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參數(shù)資料
| 型號(hào)： | AP77016-B07 |
| 英文描述： | USAP77016-B07 MP3 Audio Decoder Middleware User＇s Manual | User＇s Manual[09/2002] |
| 中文描述： | USAP77016 - B07 MP3音頻解碼器中間件用戶手冊(cè)|用戶手冊(cè)[09/2002] |
| 文件頁數(shù)： | 11/47頁 |
| 文件大?。?/td> | 291K |
| 代理商： | AP77016-B07 |
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User’s Manual U15152EJ2V0UM
11
CHAPTER 1 OVERVIEW
1.1 Middleware
Middleware is the name given to a group of software that has been tuned so that it draws out the maximum
performance of the processor and enables processing that is conventionally performed by hardware to be performed
by software.
The concept of middleware was introduced with the development of a new high-speed processor, the DSP, in order
to facilitate operation of the environments integrated in the system.
By providing appropriate speech codec and image data compression/decompression-type middleware, NEC is
offering users the kind of technology essential in the realization of a multimedia system for the
μ
PD77016 Family, and
is continuing its promotion of system development.
μ
SAP77016-B08 is middleware that provides AAC-technology decoding functions.
1.2 AAC Audio Decoder
AAC is a form of audio coding for multiple channels (up to 64 channels) that achieves high quality and high
compression rates by excluding compatibility with MPEG-1 audio. The relevant standard is ISO/IEC 13818-7.
In this user’s manual, AAC is an abbreviation for Advanced Audio Coding.
μ
SAP77016-B08 complies with this AAC-technology decoding method. The compressed data is data that encodes
a digital signal converted to 16-bit linear PCM data after sampling an analog signal at frequencies shown in Table 1-1.
Note that
μ
SAP77016-B08 decodes and outputs at most two front channels.
Table 1-1. Sampling Frequencies
Frequency [Hz]
8000
11025
12000
16000
22050
24000
32000
44100
48000
64000
88200
96000
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| AP77016-B08 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:USAP77016-B08 AAC Audio Decoder Middleware | User＇s Manual[10/2002] |
| AP77016-B11 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:USAP77016-B11 User＇s Manual | User＇s Manual[01/2002] |
| AP77016-B17 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:USAP77016-B17 User＇s Manual | User＇s Manual[01/2003] |
| AP77016-B19 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:USAP77016-B19 User＇s Manual | User＇s Manual[03/2003] |
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