Ericsson RX8000 PES, PID, PIN, PLL, PMT, ppm, PPV, Pixel, pk-pk, Program, Programme, P-picture/P-frame

Annex A

PES	Packetised Elementary Stream: A sequential stream of data bytes
	that has been converted from original elementary streams of audio
	and video access units and transported as packets. Each PES
	packet consists of a header and a payload of variable length and
	subject to a maximum of 64 kbytes. A time stamp is provided by the
	MPEG-2 systems layer to ensure correct synchronization between
	related elementary streams at the Decoder.
PID	Packet Identifier: the header on a packet in an elementary data
	stream, which identifies that data stream. An MPEG-2 / DVB
	standard.
PIN	Personal Identification Number: A password used to control access
	to programming and to set purchase limits. Each subscriber
	household can activate several PINs and may use them to set
	individual parental rating or spending limits for each family member.
Pixel	PIX (picture) Element: The digital representation of the smallest
	area of a television picture capable of being delineated by the
	bit-stream. See Pel for more information.
pk-pk	peak to peak: Measurement of a signal or waveform from its most
	negative point to its most positive point.
PLL	Phase-Locked Loop. A phase-locked loop is a control system which
	controls the rotation of an object by comparing its rotational position
	(phase) with another rotating object as in the case of a sine wave or
	other repeating signal. This type of control system can synchronize
	not only the speed, but also the angular position of two waveforms
	that are not derived from the same source.
PMT	Program Map Table: Part of the MPEG-2 Program Specific
	Information (PSI) data and is mandatory for MPEG-2 compliance.
	Each service has a PMT, which lists the component parts
	(elementary streams of video, audio, etc.) for the various services
	being transmitted.
P-picture/P-frame	A picture / frame produced using forward prediction. It contains
	predictions from either previous I frames or previous P frames. The
	P frame is used as a reference for future P or B frames.
ppm	Parts per million.
PPV	Pay Per View: A system of payment for viewing services based on a
	usage / event basis rather than on on-going subscription.
	Subscribers must purchase viewing rights for each PPV event that
	they wish to view. PPV events may be purchased as IPPV or OPPV.
Program	PC - A sequence of instructions for a computer.
	TV - A concept having a precise definition within ISO 13818-1
	(MPEG-2). For a transport stream, the timebase is defined by the
	PCR. The use of the PCR for timing information creates a virtual
	channel within the stream.
Programme	A linking of one or more events under the control of a broadcaster.
	For example, football match, news, film show. In the MPEG-2
	concept, the collection of elementary streams comprising the
	programme, have a common start and end time. A series of
	programmes are referred to as events.

A-14 EN/LZT 790 0005 R1A