mpeg2.zip_mpeg2

mpeg2decode

===========

MPEG-2 Video Decoder, Version 1.1, June 1994

MPEG Software Simulation Group

([email protected])

The program mpeg2decode is our implementation of an ISO/IEC DIS 13818-2

decoder. It converts MPEG-1 and MPEG-2 video bitstreams into uncompressed

video.

Features

at all defined levels

+ decodes MPEG-1 (ISO/IEC IS 11172-2) video bitstreams (except D-picture

sequences)

+ several output formats: separate and interleaved Y,U,V component,

Truevision TGA, PBMPLUS PPM, X11 display

+ 8 bit ordered dither and interlaced to progressive scan conversion

for X11 display

+ optional output of detailed decoding information

+ robustness against stream syntax errors

+ fast IEEE 1180-1990 compliant integer arithmetic inverse DCT

- error concealment

- repeat_field_first and other mostly display process oriented features

Introduction

============

mpeg2decode takes one or more ISO/IEC DIS 13818-2 [1] MPEG-2 video

bitstreams

and converts them to uncompressed video. Since MPEG-2 is (by definition)

forward compatible with MPEG-1, mpeg2decode also decodes MPEG-1 sequences

(ISO/IEC IS 11172-2 [2]).

The decoder is not optimized for speed, although some parts (e.g. variable

length decoding, inverse DCT) are based on relatively fast algorithms. The

emphasis was on correct implementation of the standard and simple

structure

of the program. Its main purpose is to demonstrate a sample implementation

of

under

development. However, we considered the current version to be complete

enough to justify a public release.

The decoder has been extensively tested on bitstreams produced by a

variety

of encoders from the MPEG research community to ascertain validity of the

implementation. Of course we can't guarantee complete compliance with the

standard.

Usage

=====

mpeg2decode {options} input.m2v {upper.m2v} {outfile}

Options:

Instructs mpeg2decode to generate informative ouput about the sequence

output.

- on output format (0: YUV, 1: SIF, 2: TGA, 3:PPM, 4:X11, 5:X11 HiQ)