4.Формат заголовка mp3-файлов

Byte 0 Byte 1 Byte 2 Byte 3

+--------+--------+--------+--------+

|76543210|76543210|76543210|76543210|

+--------+--------+--------+--------+

+------- ---+-+-+ +---+-++ +-+-+++-

| | | | | | || | | ||+--- 00=Emphasis None

| | | | | | || | | || 01=Emphasis 50/15 microseconds

| | | | | | || | | || 10=Emphasis Dunno

| | | | | | || | | || 11=Emphasis CITT j.17

| | | | | | || | | ||

| | | | | | || | | |+---- 0=Original NO

| | | | | | || | | | 1=Original YES

| | | | | | || | | |

| | | | | | || | | +----- 0=Copyright NO

| | | | | | || | | 1=Copyright YES

| | | | | | || | |

| | | | | | || | +------- Смотри таблицу <<Mode extension>>

| | | | | | || |

| | | | | | || +--------- 00=Stereo

| | | | | | || 01=Joint stereo

| | | | | | || 10=Dual channel

| | | | | | || 11=Single Channel (Mono)

| | | | | | ||

| | | | | | |+----------- 0=Extension None

| | | | | | | 1=Extension Private

| | | | | | |

| | | | | | +------------ 0=Unused bits are filled (padding req)

| | | | | | 1=All bits in frame are used

| | | | | |

| | | | | +-------------- Смотри таблицу <<Sample Rate Index>>

| | | | |

| | | | +------------------ Смотри таблицу <<Bitrate>>

| | | |

| | | +-------------------- 0=Error Protection Bit CRC is ON

| | | 1=Error Protection Bit CRC is OFF

| | |

| | +---------------------- 00=Layer-?

| | 01=Layer-3

| | 10=Layer-2

| | 11=Layer-1

| |

| +------------------------ 00=MPEG-2.5 (44100 Hz)

| 01=MPEG-?

| 10=MPEG-2.0 (22050 Hz)

| 11=MPEG-1.0 (11025 Hz)

|

+------------------------------------ Sync Header, всегда 0xFFEx

4.1.Таблица sample rate

MPEG-1
00	44100
01	48100
10	32000
11	?????

MPEG-2
00	22050
01	24000
10	16000
11	?????

????? а Ошибка Stream Error

4.2.Таблица mode extension

Layer-1,2
00	4
01	8
10	12
11	16

Layer-3
00	0
01	4
10	8
11	16

4.3.Таблица bit rate (kBit/s)

	MPEG-1			MPEG-2
	38000	44100	48000	16000	22050	24000
0000	0	0	0	0	0	0
0001	32	32	32	32	8	8
0010	64	48	40	48	16	16
0011	96	56	48	56	24	24
0100	128	64	56	64	32	32
0101	160	80	64	80	40	40
0110	192	96	80	96	48	48
0111	224	112	96	112	56	56
1000	256	128	112	128	64	64
1001	288	160	128	144	80	80
1010	320	192	160	160	96	96
1011	352	224	192	176	112	112
1100	384	256	224	192	128	128
1101	416	320	156	224	144	144
1110	448	384	320	256	160	160
1111	???	???	???	???	???	???

Layer 2/3 FrameSize=144*bps/Sample_Frequency+PaddingBit

	Stereo	Mono
MPEG 1.0	32	17
MPEG 2.x	17	09