Hi Glen,
My hardware bottleneck is for low speed . I am using nRF52 which is a
CortexM4 microcontroller with 64MHz clock speed and 64 KB of RAM . The
problem is if I use 8KHz sampling rate the frame size is 20 ms for 160
samples ( 3200 kbps) . But conversion time to compress 20 ms frame is
around 60 ms if I want to use 3200kbps CODEC . So I am missing 3 frames for
each compression . So I am using 4 KHz sampling rate because 4KHz sampling
rate would give me 40ms frame for 160 samples .
kind regards
Anomadarshi
On Sun, Jun 12, 2016 at 2:54 PM, glen english <[email protected]> wrote:
> Nice one Jereon.
>
> Anomadarshi,
>
> where is your hardware bottleneck- why the sample rate limit- help us
> understand .
>
> I thought that if you had a hardware bit rate limit, then going for 8 kHz
> sampling and 8 bit samples would be the same information rate as 4 Khz
> sampling and 16 bit samples.
>
> As Jereon says, you will need to format to suit the buffers and structs.
>
>
>
> regards
>
>
> On 12/06/2016 10:43 PM, Anomadarshi Barua Shuvro wrote:
>
> Hi,
>
> Thank you very much...You guys are doing really fantastic jobs..
>
> kind regards
> Anomadarshi
>
> On Sun, Jun 12, 2016 at 2:23 PM, Jeroen Vreeken <[email protected]>
> wrote:
>
>> Hi Anomadarshi,
>>
>> On 06/12/2016 02:11 PM, Anomadarshi Barua Shuvro wrote:
>> > Hi Glen,
>> > Thank you very much for your reply . I have few confusions. If I would
>> > use 8bit resolution per sample , then I would need to change line 3 in
>> > the following piece of code , right ? If I would change line 3 to buf
>> > = (char*)malloc(nsam*sizeof(char)) , will it work ? I mean do I need
>> > to change anything inside of the codec ?
>> >
>> No, that won't work.
>> The codec expects a buffer of shorts. So even if you sample only bytes
>> you would still have to convert them to shorts.
>>
>> This is the prototype of the encode function:
>> void codec2_encode(struct CODEC2 *codec2_state, unsigned char * bits,
>> short speech_in[]);
>>
>> It has not changed by your change.
>>
>> Regards,
>> Jeroen
>>
>>
>>
>> ------------------------------------------------------------------------------
>> What NetFlow Analyzer can do for you? Monitors network bandwidth and
>> traffic
>> patterns at an interface-level. Reveals which users, apps, and protocols
>> are
>> consuming the most bandwidth. Provides multi-vendor support for NetFlow,
>> J-Flow, sFlow and other flows. Make informed decisions using capacity
>> planning reports.
>> https://ad.doubleclick.net/ddm/clk/305295220;132659582;e
>> _______________________________________________
>> Freetel-codec2 mailing list
>> [email protected]
>> https://lists.sourceforge.net/lists/listinfo/freetel-codec2
>>
>
>
>
> ------------------------------------------------------------------------------
> What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic
> patterns at an interface-level. Reveals which users, apps, and protocols are
> consuming the most bandwidth. Provides multi-vendor support for NetFlow,
> J-Flow, sFlow and other flows. Make informed decisions using capacity
> planning reports. https://ad.doubleclick.net/ddm/clk/305295220;132659582;e
>
>
>
> _______________________________________________
> Freetel-codec2 mailing
> [email protected]https://lists.sourceforge.net/lists/listinfo/freetel-codec2
>
>
>
>
> ------------------------------------------------------------------------------
> What NetFlow Analyzer can do for you? Monitors network bandwidth and
> traffic
> patterns at an interface-level. Reveals which users, apps, and protocols
> are
> consuming the most bandwidth. Provides multi-vendor support for NetFlow,
> J-Flow, sFlow and other flows. Make informed decisions using capacity
> planning reports. https://ad.doubleclick.net/ddm/clk/305295220;132659582;e
> _______________________________________________
> Freetel-codec2 mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/freetel-codec2
>
>
------------------------------------------------------------------------------
What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic
patterns at an interface-level. Reveals which users, apps, and protocols are
consuming the most bandwidth. Provides multi-vendor support for NetFlow,
J-Flow, sFlow and other flows. Make informed decisions using capacity
planning reports. https://ad.doubleclick.net/ddm/clk/305295220;132659582;e
_______________________________________________
Freetel-codec2 mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/freetel-codec2
