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Header file ig726enc.h of TI sample G.726 Decoder / Encoder

Yu
Intellectual 400 points

Hi all,

I downloaded from the page of the TI G726 Encoder and Decoder c55xx, but there are questions.

http://software-dl.ti.com/dsps/dsps_public_sw/codecs/C55X_Speech/index_FDS.html
 G726 Encoder and Decoder, Version 2.00.00.012

Appendix B Table B-1 and Appendix A Table A-1 of g726_api_ref_xdais.doc
How to specify is unknown about CompandingLaw of No. 3 in.

the comments of ig726dec.h and ig726enc.h
   CONST_COMP_ALAW_8
   CONST_COMP_MULAW_8
   CONST_COMP_LINEAR_8 (no companding)
  
It is written above and can be used, but I do not know the value because there is no # define.

Regards.

  • 0
    Intellectual 890 points

    Hi,

    CompandingLaw has to be specified through the configuration file.

    You please refer the Usermanual. On page 7, it is explained about the configuration file.

    the companding law (1,2,3,4 for u-law, A-law, u-law to A-law, A-law to u-law respectively).

    The test application internally converts the above values to 1 (MU-Law) or 2 (A-Law) and passes to the codec.
    Also, refer the example configuration file (*.dat) file available in testvecs folder and the test application code (tstsrc\c55x\g726EncoderMain.c) for sample usage.


    Thanks,

    Venkat


  • 0 in reply to Venkateswara Rao R
    Intellectual 400 points

    Hi,

    Thank you for reply.

    Definition of CONST_COMP_LINEAR_8 is not to compandingLaw.
    That is, it is not compatible with linear PCM format.

    I think as described above.
    My opinion correct?

    Regards.