ahe
所属分类：android开发
开发工具：Borland C++
文件大小：49KB
下载次数：0
上传日期：2018-09-22 03:24:03
上 传 者：
kgtpman
说明： gsm程序,语音编解码的实现,gsm-1 0-pl6,具体内容没有仔细研究
(Gsm program, the implementation of speech codec, gsm-1 0-pl6, the specific content is not carefully studied)
文件列表:
Yinc\config.h (1248, 1994-05-11)
Yinc\gsm.h (1607, 1994-12-31)
Yinc\private.h (7459, 1994-11-30)
Yinc\proto.h (1606, 1992-10-28)
tls\taste.h (355, 1992-10-28)
Yinc\toast.h (2094, 1994-11-30)
Yinc\unproto.h (471, 1992-10-28)
src\add.c (5549, 1994-12-31)
w2C3add-test\add_test.c (7010, 1994-05-11)
tls\bitter.c (1312, 1992-10-28)
tst\cod2lin.c (1870, 1992-10-28)
tst\cod2txt.c (1652, 1992-10-28)
src\code.c (2554, 1994-05-11)
src\debug.c (1543, 1994-05-11)
src\decode.c (1569, 1992-10-28)
src\gsm_create.c (964, 1994-05-11)
src\gsm_decode.c (3559, 1992-10-28)
src\gsm_destroy.c (568, 1994-11-30)
src\gsm_encode.c (4846, 1992-10-28)
src\gsm_explode.c (4246, 1992-10-28)
src\gsm_implode.c (5762, 1992-10-28)
src\gsm_option.c (749, 1992-10-28)
src\gsm_print.c (4930, 1992-10-28)
tst\gsm2cod.c (1612, 1992-10-28)
tst\lin2cod.c (1907, 1992-10-28)
tst\lin2txt.c (1730, 1992-10-28)
src\long_term.c (15244, 1994-05-11)
src\lpc.c (7088, 1994-12-31)
src\preprocess.c (2512, 1994-05-11)
src\rpe.c (11059, 1994-05-11)
src\short_term.c (10401, 1994-05-11)
tls\sweet.c (1366, 1992-10-28)
src\table.c (2146, 1992-10-28)
tls\taste.c (2433, 1992-10-28)
src\toast.c (17375, 1994-11-30)
src\toast_alaw.c (19429, 1992-10-28)
src\toast_audio.c (2682, 1994-11-30)
src\toast_lin.c (655, 1992-10-28)
src\toast_ulaw.c (44291, 1992-10-28)
... ...
/*
* Copyright 1992 by Jutta Degener and Carsten Bormann, Technische
* Universitaet Berlin. See the accompanying file "COPYRIGHT" for
* details. THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
*/
GSM 06.10 13 kbit/s RPE/LTP speech compression available
--------------------------------------------------------
The Communications and Operating Systems Research Group (KBS) at the
Technische Universitaet Berlin is currently working on a set of
UNIX-based tools for computer-mediated telecooperation that will be
made freely available.
As part of this effort we are publishing an implementation of the
European GSM 06.10 provisional standard for full-rate speech
transcoding, prI-ETS 300 036, which uses RPE/LTP (residual pulse
excitation/long term prediction) coding at 13 kbit/s.
GSM 06.10 compresses frames of 160 13-bit samples (8 kHz sampling
rate, i.e. a frame rate of 50 Hz) into 260 bits; for compatibility
with typical UNIX applications, our implementation turns frames of 160
16-bit linear samples into 33-byte frames (1650 Bytes/s).
The quality of the algorithm is good enough for reliable speaker
recognition; even music often survives transcoding in recognizable
form (given the bandwidth limitations of 8 kHz sampling rate).
The interfaces offered are a front end modelled after compress(1), and
a library API. Compression and decompression run faster than realtime
on most SPARCstations. The implementation has been verified against the
ETSI standard test patterns.
Jutta Degener (jutta@cs.tu-berlin.de)
Carsten Bormann (cabo@cs.tu-berlin.de)
Communications and Operating Systems Research Group, TU Berlin
Fax: +49.30.31425156, Phone: +49.30.31424315
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