TrrsJack
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TRS, TRRS Jack
TRS and TRRS are two types of jack plugs with 3 and 4 poles.
TRS Jack
A TRS Jack is a standard Jack plug used for a stereo headset. Typically it is 3.5 mm diameter, but also (tiny) 2.5 mm and (large) 6 mm exist.
TRS stands for Tip-Ring-Sleeve and denotes the three poles with sleeve being the inner pole next to the plastic/rubber cover of the plug.
The poles usage are standardised, all headsets and cables use same configuration.
Tip R S +----- /---|--|--| \---|--|--| 1 2 3 +----- . 1: Audio left - white 2: Audio right - red 3: Ground
TRRS Jack
A TRRS Jack is a jack plug with 4 poles, named from Tip-Ring-Ring-Sleeve, similar to the 3 poles TRS.
Depending on the type of device the extra pole may provide a composite video signal together with stereo sound.
Today (2011) many smart phones have a TV-out function that allow to display the phones display on a TV or video monitor using the Jack plug otherwise intended for headsets. The signal used is a composite video signal (SD resolution 15625 Hz line frequency). Note this is not a VGA like signal.
Unfortunately there is no clear standard pole configuration for this plug. There exists several configurations.
Config 1 (Nokia, Samsung):
Tip R1 R2 S +----- /---|--|--|--| \---|--|--|--| 1 2 3 4 +-----
1: Audio left - white 2: Audio right - red 3: Video - yellow 4: Common/Ground - Shield
Tested smart phones:
Nokia N900
Samsung Galaxy S
Config 2 (Apple):
Tip R1 R2 S +----- /---|--|--|--| \---|--|--|--| 1 2 3 4 +----- . 1: Audio left - white 2: Audio right - red 3: Common/Ground - Shield 4: Video - yellow Note: R2 and S is swapped compared to Config 1.
Smart phones:
Apple Iphone 4 - not tested
