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Telephony DSP Software

These functions relate to the standard telephone network. Click on "asm code"# or "C code" of the desired function to view a data sheet (# shorthand for TMS320C5000 DSP assembler code).

*Function*	*Code type*	Processor MIPS1	*Processor Data Mem (kwords)2*	Processor Prog Mem1	*Features*	*Sample rate (kHz)*
Caller ID Encoder	asm code	0.41	4 + (5 + M/2)xN	0.13kwords	-	8.0/9.6
Caller ID Encoder	C code	0.7	(5 + M/2)xN	0.4kbytes	-	8.0/9.6
Caller ID Decoder	asm code	1.34	(26 + M/2)xN	0.31kwords	12dB SNR for 10-6 Error Rate	8.0/9.6
Caller ID Decoder	C code	20.8	(26 + M/2)xN	1.1kbytes	12dB SNR for 10-6 Error Rate	8.0/9.6
DTMF Transmittter	asm code	0.23	4 + 123xN	0.15kwords	-	8.0/9.6
DTMF Transmittter	C code	30.8	4 + 123xN	0.5kbytes	-	8.0/9.6
DTMF Receiver	asm code	0.61	20 + 27xN	0.5kwords	ITU/Mitel tests passed	8.0/9.6
DTMF Receiver	C code	1.3	4 + 27xN	1.4kbytes	ITU/Mitel tests passed	8.0/9.6
Exchange tone detector	asm code	0.64	22xN	0.16kwords	Programmable filter	8.0/9.6
R2 Transmitter	asm code	0.19	1 + 7xN	0.11kwords	-	8.0/9.6
R2 Receiver	asm code	0.40	20 + 20xN	0.30kwords	-	8.0/9.6
*Function*	*Code type*	Processor MIPS1	*Processor Data Mem (kwords)2*	Processor Prog Mem1	*Features*	*Sample rate (kHz)*

1 with asm code MIPS and ProgMem (in 16-bit words) values are from TMS320C54x DSP assembling
1 with C code MIPS and ProgMem (in 8-bit bytes) values are from TMS320C55x DSP compiling
1 MIPS at 8.0kHz sample rate
M(buffer) refers to user-set size of data queue in bytes
2 X + YxN means X words plus Y words for each of N channels
3 for 16-digit queue

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