187 ,  H04N19/39 ,  H04N19/51 ,  H04N19/59 ,  H04N19/61 ,  H04N21/23424 ,  H04N21/23439 ,  H04N21/2662 ,  H04N21/6379 ,  H04N21/64769

    摘要： A method for generating a digital motion video sequence at a plurality of bit rates uses a transitional coding source when switching between bitstreams having different bit rates during transmission of a video sequence. The transitional data may be frames coded using reconstructed frames reconstructed for a first bitstream using the characteristics of the second bitstream. These “low bit rate insert frames,” or LBIFs, contain the image characteristics of a signal coded at the lower bit rate. With a bitstream having a higher bit rate being periodically coded using an LBIF, a point of image continuity between the two bitstreams is provided. Thus, switching from one bitstream to the other at this point in the video sequence minimizes the production of artifacts caused by differences in bit rate. In another embodiment of the invention, a separate set of transitional data is created, taking the form of “switch” frames, or S-frames. The S-frames are typically the difference between a frame of a first bitstream and a frame of a second bitstream. These frames are inserted into the decoded bitstream during the transition from one bitstream to the other, and compensate for any visual artifacts that might otherwise occur due to the difference in bit rate of the two bitstreams.

    摘要翻译： 用于在多个比特率下生成数字运动视频序列的方法在视频序列的传输期间切换具有不同比特率的比特流时使用过渡编码源。 过渡数据可以是使用第二比特流的特征对使用针对第一比特流重建的重构帧进行编码的帧。 这些“低比特率插入帧”或LBIF包含以较低比特率编码的信号的图像特征。 利用具有较高比特率的比特流，使用LBIF周期性地编码，提供两个比特流之间的图像连续性点。 因此，在视频序列中的这一点上，从一个比特流切换到另一个比特流使得由比特率差异引起的伪像的产生最小化。 在本发明的另一实施例中，以“切换”帧或S帧的形式创建单独的一组过渡数据。 S帧通常是第一比特流的帧和第二比特流的帧之间的差。 在从一个比特流到另一比特流的转换期间，这些帧被插入解码的比特流中，并且补偿由于两个比特流的比特率的差异而可能出现的任何视觉伪像。

    Method and apparatus for performing fast discrete cosine transforms and fast inverse discrete cosine transforms using look-up tables
    5.
    发明授权
    Method and apparatus for performing fast discrete cosine transforms and fast inverse discrete cosine transforms using look-up tables 失效
    使用查找表执行快速离散余弦变换和快速离散余弦变换的方法和装置

    公开(公告)号：US06112219A

    公开(公告)日：2000-08-29

    申请号：US125590

    申请日：1993-09-23

    申请人： Bernd Girod ,  Staffan Ericsson

    发明人： Bernd Girod ,  Staffan Ericsson

    IPC分类号： G06F1/035 ,  G06F17/14

    CPC分类号： G06F17/147 ,  G06F1/0356

    摘要： A method is provided for performing a fast Discrete Cosine Transform (DCT) and a fast Inverse Discrete Cosine Transform (IDCT) in a software implementation. The method provided exploits symmetries found in both the DCT and IDCT. As a result of the symmetries found in the DCT and IDCT, both transforms may be performed using a combination of look-up tables and butterfly operations, thus employing only a small number of additions and subtractions and no multiplications. Furthermore, there is provided an aspect of the present invention which exploits the excess precision available in current central processing units (CPUs) relative to the precision required by the DCT and IDCT calculations.

    摘要翻译： 提供了一种用于在软件实现中执行快速离散余弦变换（DCT）和快速逆离散余弦变换（IDCT）的方法。 所提供的方法利用了DCT和IDCT中的对称性。 作为在DCT和IDCT中发现的对称性的结果，可以使用查找表和蝶形运算的组合来执行两个变换，因此仅使用少量的加法和减法而不进行乘法运算。 此外，提供了本发明的一个方面，其利用了当前中央处理单元（CPU）中可用于与DCT和IDCT计算所需的精度相关的多余精度。

    Image signal coder operating at reduced spatial resolution
    6.
    发明授权
    Image signal coder operating at reduced spatial resolution 失效
    图像信号编码器以降低的空间分辨率工作

    公开(公告)号：US5917954A

    公开(公告)日：1999-06-29

    申请号：US986841

    申请日：1997-12-08

    申请人： Bernd Girod ,  Staffan Ericsson

    发明人： Bernd Girod ,  Staffan Ericsson

    IPC分类号： G06F17/14 ,  G06T9/00 ,  H04N7/46 ,  G06K9/36

    CPC分类号： H04N19/59 ,  G06F17/147

    摘要： An image processing system operates at reduced resolution to reduce computational complexity while remaining fully compatible with full resolution decoders. A video input signal is subsampled and encoded at the resulting lower resolution. The encoded signal is filled with zero terms to produce an encoded signal having the same number of terms as a full resolution encoded signal. In a motion-compensated hybrid coder, the decoder section also includes a subsampling system, so that the reconstructed video signal is produced at the same resulting lower resolution. The encoder section and the decoder section are each inverse functions of the other, eliminating a drift problem associated with prior systems.

    摘要翻译： 图像处理系统以降低的分辨率操作以降低计算复杂性，同时保持与全分辨率解码器完全兼容。 视频输入信号以所得到的较低分辨率进行二次采样和编码。 编码信号用零项填充以产生具有与全分辨率编码信号相同数量的编码信号。 在运动补偿混合编码器中，解码器部分还包括子采样系统，使得重建的视频信号以相同的所得到的较低分辨率产生。 编码器部分和解码器部分各自是相反的功能，消除了与现有系统相关的漂移问题。

    Method and apparatus for performing fast reduced coefficient discrete cosine transforms
    7.
    发明授权
    Method and apparatus for performing fast reduced coefficient discrete cosine transforms 失效

    公开(公告)号：US5822003A

    公开(公告)日：1998-10-13

    申请号：US940191

    申请日：1997-09-29

    申请人： Bernd Girod ,  Staffan Ericsson

    发明人： Bernd Girod ,  Staffan Ericsson

    IPC分类号： G06F17/14 ,  H04N7/50

    CPC分类号： G06F17/147

    摘要： A method is provided for performing a fast 3-coefficient Discrete Cosine Transform (DCT) in a software implementation. The method provided exploits symmetries and statistical properties of the coefficients found in the DCT. As a result of the symmetries and statistical distribution of coefficients typically found in the DCT of typical images in image processing applications, the 3-coefficient DCT may be readily performed using as few as three input sample values from an input image block. The method selects the samples from locations in the image block where they are at peaks of the basis functions for the coefficients included, thus maximizing noise immunity. The method also provides for switching between performing the 3-coefficient DCT and a full (or other) DCT as required by image quality. Finally, the method may be generalized to perform a reduced coefficient DCT of any number of coefficients less than all coefficients in a complete output block.

    Method and apparatus for performing fast reduced coefficient discrete cosine transforms
    8.
    发明授权
    Method and apparatus for performing fast reduced coefficient discrete cosine transforms 失效
    用于执行快速减小系数离散余弦变换的方法和装置

    公开(公告)号：US5712809A

    公开(公告)日：1998-01-27

    申请号：US332535

    申请日：1994-10-31

    申请人： Bernd Girod ,  Staffan Ericsson

    发明人： Bernd Girod ,  Staffan Ericsson

    IPC分类号： G06F17/14

    CPC分类号： G06F17/147

    摘要： A method is provided for performing a fast 3-coefficient Discrete Cosine Transform (DCT) in a software implementation. The method provided exploits symmetries and statistical properties of the coefficients found in the DCT. As a result of the symmetries and statistical distribution of coefficients typically found in the DCT of typical images in image processing applications, the 3-coefficient DCT may be readily performed using as few as three input sample values from an input image block. The method selects the samples from locations in the image block where they are at peaks of the basis functions for the coefficients included, thus maximizing noise immunity. The method also provides for switching between performing the 3-coefficient DCT and a full (or other) DCT as required by image quality. Finally, the method may be generalized to perform a reduced coefficient DCT of any number of coefficients less than all coefficients in a complete output block.

    摘要翻译： 提供了一种用于在软件实现中执行快速3系数离散余弦变换（DCT）的方法。 所提供的方法利用DCT中的系数的对称性和统计特性。 作为通常在图像处理应用中的典型图像的DCT中发现的系数的对称性和统计分布的结果，可以使用来自输入图像块的少至三个输入样本值来容易地执行3系数DCT。 该方法从图像块中的位置中选择样本，其中它们在包括的系数的基函数的峰值处，从而最大化抗噪声性。 该方法还提供了在图像质量所要求的情况下在执行3系数DCT和全（或其他）DCT之间进行切换。 最后，该方法可以被推广以执行小于完整输出块中的所有系数的任何数量的系数的减小的系数DCT。