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文件名称:T-REC-G.711-200911-I!Amd2!SOFT-ZST-E

  • 所属分类：
    Voice Compress
  • 标签属性：
    [Windows] [Visual.Net] [源码]
  • 上传时间：
    2012-11-16
  • 文件大小：
    894.18kb
  • 已下载：
    0次
  • 提 供 者：
    c*****
  • 相关连接：
    无
  • 下载说明：
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修正介绍说明

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G.711使用64Kbps的带宽，可将14bits转换成8bits。目前G.711有两个编码方式，A-law以及Mu-law。-G.711 defines two main compression algorithms, the µ -law algorithm (used in North America & Japan) and A-law algorithm (used in Europe and the rest of the world). Both are logarithmic, but A-law was specifically designed to be simpler for a computer to process. The standard also defines a sequence of repeating code values which defines the power level of 0 dB.



The µ -law and A-law algorithms encode 14-bit and 13-bit signed linear PCM samples (respectively) to logarithmic 8-bit samples. Thus, the G.711 encoder will create a 64 kbit/s bitstream for a signal sampled at 8 kHz.[5]



G.711 μ-law tends to give more resolution to higher range signals while G.711 A-law provides more quantization levels at lower signal levels. When using μ-law G.711 in networks where suppression of the all 0 character signal is required, the character signal corresponding to negative input values between decision values numbers 127 and 128 should be 00000010 and the value at the decoder output is-
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下载文件列表

Software/G711_Appiii_Fix_v1.00_v1_LC/
Software/G711_Appiii_Fix_v1.00_v1_LC/G711Plus/
Software/G711_Appiii_Fix_v1.00_v1_LC/G711Plus/Decoder/
Software/G711_Appiii_Fix_v1.00_v1_LC/G711Plus/Decoder/Decoder.vcproj
Software/G711_Appiii_Fix_v1.00_v1_LC/G711Plus/Encoder/
Software/G711_Appiii_Fix_v1.00_v1_LC/G711Plus/Encoder/Encoder.vcproj
Software/G711_Appiii_Fix_v1.00_v1_LC/G711Plus/G711Plus.ncb
Software/G711_Appiii_Fix_v1.00_v1_LC/G711Plus/G711Plus.sln
Software/G711_Appiii_Fix_v1.00_v1_LC/G711Plus/G711Plus.suo
Software/G711_Appiii_Fix_v1.00_v1_LC/Makefile
Software/G711_Appiii_Fix_v1.00_v1_LC/makefile.cl
Software/G711_Appiii_Fix_v1.00_v1_LC/Readme-G.711-App-v1.00.txt
Software/G711_Appiii_Fix_v1.00_v1_LC/src/
Software/G711_Appiii_Fix_v1.00_v1_LC/src/basicOp_stl2005_v2.2/
Software/G711_Appiii_Fix_v1.00_v1_LC/src/basicOp_stl2005_v2.2/basop.rme
Software/G711_Appiii_Fix_v1.00_v1_LC/src/basicOp_stl2005_v2.2/basop32.c
Software/G711_Appiii_Fix_v1.00_v1_LC/src/basicOp_stl2005_v2.2/basop32.h
Software/G711_Appiii_Fix_v1.00_v1_LC/src/basicOp_stl2005_v2.2/control.c
Software/G711_Appiii_Fix_v1.00_v1_LC/src/basicOp_stl2005_v2.2/control.h
Software/G711_Appiii_Fix_v1.00_v1_LC/src/basicOp_stl2005_v2.2/count.c
Software/G711_Appiii_Fix_v1.00_v1_LC/src/basicOp_stl2005_v2.2/count.h
Software/G711_Appiii_Fix_v1.00_v1_LC/src/basicOp_stl2005_v2.2/enh1632.c
Software/G711_Appiii_Fix_v1.00_v1_LC/src/basicOp_stl2005_v2.2/enh1632.h
Software/G711_Appiii_Fix_v1.00_v1_LC/src/basicOp_stl2005_v2.2/enh40.c
Software/G711_Appiii_Fix_v1.00_v1_LC/src/basicOp_stl2005_v2.2/enh40.h
Software/G711_Appiii_Fix_v1.00_v1_LC/src/basicOp_stl2005_v2.2/Makefile
Software/G711_Appiii_Fix_v1.00_v1_LC/src/basicOp_stl2005_v2.2/makefile.cl
Software/G711_Appiii_Fix_v1.00_v1_LC/src/basicOp_stl2005_v2.2/move.h
Software/G711_Appiii_Fix_v1.00_v1_LC/src/basicOp_stl2005_v2.2/patch.h
Software/G711_Appiii_Fix_v1.00_v1_LC/src/basicOp_stl2005_v2.2/stl.h
Software/G711_Appiii_Fix_v1.00_v1_LC/src/basicOp_stl2005_v2.2/typedef.h
Software/G711_Appiii_Fix_v1.00_v1_LC/src/basicOp_stl2005_v2.2/typedefs.h
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/app1_postfilter/
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/app1_postfilter/post.c
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/app1_postfilter/post.h
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/app1_postfilter/post_anasyn.c
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/app1_postfilter/post_anasyn.h
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/app1_postfilter/post_const.h
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/app1_postfilter/post_gainfct.c
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/app1_postfilter/post_gainfct.h
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/app1_postfilter/post_rfft.c
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/app1_postfilter/post_rfft.h
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/app1_postfilter/table_post.c
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/g711App/
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/g711App/g711App.h
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/g711App/g711App_common.h
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/g711App/g711Appdec.c
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/g711App/g711Appenc.c
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/g711App/prehpf.c
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/g711App/prehpf.h
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/g711App/softbit.c
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/g711App/softbit.h
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/lower_band/
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/lower_band/autocorr_ns.c
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/lower_band/fec_lowband.c
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/lower_band/fec_lowband.h
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/lower_band/g711.h
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/lower_band/g711a.c
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/lower_band/g711mu.c
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/lower_band/lowband.h
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/lower_band/lowband_dec.c
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/lower_band/lowband_enc.c
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/lower_band/lpctool.c
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/lower_band/lpctool.h
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/lower_band/table_lowband.c
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/Makefile
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/makefile.cl
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/util/
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/util/dsputil.c
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/util/dsputil.h
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/util/errexit.c
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/util/errexit.h
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/util/mathtool.c
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/util/mathtool.h
Software/G711_Appiii_Fix_v1.00_v1_LC/src/mainlib/util/oper_32b.c
Software/G711_Appiii_Fix_v

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