[opus] Opus for ASR - update and questions

Jean-Marc Valin jmvalin at jmvalin.ca
Thu Dec 6 20:55:00 PST 2012


I think the simplest would be to have an option for providing a file
containing the loss pattern. What do you think?

	Jean-Marc

On 12-12-06 11:32 PM, Young, Milan wrote:
> Unfortunately, a uniform model is going to make the simulation behave better than it would in real-world busty conditions.  If anyone has alternate model suggestions, please let me know.  I need a good simulation and I'd be happy to donate code.
> 
> Thanks
> 
>> -----Original Message-----
>> From: opus-bounces at xiph.org [mailto:opus-bounces at xiph.org] On Behalf Of
>> Timothy B. Terriberry
>> Sent: Thursday, December 06, 2012 6:46 PM
>> To: opus at xiph.org
>> Subject: Re: [opus] Opus for ASR - update and questions
>>
>> Young, Milan wrote:
>>> One more follow-up question regarding the decoder's "packet-loss"
>> parameter.  What distribution model is being used to simulate packet loss?  Is
>> this a uniform model, or something that resembles the bursty nature of real
>> world conditions?
>>
>> The best answer here is to read the code (from opus_demo.c):
>>              lost = len[toggle]==0 || (packet_loss_perc>0 && rand()%100 <
>> packet_loss_perc);
>>
>> So, uniform.
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