G.723 is an
ITU-T
The ITU Telecommunication Standardization Sector (ITU-T) is one of the three sectors (divisions or units) of the International Telecommunication Union (ITU). It is responsible for coordinating standards for telecommunications and Information Commu ...
standard speech
codec using extensions of
G.721 providing voice quality covering 300 Hz to 3400 Hz using
Adaptive Differential Pulse Code Modulation (ADPCM) to 24 and 40 kbit/s for
digital circuit multiplication equipment (DCME) applications. The standard G.723 is obsolete and has been superseded by
G.726
G.726 is an ITU-T ADPCM speech codec standard covering the transmission of voice at rates of 16, 24, 32, and 40 kbit/s. It was introduced to supersede both G.721, which covered ADPCM at 32 kbit/s, and G.723, which described ADPCM for ...
.
Note that this is a completely different codec from
G.723.1
G.723.1 is an audio codec for voice that compresses voice audio in frames. An algorithmic look-ahead of duration means that total algorithmic delay is . Its official name is ''Dual rate speech coder for multimedia communications transmitting at ...
.
See also
*
List of codecs
The following is a list of compression formats and related codecs.
Audio compression formats
Non-compression
* Linear pulse-code modulation (LPCM, generally only described as PCM) is the format for uncompressed audio in media files and it is al ...
* G.723
ithdrawn– Extensions of Recommendation G.721 adaptive differential pulse code modulation to 24 and 40 kbit/s for digital circuit multiplication equipment application. The content of the 1988 edition of ITU-T G.723 is now covered by ITU-T
G.726
G.726 is an ITU-T ADPCM speech codec standard covering the transmission of voice at rates of 16, 24, 32, and 40 kbit/s. It was introduced to supersede both G.721, which covered ADPCM at 32 kbit/s, and G.723, which described ADPCM for ...
.
*
G.723.1
G.723.1 is an audio codec for voice that compresses voice audio in frames. An algorithmic look-ahead of duration means that total algorithmic delay is . Its official name is ''Dual rate speech coder for multimedia communications transmitting at ...
– Dual rate speech coder for multimedia communications transmitting at 5.3 and 6.3 kbit/s
*
G.726
G.726 is an ITU-T ADPCM speech codec standard covering the transmission of voice at rates of 16, 24, 32, and 40 kbit/s. It was introduced to supersede both G.721, which covered ADPCM at 32 kbit/s, and G.723, which described ADPCM for ...
– 40, 32, 24, 16 kbit/s Adaptive Differential Pulse Code Modulation (ADPCM). Corresponding ANSI-C code is available in the G.726 module of the ITU-T
G.191 Software Tools Library.
External links
ITU-T page of G.723
References
{{reflist
Audio codecs
Speech codecs
ITU-T recommendations
ITU-T G Series Recommendations