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GSM -EFR

GSM Enhanced Full Rate (GSM-EFR) has improved speech quality in comparison with GSM Full Rate speech codec. Based on code excited linear predictive (ACELP) model this codec operates at 12.2 bit rate.

 OEM Provider

Cranes Varsity

 

Features

  • eXpress DSP (XDAIS) compliant
  • Functions are C-callable
  • Multiple channel capable
  • Encoder and decoder meet all GSM Enhanced Full Rate compliance and interoperability requirements

Availability

GSM-EFR is available on the Texas Instruments TMS320 C64x and C64x+ DSP family.

Specifications

Coding Rate: 12.2 kbps

Sampling Rate: 8 kHz

Delay: 20 msec

Resource Usage

 

Devices Supported

Function

Program Memory

Per Channel Data Memory

Scratch Memory

Peak Loading (MCPS)

C64x
(Code in ext mem)

Encode

96.81Kb

2.33Kb

6.01Kb

8.4

Decode

37.87Kb

1.24Kb

0.58Kb

2.1

C64x+
(Code in int mem)

Encode

96.81Kb

2.33Kb

6.01Kb

8.81

Decode

37.87Kb

1.24Kb

0.58Kb

1.43

C64x
(Code in ext mem)

Encode

127.24kb

2.33kb

6.01kb

17.51

Decode

58.72kb

1.24kb

0.58kb

4.1

C64x
(Code in int mem)

Encode

127.24kb

2.33kb

6.01kb

10.61

Decode

58.72kb

1.24kb

0.58kb

1.51

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.