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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.