公开(公告)号：US20030191788A1

公开(公告)日：2003-10-09

申请号：US10120210

申请日：2002-04-09

Applicant: SONY CORPORATION & SONY ELECTRONICS INC.

Inventor： Cheung Auyeung ,  Huipin Zhang

IPC: G06F007/52

CPC classification number: G06F7/4873 ,  G06F2207/3828

Abstract: Methods for enhancing the performance of quantization operations by converting division operations to a combination of multiplication and shift operations, which are preferably performed on a processor supporting single-instruction multiple-data (SIMD) instructions. A table of mantissa and exponent values is created for a sufficient range of values for 1/a. During quantization, the mantissa and exponent values are found in the table 1/a for associated with a given quantization division operation given by b/a which is found according to the formula b/anull(bnullA)>>n. Aspects are described for application to processors that do not support non-uniform shift operations, and for reducing the necessary bit-width of the operations to increase efficiency. The quantization method may be applied to protocols such as MPEG-2 and other similar formats.

Abstract translation: 通过将分割操作转换为乘法和移位操作的组合来提高量化操作的性能的方法，其优选地在支持单指令多数据（SIMD）指令的处理器上执行。 为1 / a的足够范围的值创建一个尾数和指数值表。 在量化期间，在表1 / a中找到与根据公式b / a =（bxA）>> n找到的由b / a给出的给定量化除法运算相关联的尾数和指数值。 被描述为适用于不支持不均匀移位操作的处理器的方面，并且用于减少操作的必要位宽以提高效率。 量化方法可以应用于诸如MPEG-2和其他类似格式的协议。

公开(公告)号：US20030185304A1

公开(公告)日：2003-10-02

申请号：US10112623

申请日：2002-03-29

Applicant: SONY CORPORATION & SONY ELECTRONICS INC.

Inventor： Cheung Auyeung

IPC: H04N007/12

CPC classification number: H04N5/145 ,  H04N19/51 ,  H04N19/56 ,  H04N19/577 ,  H04N19/61

Abstract: A method of speeding the computation of backward motion vector estimates which are derived from fields which are available from forward motion vector estimates as based on nearest neighbor criterion. The method allows for the generation of multi-frame backwards motion vectors. The invention of the present method for estimating backward motion vectors is particularly well-suited for use with the MPEG-2 video standard.

Abstract translation: 一种加速向后运动矢量估计的计算的方法，该方法是从基于最近邻标准的前向运动矢量估计可获得的场导出的。 该方法允许产生多帧向后运动矢量。 用于估计后向运动矢量的本方法的发明特别适合于与MPEG-2视频标准一起使用。