USBB13AP77016-XXX-B06 NEC Electronics, USBB13AP77016-XXX-B06 Datasheet - Page 27

• Manufacturer Part Number: USBB13AP77016-XXX-B06
• Description: DSP middleware(AMR voice CODEC)
• Manufacturer: NEC Electronics

2.2.11 amr_ehf_test function
2.2.12 amr_dhf_test function
The amr_ehf_test function checks whether the input speech signal is the homing frame of the encoder.
[Classification]
[Function name]
[Summary of function] Identifies the homing frame of the speech data.
[Format]
[Argument]
[Return value]
[Registers used]
[Hardware resources] Maximum stack level:
The amr_dhf_test function checks whether the input bit stream is the homing frame of the decoder.
[Classification]
[Function name]
[Summary of function] Identifies the homing frame of the bit stream data.
[Format]
[Argument]
[Return value]
[Registers used]
[Hardware resources] Maximum stack level:
Encoder homing frame test function
amr_ehf_test
call amr_ehf_test
R0, R1, DP4
Maximum loop stack level:
Maximum number of repetitions:
Maximum number of cycles:
Decoder homing frame test function
amr_dhf_test
call amr_dhf_test
R0, R1, R2, R3, R4, R5, R6, R7, DP0, DP1, DP2, DP4, DP5, DP6, DP7
Maximum loop stack level:
Maximum number of repetitions:
Maximum number of cycles:
Register
Register
Register
Register
Register
Type
Type
Type
Type
CHAPTER 2 LIBRARY SPECIFICATIONS
Return Value
Return Value
Argument
Argument
User’s Manual U15165EJ3V0UM
DP4
R0L
DP0
R6L
R0L
First address of speech buffer
Test result
First address of bit stream buffer
Decode mode (see Table 2-2 Operation Mode of Encoder/
Decoder, excluding MRDTX)
Test result
0: No homing frame
1: Homing frame
0: No homing frame
1: Homing frame
0
967
0
1858
0
1
2
1
Description
Description
Description
Description
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