| 전자부품 데이터시트 검색엔진 |
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STA015 데이터시트(PDF) 20 Page - STMicroelectronics |
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STA015 데이터시트(HTML) 20 Page - STMicroelectronics |
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20 / 44 page ![]() Bitrate_index indicates the bitrate (Kbit/sec) depending on the MPEG ID. bitrate index ID = 1 ID = 0 ’0000’ free free ’0001’ 32 8 ’0010’ 40 16 ’0011’ 48 24 ’0100’ 56 32 ’0101’ 64 40 ’0110’ 80 48 ’0111’ 96 56 ’1000’ 112 64 ’1001’ 128 80 ’1010’ 160 96 ’1011’ 192 112 ’1100’ 224 128 ’1101’ 256 144 ’1110’ 320 160 ’1111’ forbidden forbidden Sampling Frequency indicates the sampling frequency of the encoded audio signal (KHz) depending on the MPEG ID Sampling Frequency MPEG1 MPEG2 MPEG2.5 ’00’ 44.1 22.05 11.03 ’01’ 48 24 12 ’10’ 32 16 8 ’11’ reserved reserved reserved Padding bit if this bit equals ’1’, the frame contains an addi- tional slot to adjust the mean bitrate to the sam- pling frequency, otherwise this bit is set to ’0’. Private bit Bit for private use. This bit will not be used in the future by ISO/IEC. Mode Indicates the mode according to the following ta- ble. The joint stereo mode is intensity_stereo and/or ms_stereo. mode mode specified ’00’ stereo ’01’ joint stereo (intensity_stereo and/or ms_stereo) ’10’ dual_channel ’11’ single_channel (mono) Mode extension These bits are used in joint stereo mode. They in- dicates which type of joint stereo coding method is applied. The frequency ranges, over which the intensity_stereo and ms_stereo modes are ap- plied, are implicit in the algorithm. Copyright If this bit is equal to ’0’, there is no copyright on the bitstream, ’1’ means copyright protected. Original/Copy This bit equals ’0’ if the bitstream is a copy, ’1’ if it is original. Emphasis Indicates the type of de-emphasis that shall be used. emphasis emphasis specified ’00’ none ’01’ 50/15 microseconds ’10’ reserved ’11’ CCITT J,17 DLA Address: 0x46 (70) Type: R/W Software Reset: 0x00 Hardware Reset: 0x00 MSB LSB b7 b6 b5 b4 b3 b2 b1 b0 Description DLA7 DLA6 DLA5 DLA4 DLA3 DLA2 DLA1 DLA0 OUTPUT ATTENUATION 0000000 0 NO ATTENUATION 0000000 1 -1dB 0000001 0 -2dB ::: ::::: : 0110000 0 -96dB STA015-STA015B-STA015T 20/44 |
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