首页> 外文会议>Conference on Real-Time Image Processing; 20080128-29; San Jose,CA(US) >A Real-time Wavelet-based Video Decoder using SIMD Technology
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A Real-time Wavelet-based Video Decoder using SIMD Technology

机译:使用SIMD技术的基于小波的实时视频解码器

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This paper presents a fast implementation of a wavelet-based video codec. The codec consists of motion-compensated temporal filtering (MCTF), 2-D spatial wavelet transform, and SPIHT for wavelet coefficient coding. It offers compression efficiency that is competitive to H.264. The codec is implemented in software running on a general-purpose PC, using C programming language and streaming SIMD extensions intrinsics, without assembly language. This high-level software implementation allows the codec to be portable to other general-purpose computing platforms. Testing with a Pentium 4 HT at 3.6GHz (running under Linux and using the GCC compiler, version 4), shows that the software decoder is able to decode 4CIF video in real-time, over 2 times faster than software written only in C language. This paper describes the structure of the codec, the fast algorithms chosen for the most computationally intensive elements in the codec, and the use of SIMD to implement these algorithms.
机译:本文提出了一种基于小波的视频编解码器的快速实现。编解码器由运动补偿时间滤波(MCTF),二维空间小波变换和用于小波系数编码的SPIHT组成。它提供的压缩效率可与H.264竞争。编解码器使用C编程语言和流式SIMD扩展内在函数(无需汇编语言)在通用PC上运行的软件中实现。这种高级软件实现使编解码器可移植到其他通用计算平台。在3.6GHz的Pentium 4 HT上进行的测试(在Linux下运行并使用GCC编译器,版本4)显示,该软件解码器能够实时解码4CIF视频,比仅使用C语言编写的软件快2倍以上。本文介绍了编解码器的结构,为编解码器中计算量最大的元素选择的快速算法,以及使用SIMD来实现这些算法。

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