Picture In Picture

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Picture in Picture (PiP) is a feature of some television receivers and similar devices. One Television program (channel) is displayed on the full TV screen at the same time as one or more other programs are displayed in inset windows. Sound is usually from the main program only.

Picture and Picture (PAP, P&P) (commonly referred to as PBP - Picture by Picture) is a related feature showing two programs side-by-side on the screen, with the sound from one program being played through the Loudspeaker, and the sound from the other being sent to headphones.

Picture in Picture requires two independent tuners or signal sources to supply the large and the small picture. Two-tuner PiP TVs have a second tuner built in, but a single-tuner PiP TV requires an external signal source, which may be an external tuner, VCR, DVD player, or a cable box with composite video outputs. Picture in Picture is often used to watch one program while waiting for another to start, or advertisements to finish.

Adding a picture into an existing picture was done long before affordable PiP was available on consumer products. The first PiP was seen on the televised coverage of the 1976 Montreal Olympics where a Quantel digital framestore device was used to insert a close-up picture of the Olympic flame during the opening ceremony.

An early consumer implementation of Picture-In-Picture was the Multivision set-top box; it was not a commercial success. Later PiP became available as a feature of advanced television receivers.

The new HD DVD specification includes picture in picture, allowing viewers to see, say, the director's comment on a film they are watching.