文件列表:

video\decoder\CHANGES (2606, 1997-06-17)
video\decoder\config.h (1539, 1996-01-09)
video\decoder\display.c (33673, 1996-01-03)
video\decoder\EXAMPLES (1488, 1996-01-09)
video\decoder\getbits.c (4388, 1995-12-31)
video\decoder\getblk.c (12763, 1996-01-09)
video\decoder\gethdr.c (29540, 1997-06-17)
video\decoder\getpic.c (34015, 1996-01-09)
video\decoder\getvlc.c (15354, 1996-01-07)
video\decoder\getvlc.h (20126, 1996-01-09)
video\decoder\global.h (14080, 1996-01-07)
video\decoder\idct.c (5757, 1996-01-09)
video\decoder\idctref.c (2886, 1996-01-09)
video\decoder\IEEE1180 (11486, 1996-01-09)
video\decoder\Makefile (3559, 1996-01-09)
video\decoder\motion.c (7026, 1996-01-09)
video\decoder\mpeg2dec.c (18505, 1996-01-09)
video\decoder\mpeg2dec.h (4041, 1996-01-09)
video\decoder\recon.c (15541, 1996-01-09)
video\decoder\SPATIAL.DOC (6032, 1996-01-09)
video\decoder\spatscal.c (9428, 1996-01-08)
video\decoder\store.c (15001, 1996-01-09)
video\decoder\subspic.c (10630, 1996-01-09)
video\decoder\systems.c (4616, 1996-01-09)
video\decoder\test.m2v (6796, 1995-12-19)
video\decoder\TODO (2987, 1996-01-09)
video\decoder\verify.c (8639, 1996-01-03)
video\decoder (0, 2004-04-13)
video\doc\ARCHITECTURE (6708, 1995-07-15)
video\doc\mpeg2dec.doc (7718, 1995-07-15)
video\doc\mpeg2enc.doc (24606, 1995-07-15)
video\doc (0, 2004-04-13)
video\encoder\CHANGES (704, 1995-07-15)
video\encoder\config.h (1544, 1995-07-15)
video\encoder\conform.c (9605, 1995-07-15)
video\encoder\fdctref.c (2720, 1995-07-15)
video\encoder\global.h (11259, 1995-07-15)
video\encoder\idct.c (5808, 1995-07-15)
video\encoder\Makefile (2813, 1995-07-15)
... ...

mpeg2encode / mpeg2decode ========================= MPEG-2 Encoder / Decoder, Version 1.1, June 1994 MPEG Software Simulation Group (MPEG-L@netcom.com) Contents: 1. Overview 2. Introduction 3. Contacting the MPEG Software Simulation Group 4. Availability 5. Installation 6. Acknowledgements 7. History of the technical report 1. Overview =========== This directory contains our implementation of an ISO/IEC DIS 13818-2 codec. It converts uncompressed video frames into MPEG-1 and MPEG-2 video coded bitstream sequences, and vice versa. The files mpeg2enc.doc and mpeg2dec.doc in the doc/ directory contain further information about the codec. The doc directory also contains an FAQ file answering frequently asked questions about MPEG. A precompiled version of the programs for MSDOS (requires at least a '386) and a set of verification files are available separately. Subdirectories src/mpeg2enc and src/mpeg2dec contain the source code for the encoder and decoder, subdirectory par/ contains a couple of example encoder parameter files for 25 and 30 frames/sec MPEG-2 and MPEG-1 video. 2. Introduction =============== MPEG-2 Video is a generic method for compressed representation of video sequences using a common coding syntax defined in the document ISO/IEC 13818 Part 2 (CD: Nov. 1993, DIS: March 1994) by the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC), in collaboration with the International Telecommunications Union (ITU) as Recommendation H.262. The MPEG-2 concept is similar to MPEG-1, but includes extensions to cover a wider range of applications. The primary application targeted during the MPEG-2 definition process was the all-digital transmission of broadcast TV quality video at coded bitrates between 4 and 9 Mbit/sec. However, the MPEG-2 syntax has been found to be efficient for other applications such as those at higher bit rates and sample rates (e.g. HDTV). The most significant enhancement over MPEG-1 is the addition of syntax for efficient coding of interlaced video (e.g. 16x8 block size motion compensation, Dual Prime, et al). Several other more subtle enhancements (e.g. 10-bit DCT DC precision, non-linear quantization, VLC tables, improved mismatch control) are included which have a noticeable improvement on coding efficiency, even for progressive video. Other key features of MPEG-2 are the scalable extensions which permit the division of a continuous video signal into two or more coded bit streams representing the video at different resolutions, picture quality (i.e. SNR), or picture rates. The MPEG Software Simulation Group is currently developing MPEG software with the purpose of providing aid in understanding the various algorithms which comprise an encoder and decoder, and giving a sample implementation based on advanced encoding models. The MPEG-2 software project is an on-going development. Since the current version of the encoder already employs a reasonable (and the most popular) subset of the MPEG-2 signal coding toolkit, and there appears to be sufficient public interest, we have decided to make a public release of the code. The encoder can also be used for generating good quality constant bitrate MPEG-1 sequences and is (to our knowledge) the first publicly available encoder based on the relatively sophisticated TM5 coding model. 3. Contacting the MPEG Software Simulation Group ================================================ We welcome any project-specific questions, comments, suggestions, bug reports etc. They should be sent to the Internet E-mail address: MPEG-L@netcom.com which automatically forwards them to the authors. Additionally, if you wish to be added to the general discussion and annoucement list (mpeg-users@netcom.com), send mail to: listserv@netcom.com with the following line in the message body: subscribe mpeg-users [your E-mail address] 4. Availability =============== The most recent version of the codec source code is available by anonymous ftp from: ftp.netcom.com:/pub/cfogg/mpeg2 The Internet address of ftp.netcom.com is [192.100.81.1]. The directory contains the following files: README this file mpeg2codec_v1.1.tar.gz codec source code and documentation mpeg2codec_verify_v1.1.tar.gz verification archive mpeg2d11.zip MS-DOS executable archive mpeg2w11.zip Win32s executable archive tennis.m2v sample MPEG-2 video sequence (8 frames 704x576) tennis.par, tennis.stat.gz parameter file and statistics output for tennis.m2v You need gunzip (GNU zip/unzip) to uncompress the .gz archives. Alternatively, the files may be retrieved by sending E-mail to: ftp-request@netcom.com ... with the following line in the body of the message: SEND cfogg/mpeg2/mpeg2codec_v1.1.tar.gz You can retrieve the directory listings by sending the following command to ftp-request@netcom.com: DIR cfogg/mpeg2 General information can be retrieved with the command: HELP World Wide Web: A set of WWW pages describing the project and containing information about the latest versions and their availability will be announced soon. This will include a couple of sample MPEG-2 video bitstreams. 5. Installation =============== mpeg2decode and mpeg2encode have been compiled and tested on the following platforms: - SUN SPARCstation 10, SunOS 4.1.3, cc / gcc / acc - '386-PC, MSDOS 5.0, djgpp v1.11, gcc v2.5.7 The source code should compile without major modifications on other 32 bit systems using both K&R and ANSI C compilers. Systems with 16 bit 'int' variables or segmented memory models are not supported. Please report any modifications you had to apply in order to install the programs on your system to the address MPEG-L@netcom.com. The encoder and decoder are kept in separate sub-directories, src/mpeg2dec contains the decoder, while src/mpeg2enc contains the encoder sources. The following installation procedure applies to both the encoder and the decoder: Step 1: edit Makefile --------------------- You may have to set CC to your C compiler and CFLAGS to the flags required by the compiler. It is sufficient to set these variables in the top directory Makefile. They are propagated to the individual Makefiles of the encoder and decoder. Any other changes have to be applied to the individual Makefiles, however. You can compile the decoder with or without X11 output. Please follow the instructions in the top-level Makefile to activate X Window System support. If you use a C compiler which doesn't understand ANSI-C function prototypes add -DNON_ANSI_COMPILER to CFLAGS. Step 2: edit src/mpeg2dec/config.h ---------------------------------- In most cases, no modification should be required. If your C library doesn't accept "rb" / "wb" parameters in fopen() (required to disable LF <-> CR/LF conversion on MSDOS systems), change the #defines RB and WB to "r" and "w". Step 3: make ------------ Type 'make' from the top directory (mpeg2). On a PC with DJGPP installed you have to enter 'make pc' in the individual source directories to produce .exe files. Step 4: verification -------------------- If you have downloaded and unarchived the mpeg/verify directory, you can verify correct compilation of the codec by typing 'make test'. No differences should be reported. The only comparison which is allowed to fail is between test.m2v and new.m2v, caused by floating point accuracy dependencies in the forward DCT. 6. Acknowledgements =================== Authors of the current release are: Stefan Eckart (stefan@lis.e-technik.tu-muenchen.de) Chad Fogg (cfogg@netcom.com) Cheung Auyeung (auyeung@mot.com) Sorin Papuc (sop@compcore.com) Special thanks are due to J. Steurer, M. Oepen, IRT (Institut fuer Rundfunktechnik, Muenchen): for contributing motion estimation speed improvements (distance computation short-circuit in conjunction with spiral search, cf. dist1(), fullsearch()) Numerous users: for providing bug reports and Makefiles 7. History of Technical Report Project ====================================== The Technical Report, a document which primarily consists of a C source code program, was initiated by the MPEG committee to: - Provide an example of MPEG video syntax being intelligently employed to generate good quality video. - A reference tool for implementors - Aid in understanding the MPEG specification MPEG would like to especially thank Dr. Stefan Eckart for his contributions have greatly helped the MPEG-2 Technical Report project start onto a successful path towards the final 13818-5 document. MPEG lends a kind acknowledgement to Arian Koster (PTT) for initiating the MPEG-1 technical report project in Autumn 1992, and Leonardo Chiariglione (Convenor of MPEG) and Didier Le Gall (Chairman of MPEG Video) for support throughout both projects. Also many thanks to MPEG-1 project contributors Peter Au (Hughes Aircraft), Ron Burns (Hughes Aircraft), Stefan Eckart (Technical University of Munich), Chad Fogg (Cascade Design Automation / Xenon Microsystems), Tsuyoshi Hanamura (Waseda University), Kinya Oosa (Nippon Steel), Brian Quandt (Heuris Logic) and Hiroshi Watanabe (NTT). ---- End of Readme file

近期下载者：

相关文件：

评论：[我要评论] [举报此文件]

收藏者：