[M4IF Technotes] Re: Conformance BitStreams

Wed Jul 2 11:56:50 EDT 2003

Vinay M K wrote:
> Dear Mr. Ralph,
> After I login at:
> ftp://mpaudconf:[email protected]/
> when I browse to
> /guests/mpeg4audio/incoming/testSequences/mpeg4audio-conformance/referencesW
> av
> 
> My FTP client shows all the .wav files as directories.. and I'm unable to
> download any
> of them except for al18, al19 & ap01,02,03,04,05 streams. Where is the
> problem. Please help
> regards
> Vinay M K

Vinay,
the problem might be an incompatibility of your ftp client with our ftp server. 
I so fare recogniced this type of incompatibility only with the MS IE. Please 
try another ftp client or just use Mozilla.
Best regards,
Ralph
> 
> 
> ----- Original Message -----
> From: "Ralph Sperschneider" <sps   iis.fhg.de>
> To: "Apoorva Ankad" <Apoorva   soc-soft.com>
> Cc: <technotes   lists.m4if.org>
> Sent: Tuesday, July 01, 2023 11:11 PM
> Subject: [M4IF Technotes] Re: Confirmance BitStreams
> 
> 
> 
>>Apoorva Ankad wrote:
>>
>>
>>>Dear Mr.Ralph,
>>>
>>>I am testing my MPEG4 AAC LC decoder. The standard tells that we
>>>have the test sequences from ftp.research.att.com .But, in that FTP
>>>there are only .mp4 files and no corresponding .wav files. So I checked
>>>the FTP
>>>       ftp://[email protected]/mpeg4audio-conformance
>>>Here I got both .mp4 and the corresponding .wav files. I downloaded the
>>>Mp4 file al06_96.mp4 and its three corresponding Wave files
>>>al06_96_f00.wav, al06_96_f01.wav and al06_96_f02.wav. But, what I felt
>>>was, all the three .Wav files have a background noise. I used CoolEdit
>>>for opening and playing them. Can you kindly tell me, whether to use
>>>these files itself, as the references?
>>>
>>>Apoorva M. Ankad
>>>Scanned by SecureSynergy VirusScreen Service.
>>>For more information log on to : http://www.securesynergyonline.com or
> 
> http://www.securesynergy.com
> 
>>Dear Apoorva,
>>
>>I hereby confirm that the files on
>>ftp://[email protected]/mpeg4audio-conformance are the most recent
>>conformance test sequences (both compressed and uncompressed
> 
> representation).
> 
>>The files on ftp.research.att.com are outdated and shall not be used
> 
> anymore.
> 
>>The occurance of background noise or similar effects might be due to a
> 
> badly
> 
>>tuned encoder or to a noisy input signal. However, this is irrelavant
> 
> since it
> 
>>does not affect the decoder conformance testing.
>>
>>Best regards,
>>
>>Ralph
>>
>>--
>>Dipl.-Ing. Ralph Sperschneider  | Phone: +49 9131 776 344
>>FhG IIS                         | Fax:   +49 9131 776 398
>>Am Wolfsmantel 33               | mailto:sps   iis.fhg.de
>>D 91058 Erlangen                | http://www.iis.fhg.de/amm/
>>
>>_______________________________________________
>>Technotes mailing list
>>Technotes   lists.m4if.org
>>http://lists.m4if.org/mailman/listinfo/technotes
>>
>>
> 
> 
> 

-- 
Dipl.-Ing. Ralph Sperschneider  | Phone: +49 9131 776 344
FhG IIS                         | Fax:   +49 9131 776 398
Am Wolfsmantel 33               | mailto:sps   iis.fhg.de
D 91058 Erlangen                | http://www.iis.fhg.de/amm/