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-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.
