RTP Buffering - Frame Based Buffering - Revision history

StefanG: /* Deliberate Delays */

2013-04-10T13:27:14Z

Deliberate Delays

← Older revision		Revision as of 13:27, 10 April 2013
Line 287:		Line 287:

	An artificial delay can be introduced by configuring the devices to different delay values. E.g. 100ms, 120ms, 140ms, 160ms, etc.		An artificial delay can be introduced by configuring the devices to different delay values. E.g. 100ms, 120ms, 140ms, 160ms, etc.

			Back to [[Main_Page#Software_Topics]]

Brain: corrected swapped PCM 44.1 kHz mono and 44.1kHz stereo labels

2011-10-18T09:21:40Z

corrected swapped PCM 44.1 kHz mono and 44.1kHz stereo labels

← Older revision		Revision as of 09:21, 18 October 2011
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	\| 237ms		\| 237ms
	\|-		\|-
	\| PCM 44.1kHz ~~stereo~~		\| PCM 44.1kHz mono
	\| 31ms		\| 31ms
	\| 97ms		\| 97ms
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	\| 172ms		\| 172ms
	\|-		\|-
	\| PCM 44.1kHz ~~mono~~		\| PCM 44.1kHz stereo
	\| 16ms		\| 16ms
	\| 72ms		\| 72ms

Brain: corrected swapped 44.1 kHz mono and 44.1kHz stereo labels

2011-10-18T09:21:08Z

corrected swapped 44.1 kHz mono and 44.1kHz stereo labels

← Older revision		Revision as of 09:21, 18 October 2011
Line 73:		Line 73:
	\| 152ms		\| 152ms
	\|-		\|-
	\| PCM 44.1kHz ~~stereo~~		\| PCM 44.1kHz mono
	\| 110ms		\| 110ms
	\|-		\|-
	\| PCM 44.1kHz ~~mono~~		\| PCM 44.1kHz stereo
	\| 79ms		\| 79ms
	\|-		\|-

Brain: /* Recommended Settings */

2010-06-24T09:51:57Z

Recommended Settings

← Older revision		Revision as of 09:51, 24 June 2010
Line 39:		Line 39:

	=== Recommended Settings ===		=== Recommended Settings ===
	The following table lists recommended delay values for various audio formats:		The following table lists recommended delay values for various audio formats. The value includes 2-frame jitter and is independent on hardware/software.

	{\| border="1" cellpadding="3" cellspacing="0"		{\| border="1" cellpadding="3" cellspacing="0"
Line 50:		Line 50:
	\|-		\|-
	\| uLaw/ALaw 8kHz mono		\| uLaw/ALaw 8kHz mono
	\| ~~424ms~~		\| 444ms
	\|-		\|-
	\| PCM 8kHz mono		\| PCM 8kHz mono
	\| ~~424ms~~		\| 444ms
	\|-		\|-
	\| uLaw/ALaw 12kHz mono		\| uLaw/ALaw 12kHz mono
	\| ~~296ms~~		\| 316ms
	\|-		\|-
	\| PCM 12kHz mono		\| PCM 12kHz mono
	\| ~~296ms~~		\| 316ms
	\|-		\|-
	\| uLaw/ALaw 24kHz mono		\| uLaw/ALaw 24kHz mono
	\| ~~168ms~~		\| 188ms
	\|-		\|-
	\| PCM 24kHz mono		\| PCM 24kHz mono
	\| ~~168ms~~		\| 188ms
	\|-		\|-
	\| uLaw/ALaw 32kHz mono		\| uLaw/ALaw 32kHz mono
	\| ~~136ms~~		\| 156ms
	\|-		\|-
	\| PCM 32kHz mono		\| PCM 32kHz mono
	\| ~~134ms~~		\| 152ms
	\|-		\|-
	\| PCM 44.1kHz stereo		\| PCM 44.1kHz stereo
	\| ~~97ms~~		\| 110ms
	\|-		\|-
	\| PCM 44.1kHz mono		\| PCM 44.1kHz mono
	\| ~~72ms~~		\| 79ms
	\|-		\|-
	\| PCM 48kHz stereo		\| PCM 48kHz stereo
	\| ~~66ms~~		\| 72ms
	\|-		\|-
	\|}		\|}

Brain: /* Recommended Settings */

2010-06-24T09:36:40Z

Recommended Settings

← Older revision		Revision as of 09:36, 24 June 2010
Line 49:		Line 49:
	\| 600ms		\| 600ms
	\|-		\|-
	\| uLaw ~~8kHz mono<br>~~		\| uLaw/ALaw 8kHz mono
	ALaw 8kHz mono
	\| 424ms		\| 424ms
	\|-		\|-
Line 56:		Line 55:
	\| 424ms		\| 424ms
	\|-		\|-
	\| uLaw ~~12kHz mono<br>~~		\| uLaw/ALaw 12kHz mono
	ALaw 12kHz mono
	\| 296ms		\| 296ms
	\|-		\|-
Line 63:		Line 61:
	\| 296ms		\| 296ms
	\|-		\|-
	\| uLaw ~~24kHz mono<br>~~		\| uLaw/ALaw 24kHz mono
	ALaw 24kHz mono
	\| 168ms		\| 168ms
	\|-		\|-
Line 70:		Line 67:
	\| 168ms		\| 168ms
	\|-		\|-
	\| uLaw ~~32kHz mono<br>~~		\| uLaw/ALaw 32kHz mono
	ALaw 32kHz mono
	\| 136ms		\| 136ms
	\|-		\|-

Brain: /* Configuration */

2010-06-24T09:35:44Z

Configuration

← Older revision		Revision as of 09:35, 24 June 2010
Line 34:		Line 34:
	The delay parameter is the desired processing delay of the decoder (between the network input and the audio output). Please note that the end-to-end delay between the encoder and the decoder might be (significantly) different to the value configured.		The delay parameter is the desired processing delay of the decoder (between the network input and the audio output). Please note that the end-to-end delay between the encoder and the decoder might be (significantly) different to the value configured.

	In an ideal case the delay parameter would be 0 ms, however due to device's internal buffers a small delay (depending on the hardware) is inevitable. The delay value should also cover possible temporary network hick-ups (jitter). E.g. if the network ~~might~~ sometimes ~~delay~~ the packet delivery by 20ms due to a temporary load, the configured parameter should not be less than 20ms.		In an ideal case the delay parameter would be 0 ms, however due to device's internal buffers a small delay (depending on the hardware) is inevitable. The delay value should also cover possible temporary network hick-ups (jitter). E.g. if the network sometimes delays the packet delivery by 20ms due to a temporary load, the configured parameter should not be less than 20ms.

	The maximum configurable delay is limited by the device's internal buffer (64, 32 or 16kB).		The maximum configurable delay is limited by the device's internal buffer (64, 32 or 16kB).

	~~The following sections show recommended delay values for various audio formats.~~
	=== Recommended Settings ===		=== Recommended Settings ===
			The following table lists recommended delay values for various audio formats:

	{\| border="1" cellpadding="3" cellspacing="0"		{\| border="1" cellpadding="3" cellspacing="0"
	\|-		\|-
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	=== Maximum Settings ===		=== Maximum Settings ===
			This section explains the minimum and the maximum delay values for different audio formats and platforms.

			The hardware is divided into two groups:
			* '''Micronas (MAS) based devices:''' Annuncicom 100/155/200/1000, Exstreamer 1000
			* '''VLSI based devices:''' Exstreamer 100/110/200

	====MP3 CBR====		====MP3 CBR====
	The following table shows the minimum and the maximum possible delay with MP3 constant bitrate. The maximum delay differs between the Streaming Client, which has 64kB audio buffer available, and ABCL (Annuncicom FDX, STL), which features only 32kB buffer. The minimum delay includes 100ms network jitter.		The following table shows the minimum and the maximum possible delay with MP3 constant bitrate. The maximum delay differs between the Streaming Client, which has 64kB audio buffer available, and ABCL (Annuncicom FDX, STL), which features only 32kB buffer. The minimum delay includes 100ms network jitter.

Brain: /* Configuration */

2010-06-24T09:30:33Z

Configuration

@@ Line 40: / Line 40: @@
 The following sections show recommended delay values for various audio formats.
 === Recommended Settings ===
 ====MP3 CBR====
 The following table shows the minimum and the maximum possible delay with MP3 constant bitrate. The maximum delay differs between the Streaming Client, which has 64kB audio buffer available, and ABCL (Annuncicom FDX, STL), which features only 32kB buffer. The minimum delay includes 100ms network jitter.

Brain: /* PCM */

2010-06-24T09:25:15Z

PCM

← Older revision		Revision as of 09:25, 24 June 2010
Line 155:		Line 155:
	\| 60ms		\| 60ms
	\| 424ms		\| 424ms
			\| 4075ms
			\| 2027ms
			\| 1003ms
	\|-		\|-
	\| uLaw 12kHz mono<br>		\| uLaw 12kHz mono<br>

Brain: /* PCM */

2010-06-24T09:24:32Z

PCM

← Older revision		Revision as of 09:24, 24 June 2010
Line 138:		Line 138:
	\|-		\|-
	\|'''Format'''		\|'''Format'''
			\|'''Min delay MAS'''
	\|'''Min delay VLSI'''		\|'''Min delay VLSI'''
	~~\|'''Min delay MAS'''~~
	\|'''Max delay (SC)'''		\|'''Max delay (SC)'''
	\|'''Max delay (ABCL)'''		\|'''Max delay (ABCL)'''
Line 146:		Line 146:
	\| uLaw 8kHz mono<br>		\| uLaw 8kHz mono<br>
	ALaw 8kHz mono		ALaw 8kHz mono
	~~\| 349ms~~
	\| 80ms		\| 80ms
	\| ~~8170ms~~		\| 424ms
	\| ~~4057ms~~		\| 8171ms
			\| 4075ms
	\| 2027ms		\| 2027ms
	\|-		\|-
	\| PCM 8kHz mono		\| PCM 8kHz mono
	~~\| 323ms~~
	\| 60ms		\| 60ms
	\| ~~4075ms~~		\| 424ms
	~~\| 2027ms~~
	~~\| 1003ms~~
	\|-		\|-
	\| uLaw 12kHz mono<br>		\| uLaw 12kHz mono<br>
	ALaw 12kHz mono		ALaw 12kHz mono
	~~\| 246ms~~
	\| 67ms		\| 67ms
			\| 296ms
	\| 5441ms		\| 5441ms
	\| 2710ms		\| 2710ms
Line 168:		Line 165:
	\|-		\|-
	\| PCM 12kHz mono		\| PCM 12kHz mono
	~~\| 229ms~~
	\| 54ms		\| 54ms
			\| 296ms
	\| 2710ms		\| 2710ms
	\| 1345ms		\| 1345ms
Line 176:		Line 173:
	\| uLaw 24kHz mono<br>		\| uLaw 24kHz mono<br>
	ALaw 24kHz mono		ALaw 24kHz mono
			\| 54ms
			\| 168ms
			\| 2710ms
			\| 1345ms
			\| 662ms
	\|-		\|-
	\| PCM 24kHz mono		\| PCM 24kHz mono
			\| 47ms
			\| 168ms
			\| 1345ms
			\| 662ms
			\| 321ms
	\|-		\|-
	\| uLaw 32kHz mono<br>		\| uLaw 32kHz mono<br>
	ALaw 32kHz mono		ALaw 32kHz mono
			\| 50ms
			\| 136ms
			\| 2027ms
			\| 1003ms
			\| 491ms
	\|-		\|-
	\| PCM 32kHz mono		\| PCM 32kHz mono
			\| 43ms
			\| 134ms
			\| 1005ms
			\| 493ms
			\| 237ms
	\|-		\|-
	\| PCM 44.1kHz stereo		\| PCM 44.1kHz stereo
			\| 31ms
			\| 97ms
			\| 729ms
			\| 358ms
			\| 172ms
	\|-		\|-
	\| PCM 44.1kHz mono		\| PCM 44.1kHz mono
			\| 16ms
			\| 72ms
			\| 364ms
			\| 179ms
			\| 86ms
	\|-		\|-
	\| PCM 48kHz stereo		\| PCM 48kHz stereo
	\|-		\| 15ms
			\| 66ms
			\| 335ms
			\| 164ms
			\| 79ms
	\|-		\|-
	\|}		\|}

Brain: /* PCM */

2010-06-24T09:09:52Z

PCM

← Older revision		Revision as of 09:09, 24 June 2010
Line 142:		Line 142:
	\|'''Max delay (SC)'''		\|'''Max delay (SC)'''
	\|'''Max delay (ABCL)'''		\|'''Max delay (ABCL)'''
			\|'''Max delay (ABCL full duplex)'''
	\|-		\|-
	\| uLaw 8kHz mono<br>		\| uLaw 8kHz mono<br>
	ALaw 8kHz mono		ALaw 8kHz mono
			\| 349ms
			\| 80ms
			\| 8170ms
			\| 4057ms
			\| 2027ms
	\|-		\|-
	\| PCM 8kHz mono		\| PCM 8kHz mono
			\| 323ms
			\| 60ms
			\| 4075ms
			\| 2027ms
			\| 1003ms
	\|-		\|-
	\| uLaw 12kHz mono<br>		\| uLaw 12kHz mono<br>
	ALaw 12kHz mono		ALaw 12kHz mono
			\| 246ms
			\| 67ms
			\| 5441ms
			\| 2710ms
			\| 1345ms
	\|-		\|-
	\| PCM 12kHz mono		\| PCM 12kHz mono
			\| 229ms
			\| 54ms
			\| 2710ms
			\| 1345ms
			\| 662ms
	\|-		\|-
	\| uLaw 24kHz mono<br>		\| uLaw 24kHz mono<br>