EP2232868A2 - Method and device for receiving a digital television conveyance stream, and corresponding digital television receiver and computer software - Google Patents
Method and device for receiving a digital television conveyance stream, and corresponding digital television receiver and computer softwareInfo
- Publication number
- EP2232868A2 EP2232868A2 EP08864774A EP08864774A EP2232868A2 EP 2232868 A2 EP2232868 A2 EP 2232868A2 EP 08864774 A EP08864774 A EP 08864774A EP 08864774 A EP08864774 A EP 08864774A EP 2232868 A2 EP2232868 A2 EP 2232868A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- value
- psi
- digital television
- psi table
- dvb
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/435—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/42—Arrangements for resource management
- H04H20/426—Receiver side
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/25—Arrangements for updating broadcast information or broadcast-related information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/235—Processing of additional data, e.g. scrambling of additional data or processing content descriptors
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
- H04N21/4345—Extraction or processing of SI, e.g. extracting service information from an MPEG stream
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/643—Communication protocols
- H04N21/64315—DVB-H
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/162—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
- H04N7/163—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing by receiver means only
Definitions
- the present invention relates to a method for receiving, by a DVB-H portable digital television receiver, a DVB digital television transport stream comprising TS transport packets, said reception method comprising: a recovery step of a TS transport packet, the TS transport packet carrying an SI / PSI table, the SI / PSI table including a version field; and
- a step of reading the value of the version field of the SI / PSI table carried by the transport packet TS It also relates to a receiving device, a DVB-H receiver and a corresponding computer program.
- the invention relates to DVB digital video broadcasting systems ("Digital Video Broadcasting") including broadcast systems for DVB-H portable receivers ("Digital Video Broadcast for Handheld terminais").
- Digital Video Broadcasting Digital Video Broadcasting
- DVB-H portable receivers Digital Video Broadcast for Handheld terminais
- the DVB-H system has been introduced to be able to broadcast DVB transport streams to a portable receiver with limited resources in terms of battery.
- DVB transport stream data There are two types of DVB transport stream data. This is either useful data that defines services or service information called information SI / PSI ("Service Information / Program Specifies Information”) which describe the means including in terms of network to access the payload.
- SI / PSI Service Information / Program Specifies Information
- the SI service information is defined in the form of tables that define, inter alia, a network identifier uniquely determining the network used to convey the payload of at least one service by a platform identifier that uniquely determines the supporting platform. conveying the useful data of the one or more of these services and by a program identifier of the transport stream TS packets which carry the useful data of this or these services.
- the program specific information is also defined in the form of tables making it possible, among other things, to access the elementary streams constituting a service, for example to each audio and video stream of an audiovisual program service chosen by a user and to synchronize these elementary streams during their decoding and presentation to this user.
- the information SI / PSI will be called service information.
- the SI / PSI service information enables the DVB-H receiver to obtain service designation indications.
- the SI / PSI service information includes a number of different SI / PSI tables. The tables
- SI / PSI are used especially for the decoding of digital television services.
- SI / PSI tables are broadcast regularly with sufficient recurrence to refresh the information at the DVB-H receiver.
- the object of the invention is to solve this problem.
- the invention aims to avoid unnecessary consumption of the DVB-H receiver battery for the recovery of SI / PSI service information tables.
- the object of the invention is a method of reception, by a DVB-H portable digital television receiver, of a transport stream of DVB digital television comprising TS transport packets, said receiving method comprising:
- a step of recovering a TS transport packet the TS transport packet carrying an SI / PSI table, the SI / PSI table comprising a version field;
- the method comprises one or more of the following characteristics, taken separately or in any technically possible combination: the SI / PSI table is not recovered in the case where the value read is identical at the saved value,
- the method comprises a step of recovering all subsequent successive SI / PSI service information tables
- the invention also relates to a device for receiving a DVB digital television transport stream comprising TS transport packets, said reception device comprising:
- SI / PSI carried by the TS transport packet characterized in that it comprises: means for comparing (14) the read value of the version field of said SI / PSI table with a stored value;
- the invention further relates to a DVB-H portable digital television receiver (4), characterized in that it comprises a reception device as described above.
- the invention also relates to a computer program comprising code instructions which, when this program is executed on a computer, implement a method of receiving a digital television transport stream as described above. .
- FIG. 1 represents a portable terminal comprising a device for receiving a DVB transport stream according to the invention.
- FIG. 2 is a flowchart illustrating a method of receiving a DVB transport stream according to the invention, implemented by the device of FIG. 1.
- FIG. 1 shows a portable terminal 2 equipped with a DVB-H receiver 4 and interaction means 6 between the terminal 2 and the receiver 4.
- the DVB-H receiver 4 is provided with means 8 for recovering TS transport packets and means for reading the version field values contained in SI / PSI service information tables contained in said transport packets.
- the DVB-H receiver 4 is also provided with means for recording and storing the values of the version fields of the SI / PSI service information tables.
- the receiver 4 is provided with means 14 for comparing a version field value read by the reading means 10 with a version field value recorded in the recording and storage means 12.
- the DVB-H receiver 4 includes recovery means 16 of the SI / PSI service information tables. Since the structure of the DVB-H 4 receiver has been described, the following description relates to the operation of a method for receiving a DVB transport stream according to the invention, implemented by the device of FIG.
- the TS transport packets carry the data of the services by time multiplexing.
- the TS transport packets of a service are transmitted at a certain frequency, for example every three seconds.
- the TS transport packets of the other services are sent.
- the terminal 2 when the terminal 2 receives only one service, it is possible to turn on the receiver only periodically, at the previous frequency (for example every three seconds), which allows the electrical extinction of some parts of the portable terminal. The life of the battery is extended.
- SI / PSI tables are inserted at regular intervals into TS transport packets (regardless of the service they carry). At each interval, one of the SI / PSI tables is inserted. The frequency with which an SI / PSI table is inserted is different for each SI / PSI table. Thus, an SI / PSI table can be inserted several times in the transport stream, while another SI / PSI table is inserted only once in the transport stream.
- the recovery means recover in 8 18 n ⁇ eme TS transport packet that carries a SI / PSI table.
- the SI / PSI table includes a version field, the value of which changes when the data in the SI / PSI table changes.
- the reading means 10 read the value of the version field of the SI / PSI table conveyed in the nth transport packet TS.
- the comparison means 14 compare the value read with a stored value of said stored field in the recording and storage means 12.
- the result of the comparison indicates in 24 that the read value of the version field of the SI / PSI table is equal to the registered value of said version field, the associated SI / PSI table is not recovered in 28. Indeed, the result of the comparison indicates that the current version of said table is identical to the previous version of the table known by the DVB-H receiver 4 after a previous recovery. It is therefore useless to recover this table a second time. However, if the result of the comparison indicates at 26 that the value read is different from the value recorded, the recovery means 16 of the SI / PSI tables recover the entire SI / PSI table conveyed in the nth packet. TS transport, so that this SI / PSI table is used by the terminal 2.
- the recording and storage means 12 record at 32 the value read in place of the recorded value.
- the recovery means 16 of the SI / PSI tables recover not only the SI / PSI table concerned but also a number of subsequent successive SI / PSI tables.
- the DVB-H receiver is kept turned on for a predetermined time. This predetermined duration is chosen so that the number of successive SI / PSI tables received is sufficient for each different SI / PSI table to be received at least once. Thus, all SI / PSI tables are received and recorded, so that they are used by the terminal 2.
- the storage and storage means 12 replace the registered values of the version fields of all the SI / PSI tables by their values read at 10.
- the SI / PSI service information tables retrieved at 30 are transmitted to the interaction means 6 between the terminal 2 and the receiver 4 so that a user of the terminal 2 can access the desired DVB-H services.
- Steps 18 to 34 are then repeated for the (n + 1) th transport packet TS and so on to recover only the IF / PSI tables whose version field has changed.
- the invention makes it possible to perform the recovery of an SI / PSI table only when a version change of this table is detected. This makes it possible not to consume the battery power of the terminal unnecessarily as in the state of the art.
- the invention makes it possible to improve the time taken to take into account the change of a SI / PSI table with respect to in the state of the art.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0760298A FR2925817B1 (en) | 2007-12-21 | 2007-12-21 | METHOD AND APPARATUS FOR RECEIVING DIGITAL TELEVISION TRANSPORT STREAM, DIGITAL TELEVISION RECEIVER AND CORRESPONDING COMPUTER PROGRAM |
PCT/FR2008/052367 WO2009081057A2 (en) | 2007-12-21 | 2008-12-18 | Method and device for receiving a digital television conveyance stream, and corresponding digital television receiver and computer software |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2232868A2 true EP2232868A2 (en) | 2010-09-29 |
Family
ID=39357941
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08864774A Withdrawn EP2232868A2 (en) | 2007-12-21 | 2008-12-18 | Method and device for receiving a digital television conveyance stream, and corresponding digital television receiver and computer software |
Country Status (4)
Country | Link |
---|---|
US (1) | US20110055868A1 (en) |
EP (1) | EP2232868A2 (en) |
FR (1) | FR2925817B1 (en) |
WO (1) | WO2009081057A2 (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7812887B2 (en) * | 2005-05-19 | 2010-10-12 | Nokia Corporation | Methods and apparatus for signaling offsets and changes in digital broadcast networks |
KR100754678B1 (en) * | 2005-07-20 | 2007-09-03 | 삼성전자주식회사 | Digital multimedia broadcastingdmb system and program specific information service informationpsi/si transport and psi/si parsing method for lessening work load of dmb receiver |
-
2007
- 2007-12-21 FR FR0760298A patent/FR2925817B1/en not_active Expired - Fee Related
-
2008
- 2008-12-18 WO PCT/FR2008/052367 patent/WO2009081057A2/en active Application Filing
- 2008-12-18 EP EP08864774A patent/EP2232868A2/en not_active Withdrawn
- 2008-12-18 US US12/809,305 patent/US20110055868A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2009081057A2 * |
Also Published As
Publication number | Publication date |
---|---|
WO2009081057A2 (en) | 2009-07-02 |
US20110055868A1 (en) | 2011-03-03 |
FR2925817A1 (en) | 2009-06-26 |
FR2925817B1 (en) | 2010-10-01 |
WO2009081057A3 (en) | 2009-10-22 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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17P | Request for examination filed |
Effective date: 20100719 |
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AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR |
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AX | Request for extension of the european patent |
Extension state: AL BA MK RS |
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DAX | Request for extension of the european patent (deleted) | ||
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: PARROT |
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17Q | First examination report despatched |
Effective date: 20131017 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20140429 |