A Real-time Software MPEG-2 Decoder For Multimedia PCs

Murata,; Numata,; Takamizawa,; Tanaka, M.

doi:10.1109/icce.1997.625843

Cited by 11 publications

(8 citation statements)

References 6 publications

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“…Ikekawa et al report individual frame rates of 115 and 25 fps for MMX-optimized MPEG-1 and MPEG-2 (Main Profile, Main Level) decoders on a 200-MHz Pentium MMX processor [33].…”

Section: B Platform-dependent Optimization Of Complete Applicationsmentioning

confidence: 99%

Overview of research efforts on media ISA extensions and their usage in video coding

Lappalainen

Hämäläinen

Liuha

2002

IEEE Trans. Circuits Syst. Video Technol.

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This paper summarizes the results of over 25 research groups or individual researchers that have presented video coding implementations on general-purpose processors with the new single instruction multiple data media instruction set architecture extensions. The extensions are briefly introduced and the fundamentals for extensions, as well as some inherent problems, are explained. The reported attempts to utilize the extensions are divided into kernel-and application-level, as well as platform dependent and independent optimizations. Optimized applications include, in addition to some proprietary methods, all of the major video coding standards such as H.261, H.263, MPEG-4, MPEG-1, and MPEG-2. These optimized implementations include a complete video codec, several decoders, and several encoders. Additionally, a performance comparison is given for four representative encoder implementations based on the reported results. Also included is an overview of future trends for new instructions and architectural speed-up techniques. Index Terms-H.263, MPEG-4, multimedia instructions, single instruction multiple data (SIMD) media instruction set architecture (ISA) extensions, video coding.

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“…Ikekawa et al report individual frame rates of 115 and 25 fps for MMX-optimized MPEG-1 and MPEG-2 (Main Profile, Main Level) decoders on a 200-MHz Pentium MMX processor [33].…”

Section: B Platform-dependent Optimization Of Complete Applicationsmentioning

confidence: 99%

Overview of research efforts on media ISA extensions and their usage in video coding

Lappalainen

Hämäläinen

Liuha

2002

IEEE Trans. Circuits Syst. Video Technol.

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“…The required performance is approximately proportional to the average number of symbols in a bitstream processed per second. Parallel symbol decoding is possible depending on the design of the code tables [41], [42]. Application of the SIMD-type parallel instructions, however, is limited.…”

Section: A Bit-manipulation Performance and Variable-length Decodingmentioning

confidence: 99%

Multimedia processors

Kuroda

Nishitani

1998

Proc. IEEE

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This paper describes recent large-scale-integration programmable processors designed for multimedia processing such as real-time compression and decompression of audio and video as well as the generation of computer graphics. As the target of these processors is to handle audio and video in real time, the processing capability must be increased tenfold compared to that of conventional microprocessors, which were designed to handle mainly texts, figures, tables, and photographs. To clarify the advantages of a high-speed multimedia processing capability, we define these chips as multimedia processors. Recent general-purpose microprocessors for workstations and personal computers (PC's) use special built-in hardware for multimedia processing, so the multimedia processors described in this paper include these modified general-purpose microprocessors. After briefly reviewing the history of programmable processors, we classify multimedia processors into five categories depending on their basic architecture. The categories are reduced instruction set computer (RISC) microprocessors for workstations, complex instruction set computer microprocessors for PC's, embedded RISC's, low-power digital signal processors (DSP's), which are mainly used for mobile communications devices, and media processors that support PC's for multimedia applications. These five classes are then grouped into two: microprocessors with a multimedia instruction set and highly parallel DSP's. An architectural comparison between these two groups on the basis of Moving Picture Experts Group decoding applications is made, and the advantages and disadvantages of each class are clarified. Future processors, including "system on a chip," and their applications are also discussed.

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“…While more than 400 MOPS is required combining the audio and video portions for complete decoding of MPEG-2 [9], the ratio of the amount of computation required to decode the audio portion is less than 1/10 according to Refs. 9 and 10.…”

Section: Software Basic Configurationmentioning

confidence: 99%

“Trampeg”: An MPEG‐2 real‐time software transcoder for low‐bit‐rate transmission

Akutsu¹,

Kimata²,

Shimizu

et al. 2002

Systems & Computers in Japan

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SUMMARYIn the audiovisual handling of content coded by MPEG-2 transmitted over various kinds of networks such as the Internet or LAN, transformation of coding bit rates or transcoding is necessary. The simplest transcoding method is that of decoding MPEG-2 completely and then reencoding it at a lower bit rate. However, real-time processing of this method on a commonly used PC is difficult since the level of operations or the computational complexity for coding is high. However, if using the before-transformation coding information decreases the computational complexity, real-time transformation (transcoding) by software becomes possible. In this study, the Trampeg software transcoder (transcoder for MPEG-2) capable of real-time transcoding MPEG-2 with high quality has been developed. The applications, design guidelines, and processing algorithms of Trampeg are presented in this paper. The results of evaluation for operation of the system over a real PC have verified that an MPEG-2 system stream input via a network can be transcoded in real time and the transcoded low-rate stream can be transmitted directly to a streaming server.

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A Real-time Software MPEG-2 Decoder For Multimedia PCs

Cited by 11 publications

References 6 publications

Overview of research efforts on media ISA extensions and their usage in video coding

Overview of research efforts on media ISA extensions and their usage in video coding

Multimedia processors

“Trampeg”: An MPEG‐2 real‐time software transcoder for low‐bit‐rate transmission

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