CN101009828A - Data encapsulation and transmission method of the digital TV - Google Patents
Data encapsulation and transmission method of the digital TV Download PDFInfo
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- CN101009828A CN101009828A CNA2007100728095A CN200710072809A CN101009828A CN 101009828 A CN101009828 A CN 101009828A CN A2007100728095 A CNA2007100728095 A CN A2007100728095A CN 200710072809 A CN200710072809 A CN 200710072809A CN 101009828 A CN101009828 A CN 101009828A
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Abstract
The data package and transmission method in digital TV data exchange field is to add a mapping table described message into the transmitted data flow, and special fit to DMMB standard.
Description
Technical field
The present invention relates to digital TV data exchange field, particularly the hand-held professional tunneling transmission of DMMB.
Background technology
Flourish at digital TV field, cable digital TV, terrestrial DTV, satellite digital TV have all obtained unprecedented application, the cable digital TV integral translation of various places at present, the appearance of terrestrial DTV standard, thing followed terrestrial DTV covers will be with huge market.Be accompanied by carrying out of 3G business, market is more and more obvious to the demand of hand-held mobile service, there are hand held television standards such as DMB-H, DVB-H to obtain more applications now, because for terrestrial DTV, hand held television has more been considered power saving, travelling performance, also relatively good to the support of value-added service simultaneously, therefore aspect the hand-held mobile service more wide application is being arranged.
At terrestrial DTV, the encapsulated delivery of hand mobile digital TV, ununified at present standard, this has just caused different terminals can only receive fixed data information, can't accomplish general, how to realize the common support of terminal, do not find feasible way as yet terrestrial DTV, hand mobile digital TV.
Summary of the invention
The object of the present invention is to provide the data encapsulation and transmission method of the Digital Television of a kind of DMMB of being applied to.
Purpose of the present invention can realize like this, designs a kind of data encapsulation and transmission method of Digital Television, may further comprise the steps: the mapping table that adds descriptor in transmitting data stream.
The present invention is applied in the DMMB standard, improves the range of application of hand held television.
Description of drawings
Fig. 1 is the system configuration schematic diagram of preferred embodiment of the present invention.
Fig. 2 is the positioning flow figure of one of preferred embodiment of the present invention.
Fig. 3 is two positioning flow figure of preferred embodiment of the present invention.
Embodiment
The invention will be further described below in conjunction with embodiment.
As shown in Figure 1, a kind of data encapsulation and transmission method of Digital Television may further comprise the steps: the mapping table that adds descriptor in transmitting data stream.
Be applied to DMMB-T, each the MPEG-TS bag in the input TS stream is directly transmitted without any processing.
Be applied to DMMB-H, inlet flow transmits by dual mode, DMMB-H IP stream mode and DVB compliant stream mode.
Described DMMB-H IP stream mode, input IP stream is encapsulated as the DMMB-IP bag, and in addition additional 4 bytes form the class TS pack arrangement of one 188 byte on the data of every group 184 byte; When being input as above 1 IP stream, each IP stream is encapsulated as the DMMB-IP bag of series; Being re-used into from the bag that each IP flows and DMMB-T stream is imported, DMMB flows.
Described class TS pack arrangement comprises sync_byte, transport_error_indicator, payload_unit_start_indictor, transport_priority, PID, reserved_bit, H_prog_id parameter.
Described sync_byte takies 8 bit fields, transport_error_indicator and takies 1 bit field, payload_unit_start_indictor and take 1 bit field, transport_priority and take 1 bit field, PID and take that 13 bit fields, reserved_bit take 2 bit fields, H_prog_id takies 6 bit fields.
The current DMMB-H program of IP stream mode sign is used for transmitting an IP stream.In such cases, input IP stream need be encapsulated as the DMMB-IP bag, and in addition additional 4 bytes form the class TS pack arrangement of one 188 byte on the data of every group 184 byte, as following table:
| Grammer | Figure place | Memonic symbol |
| DMB_IP_packet(){ | ||
| sync_byte | 8 | |
| transport_error_indicator | ||
| 1 | | |
| payload_unit_start_indictor | ||
| 1 | | |
| transport_priority | ||
| 1 | Bslbf | |
| PID | 13 | Bslbf |
| reserved_bit | 2 | Bslbf |
| H_prog_id | 6 | Uimsbf |
| for(i＝0；i＜184；i++){ data_byte } | 8 | Bslbf |
| } |
Sync_byte wherein, transport_error_indicator, payload_unit_start_indicator, transport_priority and PID field meets GB/T 17975.1[1] in the corresponding field definition.
Payload_unit_start_indictor: do not use, should be changed to 1.PID：0×0018。
Transport_priority: do not use, should be changed to 1.
It is a 6bit field for H_prog_id-, is used to refer to load and belongs to that DMMB-H program.H_prog_id is value between 0 to 62.Work as H_prog_id=0, load belongs to first H program.Work as H_prog_id=62, load belongs to last H program.H_prog_id=63 keeps.
When being input as a plurality of IP stream, each IP stream is encapsulated as a series of DMMB-IP bag.Being re-used into from the bag that each IP flows and DMMB-T stream comes, DMMB flows.Controlling packet is worked out in the back insertion DMMB stream in addition.
The bag that the current H program of compliant stream mode sign is used for transmitting is through multiplexing to the DVB compliant stream of a plurality of H programs.
When adopting the DMMB compatibility mode, DMMB receives the bag of TS structure as its load, and the while is not detected and revises wherein PID, transmits and put into the DMMB-H channel.
, when transmitting, need for IP stream earlier through ETS/EN 301 192[4 with the DVB compatibility mode] after the MPE encapsulation of regulation, be multiplexed into during DMMB flows.During reception, multi-channel program stream according to the timeslice information that is inserted into the primary flow the inside a plurality of program stream demultiplexings for some independent streams (H1, H2 ...), at demultiplexing and after separating MPE, restore original IP and flow.
Described mapping table is cut into the business description section, and the business description section is packaged into the TS bag that PID is 0X0019, at the stream of DMMB-T or H_prog_id be 1 DMMB-H stream the two one of or transmit simultaneously.
Described business description section comprises table identifier, section grammer designator, segment length, transport stream identification symbol, version information, current follow-up designator, segment number, last segment number, original network identification symbol, hand-held program ID number, hand-held program category, descriptor length of the cycle, CRC.
Described table identifier takies 8 bit fields, the Duan Yufa designator takies 1 bit field, segment length takies 12 bit fields, the transport stream identification symbol takies 16 bit fields, version information takies 5 bit fields, current follow-up designator takies 1 bit field, segment number takies 8 bit fields, last segment number takies 8 bit fields, the original network identification symbol takies 16 bit fields, take 6 bit fields hand-held program ID number, hand-held program category takies 8 bit fields, the descriptor length of the cycle takies 12 bit fields, CRC takies 32 bit fields.
Each sublist among the hand-held professional mapping table HSMT all is used for describing the various DMMB business that are contained in the specific transport stream.This business may be the part in the existing transport stream, also may be the part in other transport stream, can determine to distinguish above-mentioned two kinds of situations according to table_id.
The HSMT table is cut into business description section (handheld_service_map_section).The section of any formation HSMT table, all will be packaged into PID is the TS bag of 0x0019, this table must the stream of DMMB-T or H_prog_id be 1 DMMB-H stream the two one of or transmission simultaneously.Any section table_id value describing the HSMT table of existing TS (TS that promptly comprises the HSMT table) should be 0x30, and has identical table_id_extension (tranport_stream_id) and identical original_network_id.Point to any section table_id value of the HSMT table of other TS outside the existing TS and should get 0x31.
Be to transmit the HSMT table in 1 the DMMB-H circulation road as H_prog_id, its type is required to be the DVB compatible mode.
| Grammer | Figure place | Memonic symbol |
| handheld_service_map_section(){ table_id section_syntax_indicator reserved_future_use Reserved section_length transport_stream_id Reserved version_number current_next_indicator section_number last_section_number original_network_id reserved_future_use for(i＝0；i＜N；I++){ reserved_future_use H_prog_id H_prog_type reserved_future_use descriptors_loop_length for(j＝0；j＜N；j++){ descriptor() } } CRC_32 } | 8 1 1 2 12 16 2 5 1 8 8 16 8 2 6 8 4 12 32 | uimsbf bslbf bslbf bslbf uimsbf uimsbf bslbf uimsbf bslbf uimsbf uimsbf uimsbf bslbf bslbf uimsbf uimsbf bslbf uimsbf rpchof |
The semanteme of business description section:
Table identifier table_id:0x30 or 0x31.
Duan Yufa designator section_syntax_indicator:1 bit field is answered set.
Segment length section_length:12 bit field.The byte length of this section that its expression begins from the next byte of this field, and comprise CRC.Section_length can not surpass 4093, and whole like this section maximum length is 4096 bytes.
Transport stream identification symbol transport_stream_id:16 bit field, HSMT shows the sign of described TS, in order to other multiplex stream in the difference transmission system.
The version_number:5 of version number bit field.The version number of sign sublist.When the information that comprises when sublist changed, version_number added 1.On dutyly increase at 31 o'clock, be reset to 0.When the current_next_indicator set, then version_number is the version number of the sublist of current use.When the current_next_indicator reset, then version_number is the version number of the next sublist of using.
Current follow-up designator current_next_indicator:1 position designator.When by set, represent that current sublist just is used.When its reset, the expression sublist that passes is not used as yet, and it is next with the sublist that is used.
Segment number section_number:8 bit field has provided segment number.The section_number of first in the sublist section is designated as " 0x00 ".Section with identical table_id, transport_stream_id and original_network_id of every increase, section_number just adds 1.
Last segment number last_section_number:8 bit field, the segment number of last section (being the section of segment number maximum) of the sublist under the expression.
Original network identification accords with the original_network_id:16 bit field, provides the network_id of original transmitted system.
Hand-held program ID H_prog_id:6 bit field is used for identifying the DMMB program that a TS flows.When this identification number is 0 interval scale DMMB-T program, the hand-held program of other values (1-62) representative.Terminal can be provided with demodulator according to this field, to solve the DMMB program of appointment.
Hand program category H_prog_type:8 bit field, specify the type of the DMMB program that is identified for H_prog_id number.For the DMMB-T program, its type-restriction is the MPEG-TS type, and is identical with common mpeg program receiving course to its receiving course, and follows digital video broadcasting Chinese business information standard.
Hand-held program category coded system is as follows:
| H_prog_type | Describe |
| 0×00 | Reserve and use |
| 0×01 | MPEG-TS |
| 0×02 | IP MPE |
| 0×03 | DMMB-IP |
| 0 * 04 to 0 * FE | User definition |
| 0×FF | Reserve and use |
Descriptor length of the cycle descriptors_loop_length:12 bit field is pointed out the total byte length of the descriptor that begins from the next byte of this field.
CRC 32:32 bit field.Comprised crc value, handled after whole section, the register of the CRC decoder of appendix B definition is output as zero.
Provided the descriptor tabulation that may in HSMT, occur in the following table:
| Descriptor | The Tag value | Definition and explanation |
| linkage_descriptor | 0×4A | [2] are seen in definition |
| MPE_stream_location_descri ptor | 0×70 | See below |
| parameter_descriptor | 0×71 | See below |
| resource_id_descriptor | 0×72 | See below |
| service_descriptor | 0×48 | [2] are seen in definition; Do not support the NVOD type |
Wherein service descriptor is used to describe concrete business, comprises Business Name, service supplier etc.
MPE_stream_location_descriptor
This descriptor passes through network_id, original_network_id, transport_stream_id, the IP MPE stream in the DMMB network of parameters such as service_id and component_tag location.
| Title | Bit sequence | Sign | Remarks |
| MPE_stream_location_descriptor (){ | |||
| descriptor_tag | 8 | uimsbf | 0×70 |
| descriptor length | 8 | uimsbf | |
| original_network_id | 16 | uimsbf | |
| transport stream_id | 16 | uimsbf | |
| service id | 16 | uimsbf | |
| component_tag | 8 | uimsbf | |
| } |
The original_network_id:16 bit field provides the network_id of original transmitted system.
The transport_stream_id:16 bit field is used for distinguishing at the different code stream of same transmission system.
The service_id:16 bit field identifies a business among the TS uniquely.
The component_tag:8 bit field is got same value with the component_tag field in the traffic identifier descriptor (if the program map section of PSI comprises this descriptor) of assembly stream.
Parameter_descriptor, this descriptor are used to transmit the required parameter of parsing DMMB service.
| Title | Bit sequence | Sign | Remarks |
| parameter_descriptor(){ | |||
| descriptor tag | 8 | uimsbf | 0×71 |
| descriptor length | 8 | uimsbf | |
| for(i＝0；i＜N；I++){ | |||
| parameter_data | 8 | uimsbf | |
| } | |||
| } |
The parameter_data:8 bit field, the supplemental characteristic byte.
Resource_id_descriptor, the resource ID of a kind of overall situation of this descriptor definition number can conveniently be searched the unified location of the overall situation of resource.
| Title | Bit sequence | Sign | Remarks |
| resource_id_descriptor(){ | |||
| descriptor_tag | 8 | uimsbf | 0×70 |
| descriptor_length | 8 | uimsbf | |
| resource_id | 160 | uimsbf | |
| } |
The resource_id:160 bit field provides the resource ID number of an overall situation.
The DMMB terminal at first should be set at demodulator the DMMB-T program in the program stream is received when receiving DMMB stream.Can obtain the ID tabulation and the type of DMMB program by reception (PID is 0 * 19) to the table of HSMT wherein.The cited service lists of terminal will be made up of the content in this table.
For the DMMB-T program, its type is fixed as the MPEG-TS type, and is identical with common mpeg program receiving course to its receiving course, and follows digital video broadcasting Chinese business information standard.
For the program of DMMB-H, may there be three kinds of possible type: MPEG-TS, IP MPE and DMMB-IP:
The MPEG-TS type is indicated the data fit MPEG standard of being transmitted in this DMMB-H channel, can receive (promptly meeting the SI standard) by the receiving course of standard.Wherein Fu Wu location is specified by the Linkage descriptor in the HSMT table.
It is the MPE data that IP MPE type is indicated the data of being transmitted in this channel, and its positioning service is finished by the MPE_stream_location_descriptor in the circulation of HSMT table descriptor.
What the DMMB-IP type was indicated this channel employing is the IP stream mode, and the IP data can directly obtain after the terminal demodulation module.
Claims (9)
1, a kind of data encapsulation and transmission method of Digital Television is characterized in that may further comprise the steps:
The mapping table that in transmitting data stream, adds descriptor.
2, the data encapsulation and transmission method of Digital Television according to claim 1 is characterized in that: be applied to DMMB-T, each the MPEG-TS bag in the input TS stream is directly transmitted without any processing.
3, the data encapsulation and transmission method of Digital Television according to claim 1 is characterized in that: be applied to DMMB-H, inlet flow transmits by dual mode, DMMB-HIP stream mode and DVB compliant stream mode.
4, the data encapsulation and transmission method of Digital Television according to claim 3, it is characterized in that: described DMMB-H IP stream mode, input IP stream is encapsulated as the DMMB-IP bag, and in addition additional 4 bytes form the class TS pack arrangement of one 188 byte on the data of every group 184 byte; When being input as above 1 IP stream, each IP stream is encapsulated as the DMMB-IP bag of series; Being re-used into from the bag that each IP flows and DMMB-T stream is imported, DMMB flows.
5, the data encapsulation and transmission method of Digital Television according to claim 3 is characterized in that: described class TS pack arrangement comprises sync_byte, transport_error_indicator, payload_unit_start_indictor, transport_priority, PID, reserved_bit, H_prog_id parameter.
6, the data encapsulation and transmission method of Digital Television according to claim 5 is characterized in that: described sync_byte takies 8 bit fields, transport_error_indicator and takies 1 bit field, payload_unit_start_indictor and take 1 bit field, transport_priority and take 1 bit field, PID and take that 13 bit fields, reserved_bit take 2 bit fields, H_prog_id takies 6 bit fields.
7, the data encapsulation and transmission method of Digital Television according to claim 1, it is characterized in that: described mapping table is cut into is engaged in describing section, the business description section is packaged into the TS bag that PID is 0X0019, at the stream of DMMB-T or H_prog_id be 1 DMMB-H stream the two one of or transmit simultaneously.
8, the data encapsulation and transmission method of Digital Television according to claim 7 is characterized in that: described business description section comprises table identifier, section grammer designator, segment length, transport stream identification symbol, version information, current follow-up designator, segment number, last segment number, original network identification symbol, hand-held program ID number, hand-held program category, descriptor length of the cycle, CRC.
9, the data encapsulation and transmission method of Digital Television according to claim 8 is characterized in that: described table identifier takies 8 bit fields, the Duan Yufa designator takies 1 bit field, segment length takies 12 bit fields, the transport stream identification symbol takies 16 bit fields, version information takies 5 bit fields, current follow-up designator takies 1 bit field, segment number takies 8 bit fields, last segment number takies 8 bit fields, the original network identification symbol takies 16 bit fields, take 6 bit fields hand-held program ID number, hand-held program category takies 8 bit fields, the descriptor length of the cycle takies 12 bit fields, CRC takies 32 bit fields.
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| CNA2007100728095A CN101009828A (en) | 2007-01-05 | 2007-01-05 | Data encapsulation and transmission method of the digital TV |
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| CNA2007100728095A CN101009828A (en) | 2007-01-05 | 2007-01-05 | Data encapsulation and transmission method of the digital TV |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102769799A (en) * | 2011-05-03 | 2012-11-07 | 朱佩江 | Method and system for realizing digital television business distribution service in IP (internet protocol) network |
| CN105025352A (en) * | 2015-07-21 | 2015-11-04 | 深圳市茁壮网络股份有限公司 | Digital television channel data packaging method and rapid searching method |
-
2007
- 2007-01-05 CN CNA2007100728095A patent/CN101009828A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102769799A (en) * | 2011-05-03 | 2012-11-07 | 朱佩江 | Method and system for realizing digital television business distribution service in IP (internet protocol) network |
| CN105025352A (en) * | 2015-07-21 | 2015-11-04 | 深圳市茁壮网络股份有限公司 | Digital television channel data packaging method and rapid searching method |
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Open date: 20070801 |