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G.729AB 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.729AB compliance and interoperability requirements

Availability

G.729AB 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

59160

6252

1440

3400

5.73

Decoder

25936

6252

1144

2060

1.46

C64x+
(Code in int mem)

Encoder

59160

6252

1440

3400

4.67

Decoder

25936

6252

1144

2060

1.44

C64x
(Code in ext mem)

Encoder

72408

6256

1440

3400

16.10

Decoder

27376

6684

1144

2060

5.74

C64x
(Code in int mem)

Encoder

72408

6256

1440

3400

5.72

Decoder

27376

6684

1144

2060

1.65

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.