PSI SI DVB-H - Revision history

Yliu at 16:50, 27 May 2008

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Yliu at 16:48, 27 May 2008

2008-05-27T16:48:39Z

Yliu at 16:44, 27 May 2008

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Yliu at 16:44, 27 May 2008

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Yliu at 16:42, 27 May 2008

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Yliu at 08:04, 27 May 2008

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Yliu at 08:02, 27 May 2008

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Yliu at 07:30, 27 May 2008

2008-05-27T07:30:23Z

Yliu at 07:20, 27 May 2008

2008-05-27T07:20:23Z

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== What is PSI/SI in DVB-H: ==
PSI (Program Specific Information) consists of data enabling a decoder to demultiplex DVB-H services. It contains the following table: PAT, PMT, NIT, CAT
SI provides information on DVB-H services carried by different multiplexes, it contains the following table: BAT, SDT, EIT, RST, TDT, TOT, ST

== Is PSI/SI mandatory in DVB-H? ==
Yes, in order for cell phones to receive DVB-H programs, Timeslicing, MPE-FEC, PSI/SI and ESG are all needed.
To get the DVB-H service correctly for the cell phone, server must insert the associated information into the TS stream, that is PSI and SI.

== PSI/SI and receiver (cell phone) ==
When the cell phone starts to receive DVB-H program, it actually starts with receiving PSI/SI. They are in the table format, no encryption and directly built in the TS datagram.

From PSI/SI information, the cell phone knows the program list and the PID of each program in the received TS. After that the cell phone can start to receive the particular PID of the target program and ignore all PIDs of all other programs in the same TS.

== DVB-H network layer ==

[http://www.sfu.ca/~yliu1/layer1.jpg]

== PSI/SI and DVB network ==
A DVB network is uniquely identified by a network_id. A DVB network consist of one or more Transport Streams
(TS), each carrying a multiplex and being transmitted by one or more DVB signals. Information about a DVB network
is available within the NIT sub_table (identified by network_id). The NIT lists all multiplexes and DVB signals
available within the DVB network. The NIT is carried within each DVB network.

PSI contains the following tables:
PAT（Program Association Table）:The PAT lists PIDs for all PMTs in the stream. TS Packets containing PAT information always have PID 0x0.

PMT（Program Map Table）:contain information about programs. For each program, there is a PMT.

NIT（Network Information Table）: provides information about the multiplexes and transport streams on a given network. Information about the current network uses table_id of 0x40, that about other networks uses table_id of 0x41

CAT（Conditional Access Table）:This table is used for conditional access to the streams. This table provides association with EMM stream.

== How a mobile TV receiver using PSI/SI table to find the first time-slicing bursts ==
more detail will be added

== How a mobile TV receiver switch channels ==
channel switch request is initiated via a user interface. This causes a mobile broadcast receiver to switch from the first channel to the second channel.
more detail will be added, e.g how PSI/SI control this

@@ Line 18: / Line 18: @@
 == DVB-H network layer ==
 [[Image:newlayer1.jpg]]
 A DVB network is uniquely identified by a network_id. A DVB network consist of one or more Transport Streams
@@ Line 39: / Line 41: @@
 The releationship between PAT and PMT are:
 [[Image:newlayer3.jpg]]
 == SI contains the following tables: ==

@@ Line 17: / Line 17: @@
 == DVB-H network layer ==
-[[Image:layer1.jpg]]
+[[Image:newlayer1.jpg]]
 A DVB network is uniquely identified by a network_id. A DVB network consist of one or more Transport Streams
@@ Line 39: / Line 39: @@
 The releationship between PAT and PMT are:
-[[Image:layer1.jpg]]
+[[Image:newlayer3.jpg]]

@@ Line 17: / Line 17: @@
 == DVB-H network layer ==
-[[layer1.jpg]]
+[[Image:layer1.jpg]]
 A DVB network is uniquely identified by a network_id. A DVB network consist of one or more Transport Streams
@@ Line 39: / Line 39: @@
 The releationship between PAT and PMT are:
-[[layer1.jpg]]
+[[Image:layer1.jpg]]

@@ Line 17: / Line 17: @@
 == DVB-H network layer ==
-This is a very important picture, my account can not upload picture to this wiki, have to put it on my SFU webpage.
+[[layer1.jpg]]
 A DVB network is uniquely identified by a network_id. A DVB network consist of one or more Transport Streams
@@ Line 40: / Line 39: @@
 The releationship between PAT and PMT are:
-[http://www.sfu.ca/~yliu1/layer3.jpg]
+[[layer1.jpg]]
@@ Line 73: / Line 72: @@
 The complete programs and program list is contains in INT and SDT.  Note: ESG address is described in the INT table

@@ Line 1: / Line 1: @@
 == What is PSI/SI in DVB-H: ==
 PSI (Program Specific Information) consists of data enabling a decoder to demultiplex DVB-H services. It contains the following table: PAT, PMT, NIT, CAT
 SI provides information on DVB-H services carried by different multiplexes, it contains the following table: SDT, EIT, RST, TDT, TOT, ST
@@ Line 72: / Line 73: @@
 The complete programs and program list is contains in INT and SDT.  Note: ESG address is described in the INT table

@@ Line 13: / Line 13: @@
 From PSI/SI information, the cell phone knows the program list and the PID of each program in the received TS. After that the cell phone can start to receive the particular PID of the target program and ignore all PIDs of all other programs in the same TS.
 == DVB-H network layer ==
@@ Line 61: / Line 62: @@
 == How a mobile TV receiver switch channels ==
 channel switch request is initiated via a user interface. This causes a mobile broadcast receiver to switch from the first channel to the second channel.  It is actually switching to another PID. We can use NIT, PAT, PMT, INT tables to trace that PID (get it from PMT). See following session for tracing service_id
 == To trace service_id ==

@@ Line 15: / Line 15: @@
 == DVB-H network layer ==
-[http://www.sfu.ca/~yliu1/layer1.jpg]
+A DVB network is uniquely identified by a network_id. A DVB network consist of one or more Transport Streams
-PSI contains the following tables:
+== PSI contains the following tables: ==
 PAT（Program Association Table）:The PAT lists PIDs for all PMTs in the stream. TS Packets containing PAT information always have PID 0x0.
@@ Line 35: / Line 36: @@
 CAT（Conditional Access Table）:This table is used for conditional access to the streams. This table provides association with EMM stream.