This packet is a IS-95 baseband simulation for 1 data channel of 9.6 KBps rate.
The simulation is written for static channel and AWGN noise. The packet include:
1) Packet Builder (Viterbi Encoding, Interleaver, PN generation)
2) Modulator (RRC filter)
3) Demodulator (Matched Filter, RAKE receiver)
4) Receiver (HD or SD) (Deinterleaver, Viterbi DeCoder).
ITU-T G.723.1 Speech Coder: Matlab implementation
This package implements the speech coder and DeCoder. Full documentation
is in the PDF file included with the package. The test folder has test
programs for the coder and DeCoder (for Windows).
vhdl編寫，8b—10b 編解碼器設(shè)計(jì)
Encoder:
8b/10b Encoder (file: 8b10b_enc.vhd)
Synchronous clocked inputs (latched on each clock rising edge)
8-bit parallel unencoded data input
KI input selects data or control encoding
Asynchronous active high reset initializes all logic
Encoded data output
10-bit parallel encoded output valid 1 clock later
DeCoder:
8b/10b DeCoder (file: 8b10b_dec.vhd)
Synchronous clocked inputs (latched on each clock rising edge)
10-bit parallel encoded data input
Asynchronous active high reset initializes all logic
Decoded data, disparity and KO outputs
8-bit parallel unencoded output valid 1 clock later
This LDPC software is intended as an introduction to LDPC codes computer based simulation. The pseudo-random irregular low density parity check matrix is based on Radford M. Neal’s programs collection, which can be found in [1]. While Neal’s collection is well documented, in my opinion, C source codes are still overwhelming, especially if you are not knowledgeable in C language. My software is written for MATLAB, which is more readable than C. You may also want to refer to another MATLAB based LDPC source codes in [2], which has different flavor of code-writing style (in fact Arun has error in his log-likelihood DeCoder).
ISO mp3 sources (distribution 10)
Layer 1/2/3, C Source, 512 k
Sources of the Mpeg 1,2 layer 1,2,3 audio encoder and DeCoder distributed by the ISO group in charge of the MPEG.
Library and command line program for Huffman encoding and decoding both files and chunks of memory. The encoder is a 2 pass encoder. The first pass scans the data and builds the Huffman tree. The second pass encodes the data. The DeCoder is one pa
This LDPC software is intended as an introduction to LDPC codes computer based simulation. The pseudo-random irregular low density parity check matrix is based on Radford M. Neal’s programs collection, which can be found in [1]. While Neal’s collection is well documented, in my opinion, C source codes are still overwhelming, especially if you are not knowledgeable in C language. My software is written for MATLAB, which is more readable than C. You may also want to refer to another MATLAB based LDPC source codes in [2], which has different flavor of code-writing style (in fact Arun has error in his log-likelihood DeCoder).
The files in this directory comprise ANSI-C language reference implementations
of the CCITT (International Telegraph and Telephone Consultative Committee)
G.711, G.721 and G.723 voice compressions. They have been tested on Sun
SPARCstations and passed 82 out of 84 test vectors published by CCITT
(Dec. 20, 1988) for G.721 and G.723. [The two remaining test vectors,
which the G.721 DeCoder implementation for u-law samples did not pass,
may be in error because they are identical to two other vectors for G.723_40.]
UIT - Secteur de la normalisation des télécommunications
ITU - Telecommunication Standardization Sector
UIT - Sector de Normalización de las Telecomunicaciones
Study Period 1997-2000
Commission d études Study Group Comisión de Estudio 16 Contribution tardive Delayed Contribution Contribución tardía D.xxx
Geneva, 7-18 February 2000
Texte disponible seulement en Text available only in Texto disponible solamente en E
Question(s): Q.15/SG16
SOURCE*: Nokia Inc. / Nokia Research Center
6000 Connection Drive
Irving, Texas 75039
USA
Tel : +12147976155
Fax : +19728944589
e-mail : marta.karczewicz@nokia.com
TITLE: MVC DeCoder Description
H.264/AVC, the result of the collaboration between the ISO/IEC
Moving Picture Experts Group and the ITU-T Video Coding
Experts Group, is the latest standard for video coding. The goals
of this standardization effort were enhanced compression efficiency,
network friendly video representation for interactive
(video telephony) and non-interactive applications (broadcast,
streaming, storage, video on demand). H.264/AVC provides
gains in compression efficiency of up to 50％ over a wide range
of bit rates and video resolutions compared to previous standards.
Compared to previous standards, the DeCoder complexity
is about four times that of MPEG-2 and two times that of
MPEG-4 Visual Simple Profile. This paper provides an overview
of the new tools, features and complexity of H.264/AVC.
