Newsgroups: comp.speech
Path: lyra.csx.cam.ac.uk!warwick!slxsys!pipex!howland.reston.ans.net!EU.net!sunic!erinews.ericsson.se!ericom!sirius!pm214
From: pm214@lu.erisoft.se (Peter Mustel)
Subject: Re: Anybody knows ILS-format?
Message-ID: <1994Sep1.054118.11500@lu.erisoft.se>
Keywords: Speech,format,ILS
Organization: Erisoft AB, Sweden
References: <33utf0$s19@brachio.zrz.TU-Berlin.DE> <1994Aug30.105811.6169@nntp.nta.no>
Date: Thu, 1 Sep 1994 05:41:18 GMT
Lines: 35

hlj@hal.nta.no (Harald Ljoen) writes:

>In article <33utf0$s19@brachio.zrz.TU-Berlin.DE>, tiloafej@w250zrz.zrz.tu-berlin.de (Tilo Schuerer) writes:
>>Hy,
>>
>>the German Telecom is seeling CD-ROM's with german speech on it.
>>That speech is stored in ILS-format and I just don't know how
>>to convert this to common formats. 
>>
>>Any hints are welcome!

>ILS files have a 512-byte header organized as 128 4-byte integers, followed by the data
>section, which normally contains 16-bits signed integers. For speech files, the interesting
>fields in the header are (indices start at 1, this is FORTRAN, you know):

>Index	Description

>58	starting A/D channel
>59	number of A/D channels
>60	= 50 for 8 bit mu-law log quantization (REC)
>61	sampling frequency exponent (base 10)
>62	sampling freqency mantissa
>63	= -32000 if sampled data (speech data**)

>-- 
>** Also sprach harald.ljoen@tf.tele.no **

To convert to common sample data, just throw away the first 512 bytes
and you will have a file of 16-bit integers which you maybe can use.

      _O/ .   ______________________________________________________________
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