Glossary

See Inter Frame.

Packets are units of information sent across a packet switched network from their source address to a destination. Packet loss occurs when one or more packets fail to reach their destination. On network protocols such as UDP that provide no recovery mechanism for packet loss, applications should handle that error ...

A term used to describe playback video on a PAL TV.In general, PAL refers to standard definition (SD) video with vertical resolution of up to 576 pixels and horizontal resolution of up to 720 pixels. PAL frame rate is 25 fps.PAL broadcasting can be found in Western Europe countries, Australia, ...

PER (Packed Encoding Rules) is an encoding specification for ASN.1 definitions. It is defined in ITU-T X.691 standard. PER is optimized for size, where ASN.1 messages gets encoded into a relatively small size when sent over the network. For example, a boolean field in PER will get encoded using a ...

PSNR, an abbreviation of Peak Signal-to-Noise Ratio, a term used to describe objectively the quality of data, which is the result of decompressing encoded data. For example, the quality of a certain image in a video bit stream. PSNR is the ratio between the maximum possible power of a signal ...

Packet-Switched Streaming offers the basic building block for streaming services using IP over cellular networks. It is based on 3GPP and 3GPP2 specifications (TS 26.233, TS 26.234, and TS 26.244). At the heart of the PSS specification lies the RTSP protocol. Interoperability of PSS is being handled by the IMTC.

Some cameras are fixed while others can move around. Those that can move around are called “PTZ cameras”, or “Pan-Tilt-Zoom Cameras”, as they can pan and tilt (move up and down and to the sides) and they can zoom in and out – mechanically. PTZ cameras usually rely on motors ...