×
Namespaces

Variants
Actions
(Difference between revisions)

Archived:Full duplex with PCM16 codec produces echo on Nokia N95 with AD-54 headset (Known Issue)

From Nokia Developer Wiki
Jump to: navigation, search
hamishwillee (Talk | contribs)
m (Hamishwillee - Bot fixing redirect link.(Moving links from forum.nokia.com TO developer.nokia.com))
hamishwillee (Talk | contribs)
m (Hamishwillee - Bot change of template (Template:KnowledgeBase) - now using Template:ArticleMetaData)
Line 7: Line 7:
 
__NOTOC__
 
__NOTOC__
 
__NOEDITSECTION__
 
__NOEDITSECTION__
{{KnowledgeBase
+
{{ArticleMetaData
 
|id=KIS001042
 
|id=KIS001042
 
|platform=S60 3rd Edition, FP1
 
|platform=S60 3rd Edition, FP1
Line 15: Line 15:
 
|creationdate=June 19, 2008
 
|creationdate=June 19, 2008
 
|keywords=
 
|keywords=
 +
 +
|sourcecode= <!-- Link to example source code (e.g. [[Media:The Code Example ZIP.zip]]) -->
 +
|installfile= <!-- Link to installation file (e.g. [[Media:The Installation File.sis]]) -->
 +
|sdk=<!-- SDK(s) built and tested against (e.g. [http://linktosdkdownload/ Nokia Qt SDK 1.1]) -->
 +
|devicecompatability=<!-- Compatible devices (e.g.: All* (must have GPS) ) -->
 +
|signing=<!-- Empty or one of Self-Signed, DevCert, Manufacturer -->
 +
|capabilities=<!-- Capabilities required (e.g. Location, NetworkServices.) -->
 +
|author=[[User:Technical writer 1]]
 
}}
 
}}
  

Revision as of 14:39, 24 June 2011

Template:KBKI


Article Metadata
Tested with
Devices(s): Nokia N95, Nokia N95 8GB
Compatibility
Platform(s): S60 3rd Edition, FP1
S60 3rd Edition FP1
Article
Created: User:Technical writer 1 (19 Jun 2008)
Last edited: hamishwillee (24 Jun 2011)

Description

Simultaneous audio playback and recording (full duplex) may result in echo and/or feedback loop when certain wired headsets are attached and audio is being streamed in uncompressed PCM16 format.

How to reproduce

The example application S60 Platform: Full-Duplex Audio Example supports four codecs: AMR, G.711, G.729, and iLBC.

With the following modifications, also support for PCM16 format can be added:

// Specify PCM16 fourCC as follows:
fourCC = TFourCC(' ', 'P', '1', '6');

// Sample rate:
conf.iRate = EMMFSampleRate16000Hz;
// Buffer size:
const TUint KBufferLength = 0x2000;

Running full-duplex audio with this configuration works fine on most devices, but produces echo on the Nokia N95 when used with the AD-54 headset.

Solution

No solution exists.

56 page views in the last 30 days.
×