| Description | Uses | Classes, Interfaces, Objects and Records | Functions and Procedures | Types | Constants | Variables |
G711 implementation based on ITU source code
1.0 First release
procedure alaw_compress(lseg: long; linbuf: pInt16Array; logbuf: pointer); |
procedure alaw_expand(lseg: long; logbuf: pointer; linbuf: pInt16Array); |
procedure ulaw_compress(lseg: long; linbuf: pInt16Array; logbuf: pointer); |
procedure ulaw_expand(lseg: long; logbuf: pointer; linbuf: pInt16Array); |
procedure alaw_compress(lseg: long; linbuf: pInt16Array; logbuf: pointer); |
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========================================================================== FUNCTION NAME: alaw_compress DESCRIPTION: ALaw encoding rule according ITU-T Rec. G.711. PROTOTYPE: void alaw_compress(long lseg, short *linbuf, short *logbuf) PARAMETERS: lseg: (In) number of samples linbuf: (In) buffer with linear samples (only 12 MSBits are taken into account) logbuf: (Out) buffer with compressed samples (8 bit right justified, without sign extension) RETURN VALUE: none. HISTORY: 10.Dec.91 1.0 Separated A-law compression function ========================================================================== |
procedure alaw_expand(lseg: long; logbuf: pointer; linbuf: pInt16Array); |
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========================================================================== FUNCTION NAME: alaw_expand DESCRIPTION: ALaw decoding rule according ITU-T Rec. G.711. PROTOTYPE: void alaw_expand(long lseg, short *logbuf, short *linbuf) PARAMETERS: lseg: (In) number of samples logbuf: (In) buffer with compressed samples (8 bit right justified, without sign extension) linbuf: (Out) buffer with linear samples (13 bits left justified) RETURN VALUE: none. HISTORY: 10.Dec.91 1.0 Separated A-law expansion function ============================================================================ |
procedure ulaw_compress(lseg: long; linbuf: pInt16Array; logbuf: pointer); |
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========================================================================== FUNCTION NAME: ulaw_compress DESCRIPTION: Mu law encoding rule according ITU-T Rec. G.711. PROTOTYPE: void ulaw_compress(long lseg, short *linbuf, short *logbuf) PARAMETERS: lseg: (In) number of samples linbuf: (In) buffer with linear samples (only 12 MSBits are taken into account) logbuf: (Out) buffer with compressed samples (8 bit right justified, without sign extension) RETURN VALUE: none. HISTORY: 10.Dec.91 1.0 Separated mu-law compression function ========================================================================== |
procedure ulaw_expand(lseg: long; logbuf: pointer; linbuf: pInt16Array); |
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========================================================================== FUNCTION NAME: ulaw_expand DESCRIPTION: Mu law decoding rule according ITU-T Rec. G.711. PROTOTYPE: void ulaw_expand(long lseg, short *logbuf, short *linbuf) PARAMETERS: lseg: (In) number of samples logbuf: (In) buffer with compressed samples (8 bit right justified, without sign extension) linbuf: (Out) buffer with linear samples (14 bits left justified) RETURN VALUE: none. HISTORY: 10.Dec.91 1.0 Separated mu law expansion function ============================================================================ |
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