MAS3549F datasheet(42/92 Pages) MICRONAS

42 / 92 page

MAS 35x9F

DATA SHEET

June 30, 2004; 6251-505-1DS

Micronas

D0:FD2

(continued)

MPEG Header Information, continued

bit[11:10]

Sampling frequencies in Hz

MPEG1

MPEG2

MPEG2.5

44100

22050

11025

48000

24000

12000

32000

16000

8000

reserved

bit[9]

Padding Bit

bit[8]

reserved

bit[7:6]

Mode

stereo

joint_stereo (intensity stereo / m/s stereo)

dual channel

single channel

bit[5:4]

Mode extension (applies to joint stereo only)

intensity stereo

m/s stereo

off

bit[3]

0/1

not copyright protected/copyright protected

bit[2]

Copy/Original Bit

0/1

bitstream is a copy/bitstream is an original

bit[1:0]

Emphasis, indicates the type of emphasis

none

50/15

µs

reserved

CCITT J.17

This memory cell contains the 16 LSBs of the MPEG header. It will be set

directly after synchronizing to the bit stream.

Note that for AAC four bits are needed to define the sampling frequency while

for Layer2/Layer3 two bits are sufficient. This leads to an inconsistency in the

format of bits 13...10.

MPEGStatus2

D0:FD3

MPEG CRC Error Counter

The counter will be increased by each CRC error detected in the MPEG bis-

stream. It will not be reset when losing the synchronization.

CRCErrorCount

D0:FD4

Number of Bits in Ancillary Data

Number of valid ancillary bits in the current MPEG frame.

NumberOfAncillary-

Bits

D0:FD5

...

D0:FF1

Ancillary Data

(see Section 3.3.6. on page 43).

AncillaryData

Table 3–11: D0 status memory cells, continued

Memory

Address

Function

Name

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