參數(shù)資料
型號(hào)： SAA2501
廠商： NXP Semiconductors N.V.
英文描述： Digital Audio Broadcast DAB decoder
中文描述： 數(shù)字音頻廣播民建聯(lián)的解碼器
文件頁(yè)數(shù)： 30/52頁(yè)
文件大?。?/td> 206K
代理商： SAA2501
January 1995
30
Philips Semiconductors
Preliminary specification
Digital Audio Broadcast (DAB) decoder
SAA2501
7.20.9
E
RROR REPORT ITEM
The validity of bit allocation plus scale factor select information and the result of the scale factor CRCs (the latter only
when decoding EU147 input data) may be read from the error report item. The error report item is only valid if status flag
INSYNC is set.
Table 26
Error report item; 1 byte (read-only)
Notes
1.
BALOK; bit allocation and scale factor select information validity indication:
a) BALOK = 0; bit allocation or scale factor select information are incorrect, or the CRC (if active) over header, bit
allocation and scale factor select information fail.
b) BALOK = 1; bit allocation or scale factor select information are correct, and the CRC (if active) over header, bit
allocation and scale factor select information passes.
DECFM; frame skipping/decoding indication:
a) DECFM = 0; the current input data frame is skipped, and the corresponding baseband audio output frame is
muted due to input data errors or inconsistencies. However, synchronization to the input data is maintained.
b) DECFM = 1; the current frame is decoded normally.
SFnOK is invalid when decoding ISO/MPEG input data. When decoding EU147 input data:
a) SFnOK = 0; then one or more scale factors have been concealed in sub-band block (n).
b) SFnOK = 1; no scale factors in sub-band block (n) are concealed (i.e. the error checking has passed).
Blocks 0 to 3 are explained in Table 27.
2.
3.
SUBSEQUENT
BYTES
7
6
5
4
3
2
1
0
Error report
BALOK
(1)
DECFM
(2)
undefined
undefined
SF3OK
(3)
SF2OK
(3)
SF1OK
(3)
SF0OK
(3)
Table 27
Content of blocks 0 to 3
7.20.10 A
UDIO SERVICE SYNCHRONIZED DATA ITEM
When decoding EU147 input data, the Audio Service
Synchronized Data (ASSD), which is contained in each
frame, may be read. The subsequent ASSD bytes are read
in reverse order with respect to the input bitstream; the first
ASSD item byte is the last byte in the input bitstream. The
ASSD item is only valid when the status flag INSYNC is
set.
BLOCK
SUB-BANDS
0
1
2
3
0 to 3
4 to 7
8 to 15
16 to 31
相關(guān)PDF資料
PDF描述
SAA2501H Digital Audio Broadcast DAB decoder
SAA2502 ISO/MPEG Audio Source Decoder
SAA2502H ISO/MPEG Audio Source Decoder
SAA2503 MPEG2 audio decoder(MPEG2 音頻譯碼器)
SAA2503HT MPEG2 audio decoder
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SAA2501H 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital Audio Broadcast DAB decoder
SAA2501HB-S 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Digital Audio Decoder & Support
SAA2502 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:ISO/MPEG Audio Source Decoder
SAA2502H 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:ISO/MPEG Audio Source Decoder
SAA2503 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:MPEG2 audio decoder
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