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G.729B Voice Codec
The
G.729 codec is one of the most popular voice compression algorithms used in VoIP
since it operates with relatively good quality at a relatively low bandwidth of 8 kbit/s.
OEM Provider
Cranes Varsity |
 |
Features
- eXpress DSP Compliant
- Functions are C-callable
- Multichannel capable
- Encoder and decoder meet all ITU-T G.729 compliance and
interoperability requirements
Availability
G.729B is available on the Texas Instruments TMS320™ DSP Family C64x and C64x+ platform DSP Generations.
Specifications
Bit Rate: 8 kbps
Sampling Rate: 8 kHz
Delay: 5 msec algorithmic delay, 10 msec framing delay.
Resource Usage
|
DSP Generation |
Function |
Program Memory |
Table Memory |
Per Channel
Data Memory |
Scratch Memory |
Peak
Loading (MCPS) |
C64x+
(Code in ext mem) |
Encoder |
63096 |
6312 |
1576 |
3272 |
9 |
Decoder |
30576 |
6588 |
960 |
1872 |
1.75 |
C64x+
(Code in
int mem) |
Encoder |
63096 |
6312 |
1576 |
3272 |
8.86 |
Decoder |
30576 |
6588 |
960 |
1872 |
1.73 |
C64x
(Code in ext mem) |
Encoder |
77624 |
6312 |
1576 |
3272 |
21.35 |
Decoder |
29072 |
6588 |
960 |
1872 |
4.92 |
C64x
(Code in
int mem) |
Encoder |
77624 |
6312 |
1576 |
3272 |
10.30 |
Decoder |
29072 |
6588 |
960 |
1872 |
2.27 |
Notes
1) For code in ext mem, L 2 cache must be enabled.
2) Peak MCPS measured on C64x+ cycle accurate simulator and C6416 cycle accurate simulator.
3) All Memory usage is given in units of byte.
