MPEG: Difference between revisions

Revision as of 23:47, 18 September 2020

MPEG-TS or TS and MPEG-PS or PS are digital container format.

I-picture: intra-coded picture that does not need additional information to be decoded

P-picture: picture predicted from an earlier I-picture or P-picture

B-picture: picture bidirectionally predicted from earlier and/or later I-picture or P-pictures

MPEG-1 Audio layer 1: audio bit stream

MPEG-1 Audio layer 2: audio bit stream

MPEG-1 Audio layer 3: audio bit stream

MPEG-2 BC (Backward compatible)

MPEG-2 AAC

MPEG-4 Audio

AC-3

MPEG-1

MPEG-2

MPEG-4

MPEG-7/MXF: metadata

MPEG-21



Elementary Stream	ES	Bitstream raw output of a video or audio encoder
Packetized Elementary Stream	PES	Carry ES with a header that contains PTS, DTS
Program Stream	PS	For error-free medium (e.g. optical and hard disks) Variable-length PES 1 video PES + n audio PES Common Clock
Transport Stream	TS	For transmission and digital broadcasting PES packet: fixed-sized 184 bytes TS packet: fixed-sized 188 bytes TS packet header: 4 bytes added to the PES packet (PID) Multiple PS can be multiplexed with different clocks (PCR) Metadata: PAT, PMT
Single Program Transport Stream	SPTS
Program Association Table	PAT	Lists every programs in the TS Each entry points to a PMT PID=0
Program Map Table	PMT	Each entry lists for each program the list of ES
Program Identifier Code	PID	Packets in the same ES all have the same PID TS Packet header
Program Clock Reference	PCR	27MHz resolution Bitstream timing PCR for each program in a TS
System Clock Reference	SCR	27MHz resolution Bitstream timing
Presentation Timestamp	PTS	Use to achieve synchronization of separate ES 90KHz resolution In the PES header
	DTS



https://download.tek.com/document/25W-11418-10.pdf
https://en.wikipedia.org/wiki/MPEG_elementary_stream
https://en.wikipedia.org/wiki/MPEG_transport_stream
https://en.wikipedia.org/wiki/MPEG_program_stream
https://en.wikipedia.org/wiki/Packetized_elementary_stream
https://en.wikipedia.org/wiki/Presentation_timestamp
https://en.wikipedia.org/wiki/Audio-to-video_synchronization
https://bitmovin.com/fun-with-container-formats-3/

@@ Line 1: / Line 1: @@
 MPEG-TS or TS and MPEG-PS or PS are digital container format.
+I-picture: intra-coded picture that does not need additional information to be decoded
+P-picture: picture predicted from an earlier I-picture or P-picture
+B-picture: picture bidirectionally predicted from earlier and/or later I-picture or P-pictures
+MPEG-1 Audio layer 1: audio bit stream
+MPEG-1 Audio layer 2: audio bit stream
+MPEG-1 Audio layer 3: audio bit stream
+MPEG-2 BC (Backward compatible)
+MPEG-2 AAC
+MPEG-4 Audio
+AC-3
+MPEG-1
+MPEG-2
+MPEG-4
+MPEG-7/MXF: metadata
+MPEG-21
 === Glossary ===
@@ Line 11: / Line 41: @@
 |ES
 |
-* Bitstream output of a video or audio encoder
+* Bitstream raw output of a video or audio encoder
 |-
 |Packetized Elementary Stream
@@ Line 31: / Line 61: @@
 |
 * For transmission and digital broadcasting
-* Fixed-sized packet PES (188 bytes)
+* PES packet: fixed-sized 184 bytes
+* TS packet: fixed-sized 188 bytes
+* TS packet header:  4 bytes added to the PES packet (PID)
 * Multiple PS can be multiplexed with different clocks (PCR)
 * Metadata: PAT, PMT
@@ Line 44: / Line 76: @@
 * Lists every programs in the TS
 * Each entry points to a PMT
+* PID=0
 |-
 |Program Map Table
@@ Line 54: / Line 87: @@
 |
 * Packets in the same ES all have the same PID
+* TS Packet header
 |-
 |Program Clock Reference