USBB17AP77016-XXX-B11 NEC Electronics, USBB17AP77016-XXX-B11 Datasheet - Page 13

• Manufacturer Part Number: USBB17AP77016-XXX-B11
• Description: DSP middleware(WMA (Windows Media Audio)decoder)
• Manufacturer: NEC Electronics

1.3.3
for WMA Decode Processing.
The MIPS values required to perform WMA decoding in real time are shown in Table 1-4 MIPS Values Required
[Measurement conditions]
• Simulator: HSM77016
• Evaluation results: Measure the processing capacity when each WMA file is decoded to determine the typical
• Assign the values shown in Table 2-5 Recommended Output Buffer Size for the decode processing unit
• The MIPS values only indicate the processing capacity of the wmad_FileDecodeData and wmad_FileGetPCM
Caution The maximum MIPS value may be larger than the values shown in Table 1-4 depending on the
and maximum values.
(number of samples) and output buffer size.
functions used for decoding and wmad_FileCBGetData function; the processing capacity of other functions and
the interrupt handler, etc., is not included.
wmad_FileCBGetData function.
configuration.
Performance
Bit Rate
[kbps]
192
data.
It is recommended to implement measures such as outputting a silent sound for a section that
cannot perform decode processing in real time, on the system side.
22
22
32
Table 1-4. MIPS Values Required for WMA Decode Processing
Decoding Conditions
Sampling Frequency
[kHz]
22
32
32
48
Note that the processing capacity may differ depending on the system
CHAPTER 1 INTRODUCTION
User’s Manual U15683EJ1V0UM
Number of Channels
Use the file attached as a sample for the user-defined
2
2
2
2
Typical MIPS Value
[MIPS]
28
44
27
41
Processing Capacity
Maximum MIPS Value
[MIPS]
51
74
47
71
13