📄 bitstrea.txt
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/*
ITU-T G.729 Annex I - Reference C code for fixed point
implementation of G.729 Annex I
Version 1.1 of October 1999
*/
TITLE
-----
This file describes the G.729 Annex I bitstream format.
BITSTREAM FORMAT
----------------
For rate 6.4 kbit/s, the bitstreamfile contains sixty-six 16-bit words
for each 10 ms speech frame.
There, the first word is the syncword SYNC_WORD and the second word is
the framesize contains the value 64 (66 less 2).
The next 64 words contain the following parameters:
001 LPC1- MA predictor switch
002 LPC1- 1st codebook 7 bit
003 LPC1-
004 LPC1-
005 LPC1-
006 LPC1-
007 LPC1-
008 LPC1-
009 LPC2- 2nd codebook low 5 bit
010 LPC2-
011 LPC2-
012 LPC2-
013 LPC2-
014 LPC2- 2nd codebook high 5 bit
015 LPC2-
016 LPC2-
017 LPC2-
018 LPC2-
019 M_1 pitch period 8 bit
020 M_1
021 M_1
022 M_1
023 M_1
024 M_1
025 M_1
026 M_1
027 CB1_0 codebook: one pulse in track 1 4 bits
028 CB1_0
029 CB1_0
030 CB1_0
031 CB1_1 codebook: two pulses in track 2 5 bit
032 CB1_1
033 CB1_1
034 CB1_1
035 CB1_1
036 CB1_S codebook: sign 2 bits
037 CB1_S
038 G_1 pitch and codebook gains 6 bits
039 G_1
040 G_1
041 G_1
042 G_1
043 G_1
044 M_2 pitch period (relative) 5 bit
045 M_2
046 M_2
047 M_2
048 CB2_0 codebook: one pulse in track 1 4 bits
049 CB2_0
050 CB2_0
051 CB2_0
052 CB2_1 codebook: two pulses in track 2 5 bit
053 CB2_1
054 CB2_1
055 CB2_1
056 CB2_1
057 CB2_S codebook: sign 2 bits
058 CB2_S
059 G_2 pitch and codebook gains 6 bits
060 G_2
061 G_2
062 G_2
063 G_2
064 G_2
For the rate 11.8 kbit/s, the bitstreamfile contains one-hundred and twenty 16-bit words for each 10 ms speech frame.
The first word is the syncword SYNC_WORD and the second word is the
framesize contains the value 118 (120 less 2).
The next 118 words contain the following parameters:
001 mode - Backward /forward switch,
= BIT_0 for forward mode
= BIT_1 for backward mode
002 parity bit for mode
In forward mode, the next 116 words are:
003 LPC1- MA predictor switch
004 LPC1- 1st codebook 7 bit
005 LPC1-
006 LPC1-
007 LPC1-
008 LPC1-
009 LPC1-
010 LPC1-
011 LPC2- 2nd codebook low 5 bit
012 LPC2-
013 LPC2-
014 LPC2-
015 LPC2-
016 LPC2- 2nd codebook high 5 bit
017 LPC2-
018 LPC2-
019 LPC2-
020 LPC2-
021 M_1 pitch period 8 bit
022 M_1
023 M_1
024 M_1
025 M_1
026 M_1
027 M_1
028 M_1
029 parity check on 1st period 1 bit
030 CB1_1_0 codebook: two pulses in track 0 7 bits
031 CB1_1_0
032 CB1_1_0
033 CB1_1_0
034 CB1_1_0
035 CB1_1_0
036 CB1_1_0
037 CB1_1_1 codebook: two pulses in track 1 7 bit
038 CB1_1_1
039 CB1_1_1
040 CB1_1_1
041 CB1_1_1
042 CB1_1_1
043 CB1_1_1
044 CB1_1_2 codebook: two pulses in track 2 7 bit
045 CB1_1_2
046 CB1_1_2
047 CB1_1_2
048 CB1_1_2
049 CB1_1_2
050 CB1_1_2
051 CB1_1_3 codebook: two pulses in track 3 7 bits
052 CB1_1_3
053 CB1_1_3
054 CB1_1_3
055 CB1_1_3
056 CB1_1_3
057 CB1_1_3
058 CB1_1_4 codebook: two pulses in track 4 7 bits
059 CB1_1_4
060 CB1_1_4
061 CB1_1_4
062 CB1_1_4
063 CB1_1_4
064 CB1_1_4
065 G_1 pitch and codebook gains 3 bit stage 1
066 G_1
067 G_1
068 G_1 pitch and codebook gains 4 bit stage 2
069 G_1
070 G_1
071 G_1
072 M_2 pitch period (relative) 5 bit
073 M_2
074 M_2
075 M_2
076 M_2
077 CB1_2_0 codebook: two pulses in track 0 7 bits
078 CB1_2_0
079 CB1_2_0
080 CB1_2_0
081 CB1_2_0
082 CB1_2_0
083 CB1_2_0
084 CB1_2_1 codebook: two pulses in track 1 7 bit
085 CB1_2_1
086 CB1_2_1
087 CB1_2_1
088 CB1_2_1
089 CB1_2_1
090 CB1_2_1
091 CB1_2_2 codebook: two pulses in track 2 7 bit
092 CB1_2_2
093 CB1_2_2
094 CB1_2_2
095 CB1_2_2
096 CB1_2_2
097 CB1_2_2
098 CB1_2_3 codebook: two pulses in track 3 7 bits
099 CB1_2_3
100 CB1_2_3
101 CB1_2_3
102 CB1_2_3
103 CB1_2_3
104 CB1_2_3
105 CB1_2_4 codebook: two pulses in track 4 7 bits
106 CB1_2_4
107 CB1_2_4
108 CB1_2_4
109 CB1_2_4
110 CB1_2_4
111 CB1_2_4
112 G_2 pitch and codebook gains 3 bit stage 1
113 G_2
114 G_2
115 G_2 pitch and codebook gains 4 bit stage 2
116 G_2
117 G_2
118 G_2
Alternatively, when in backward mode, the next 116 words are:
003 M_1 pitch period 8 bit
004 M_1
005 M_1
006 M_1
007 M_1
008 M_1
009 M_1
010 M_1
011 parity check on 1st period 1 bit
012 CB2_1_0 codebook: track index + pulses 1, 6, and 11 13 bits
013 CB2_1_0
014 CB2_1_0
015 CB2_1_0
016 CB2_1_0
017 CB2_1_0
018 CB2_1_0
019 CB2_1_0
020 CB2_1_0
021 CB2_1_0
022 CB2_1_0
023 CB2_1_0
024 CB2_1_0
025 CB2_1_1 codebook: pulses 2, 7, and 12 10 bit
026 CB2_1_1
027 CB2_1_1
028 CB2_1_1
029 CB2_1_1
030 CB2_1_1
031 CB2_1_1
032 CB2_1_1
033 CB2_1_1
034 CB2_1_1
035 CB2_1_2 codebook: pulses 3 and 8 7 bit
036 CB2_1_2
037 CB2_1_2
038 CB2_1_2
039 CB2_1_2
040 CB2_1_2
041 CB2_1_2
042 CB2_1_3 codebook: pulses 4 and 9 7 bits
043 CB2_1_3
044 CB2_1_3
045 CB2_1_3
046 CB2_1_3
047 CB2_1_3
048 CB2_1_3
049 CB2_1_4 codebook: pulses 5 and 10 7 bits
050 CB2_1_4
051 CB2_1_4
052 CB2_1_4
053 CB2_1_4
054 CB2_1_4
055 CB2_1_4
056 G_1 pitch and codebook gains 3 bit stage 1
057 G_1
058 G_1
059 G_1 pitch and codebook gains 4 bit stage 2
060 G_1
061 G_1
062 G_1
063 M_2 pitch period (relative) 5 bit
064 M_2
065 M_2
066 M_2
067 M_2
068 CB2_2_0 codebook: track index + pulses 1, 6, and 11 13 bits
069 CB2_2_0
070 CB2_2_0
071 CB2_2_0
072 CB2_2_0
073 CB2_2_0
074 CB2_2_0
075 CB2_2_0
076 CB2_2_0
077 CB2_2_0
078 CB2_2_0
079 CB2_2_0
080 CB2_2_0
081 CB2_2_1 codebook: pulses 2, 7, and 12 10 bit
082 CB2_2_1
083 CB2_2_1
084 CB2_2_1
085 CB2_2_1
086 CB2_2_1
087 CB2_2_1
088 CB2_2_1
089 CB2_2_1
090 CB2_2_1
091 CB2_2_2 codebook: pulses 3 and 8 7 bit
092 CB2_2_2
093 CB2_2_2
094 CB2_2_2
095 CB2_2_2
096 CB2_2_2
097 CB2_2_2
098 CB2_2_3 codebook: pulses 4 and 9 7 bits
099 CB2_2_3
100 CB2_2_3
101 CB2_2_3
102 CB2_2_3
103 CB2_2_3
104 CB2_2_3
105 CB2_2_4 codebook: pulses 5 and 10 7 bits
106 CB2_2_4
107 CB2_2_4
108 CB2_2_4
109 CB2_2_4
110 CB2_2_4
111 CB2_2_4
112 G_2 pitch and codebook gains 3 bit stage 1
113 G_2
114 G_2
115 G_2 pitch and codebook gains 4 bit stage 2
116 G_2
117 G_2
118 G_2
For SID frame, the bitstreamfile contains 17 (or 18) 16-bit words for
each 10 ms speech frame.
The first word is the syncword SYNC_WORD and the second word is the
framesize which will contain either the value 15 or the value 16
[15=17-2;16=18-2].
The next 15 (or 16) words contain the following parameters:
001 LPC1- SID MA predictor switch
002 LPC1- SID Lsp : 1st stage 5 bit
003 LPC1-
004 LPC1-
005 LPC1-
006 LPC1-
007 LPC2- SID Lsp : 2nd stage 4 bit
008 LPC2-
009 LPC2-
010 LPC2-
011 GAIN- SID gain : 5 bit
012 GAIN-
013 GAIN-
014 GAIN-
015 GAIN-
(016 BIT_0)
-- [END] --
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