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dcodcbi.f
Package: celp_3.2a.tar.gz [view]
Upload User: szhypcb168
Upload Date: 2007-01-06
Package Size: 2187k
Code Size: 2k
Category:
Voice Compress
Development Platform:
Unix_Linux
- c==========================================================================
- c
- c ROUTINE
- c dcodcbi.f
- c
- c FUNCTION
- c Decodes all code book indicies for a frame
- c
- c
- c SYNOPSIS
- c subroutine dcodcbi(cbbits,bitsum1,bitsum2,nn,cbi)
- c
- c formal
- c
- c data I/O
- c name type type function
- c -------------------------------------------------------------------
- c cbbits int i number of bits for quantization
- c bitsum1 int i number of bits for odd subframes
- c bitsum2 int i number of bits for even subframes
- c bitpointer int i/o number of bits used
- c nn int i number of subframes/frame
- c stream int*2 i bit stream
- c streambits int i number of bits in stream
- c cbi int o vector of code book indicies
- c
- c==========================================================================
- c
- c DESCRIPTION
- c
- c
- c==========================================================================
- c
- c REFERENCES
- c
- c
- c**************************************************************************
- c
- subroutine dcodcbi(cbbits,bitsum1,bitsum2,bitpointer,nn,stream,
- & streambits,cbi)
- implicit undefined(a-z)
- c
- integer cbbits,bitsum1,bitsum2,bitpointer,nn,streambits
- integer*2 stream(streambits)
- integer cbi(nn),i,pointer
- c
- pointer=bitpointer
- do 10 i=1,nn
- call unpack(stream,cbbits,streambits,cbi(i),pointer)
- cbi(i)=cbi(i)+1
- if (i.eq.1 .or. i.eq.3 .or. i.eq.5) then
- pointer=pointer+bitsum2-cbbits
- else if (i.eq.2 .or. i.eq.4 .or. i.eq.6) then
- pointer=pointer+bitsum1-cbbits
- else
- print *,' dcodcbi: Error in decoding code book index'
- end if
- 10 continue
- bitpointer=bitpointer+cbbits
- return
- end