ETSI EN 301 192 V1.4.1：2004年数字视频广播数据传输标准

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ETSI EN 301 192 是欧洲电信标准 institute (ETSI) 发布的一项重要标准，版本 1.4.1 于 2004 年 6 月更新。这个标准专门针对数字视频广播 (DVB) 的数据广播技术进行了详细规定，适用于广播、数据传输、数字化和多媒体领域，特别是与 MPEG（Moving Picture Experts Group）相关的视频编码技术。它是由欧洲广播联盟 (EBU) 和 UER ETSI 联合制定的，旨在确保欧洲范围内的数字电视服务质量和一致性。标准编号 REN/JTC-DVB-157 表明，它是 DVB 技术系列中的一个关键参考文档，关键词包括“广播”、“数据”、“数字”、“DVB”和“MPEG”。ETSI EN 301 192 V1.4.1 的发布体现了对多媒体内容分发技术的标准化，尤其是在视频广播中，对于提高效率、减少干扰以及保障服务质量有着至关重要的作用。该标准文档是欧洲广播领域的官方指南，用户可以通过 ETSI 的官方网站 <http://www.etsi.org> 下载个人副本。值得注意的是，如果存在不同电子版本或印刷版本之间的差异，官方参考版本应为 Portable Document Format (PDF)。在遇到争议时，以 ETSI 秘书处特定网络驱动器上保存的 PDF 版本为准。作为一份注册的非营利协会的出版物，ETSI EN 301 192 V1.4.1 提供了关于数据广播的具体技术规范，包括信道编码、解码、服务质量(QoS)控制、内容分发策略等方面的规定，以确保所有参与者能够按照统一的标准进行操作。对于任何从事数字电视、多媒体传输或接收设备制造商的工程师和技术人员来说，理解和遵循此标准都是至关重要的，因为它直接影响到产品的兼容性、性能和市场的准入。这份标准在推动欧洲乃至全球范围内数字广播技术的发展和标准化进程中扮演着核心角色。

ETSI

inal draft ETSI EN 301 192 V1.4.1 (2004

The data_identifier field shall be set to the same value for each PES packet conveying data in the same data stream.

sub_stream_id: This is an 8-bit field. Its use is user private.

PTS_extension_flag: This is a 1-bit field. It shall be set to "1" for synchronous data streams. For synchronized data

streams a value of "1" indicates the presence of the PTS_extension field in the PES_data_packet. If the PTS_extension

field is not present for synchronized data streams, this flag shall be set to "0".

output_data_rate_flag: This is a 1-bit field. It shall be set to "0" for synchronized data streams. For synchronous data

streams a value of "1" indicates the presence of the output_rate field in the PES_data_packet. If the output_rate field is

not present for synchronous data streams, this flag shall be set to "0".

PES_data_packet_header_length: This is a 4-bit field. It shall specify the length of the optional fields in the packet

header including the PES_data_private_data_bytes.

PTS_extension: This is a 9-bit field. This field extends the PTS conveyed in the PES header of this PES packet. This

field contains the 9-bit Program Clock Reference (PCR) extension as defined in MPEG-2 Systems

(see ISO/IEC 13818-1 [1]) that extends the time resolution of data PTS's (synchronous or synchronized) from the

MPEG-2 standard resolution of 11,1 µs (90 kHz) to 37 ns (27 MHz).

output_data_rate: This is a 28-bit field that shall indicate the bit rate of the regenerated signal for a synchronous data

stream. The output data rate is encoded as a 28-bit positive integer.

PES_data_private_data_byte: The use of these bytes is service specific. DVB compliant receivers may skip over

these bytes if present.

PES_data_byte: These bytes convey the data to be broadcast.

6.2 PSI and SI specifications

The data broadcast service shall indicate the use of a synchronous or synchronized data stream by including one of more

data_broadcast_descriptors in SI (see EN 300 468 [2]). Each descriptor shall be associated with a particular stream via a

component_tag identifier. In particular, the value of the component_tag field shall be identical to the value of the

component_tag field of a stream_identifier_descriptor (see EN 300 468 [2]) that may be present in the PSI program map

section for the stream that is used as a data stream.

6.2.1 Data_broadcast_descriptor

The data broadcast descriptor is used in the following way:

data_broadcast_id: This field shall be set to 0x0003 to indicate a synchronous data stream and to 0x0004 for

synchronized data streams (see TR 101 162 [3]).

component_tag: This field shall have the same value as a component_tag field of a stream_identifier_descriptor

(if present in the PSI program map section) for the stream on which the data is broadcast.

selector_length: This field shall be set to zero.

selector_byte: This field is not present.

6.2.2 Stream type

The presence of a synchronous data stream or a synchronized data stream in a service shall be indicated in the program

map section of that service by setting the stream type of that stream to the value of 0x06 or a user defined value.

ETSI

inal draft ETSI EN 301 192 V1.4.1 (2004

section_length: This field shall be set as defined by ISO/IEC 13818-6 [5].

MAC_address_[1..6]: This 48-bit field contains the MAC address of the destination. The MAC address is fragmented

in 6 fields of 8-bits, labelled MAC_address_1 to MAC_address_6. The MAC_address_1 field contains the most

significant byte of the MAC address, while MAC_address_6 contains the least significant byte. Figure 1 illustrates the

mapping of the MAC address bytes in the section fields.

NOTE: The order of the bits in the bytes is not reversed and that the Most Significant Bit (MSB) of each byte is

still transmitted first.

1 2 3 4 5 6

48-bit MAC address byte:

table

....

section

length

MAC

address

reserved

last

section

number

MAC

address

MAC

address

MAC

address

MAC

address

MAC

address

.... ....

section:

MSB LSB

Figure 1: Mapping of MAC address bytes to section fields

The MAC_address fields contain either a clear or a scrambled MAC address as indicated by the

address_scrambling_control field.

payload_scrambling_control: This 2-bit field defines the scrambling mode of the payload of the section. This includes

the payload starting after the MAC_address_1 but excludes the checksum or CRC32 field (see table 4). The scrambling

method applied is user private.

Table 4: Coding of the payload_scrambling_control field

value payload scrambling control

00 unscrambled

01 defined by service

10 defined by service

11 defined by service

address_scrambling_control: This 2-bit field defines the scrambling mode of MAC address in this clause (see table 5).

This field enables a dynamic change of MAC addresses. The scrambling method applied is user private.

Table 5: Coding of the address_scrambling_control field

value address scrambling control

00 unscrambled

01 defined by service

10 defined by service

11 defined by service

LLC_SNAP_flag: This is a 1-bit flag. If this flag is set to "1" the payload carries an LLC/SNAP encapsulated datagram

following the MAC_address_1 field. The LLC/SNAP structure shall indicate the type of the datagram conveyed. If this

flag is set to "0", the section shall contain an IP datagram without LLC/SNAP encapsulation.

current_next_indicator: This is a 1-bit field. It shall be set to a value of "1".

section_number: This is an 8-bit field. If the datagram is carried in multiple sections, then this field indicates the

position of the section within the fragmentation process. Otherwise it shall be set to zero.

last_section_number: This 8-bit field shall indicate the number of the last section that is used to carry the datagram,

i.e. the number of the last section of the fragmentation process.

ETSI

inal draft ETSI EN 301 192 V1.4.1 (2004

LLC_SNAP: This structure shall contain the datagram according to the ISO/IEC 8802-2 [12] Logical Link Control

(LLC) and ISO/IEC TR 8802-1 [11] a SubNetwork Attachment Point (SNAP) specifications. If the payload of the

section is scrambled (see payload_scrambling_mode), these bytes are scrambled.

IP_datagram_data_byte: These bytes contain the data of the datagram. If the payload of the section is scrambled

(see payload_scrambling_mode), these bytes are scrambled.

stuffing_byte: This is an optional 8-bit field whose value is not specified. If the payload of the section is scrambled

(see payload_scrambling_mode), these bytes are scrambled. They are to assist with block encryption and data

processing in wide bus environments. The number of stuffing_bytes used should meet the data alignment requirements

defined in the data_broadcast_descriptor.

checksum: This field shall be set as defined by ISO/IEC 13818-6 [5]. It is calculated over the entire datagram_section.

CRC_32: This field shall be set as defined by ISO/IEC 13818-6 [5]. It is calculated over the entire datagram_section.

7.2 MPE PSI and SI specifications

The data broadcast service shall indicate the transmission of datagrams by including one or more data broadcast

descriptors in SI (see EN 300 468 [2] and TR 101 162 [3]). Each descriptor shall be associated with a stream via a

component_tag identifier. In particular, the value of the component_tag field shall be identical to the value of the

component_tag field of a stream_identifier_descriptor (see EN 300 468 [2]) that may be present in the PSI program map

table for the stream that is used to transmit the datagrams.

7.2.1 Data_broadcast_descriptor

The data broadcast descriptor is used in the following way:

data_broadcast_id: This field shall be set to 0x0005 to indicate the use of the multiprotocol encapsulation

specification (see also TR 101 162 [3]).

component_tag: This field shall have the same value as a component_tag field of a stream_identifier_descriptor that

may be present in the PSI program map section for the stream on which the data is broadcast.

selector_length: This field shall be set to 0x02.

selector_byte: The selector bytes shall convey the multiprotocol_encapsulation_info structure which is defined in

table 6.

Table 6: Syntax for multiprotocol_encapsulation_info structure

Syntax Number of bits

Mnemonic

multiprotocol_encapsulation_info () {

MAC_address_range

3 uimsbf

MAC_IP_mapping_flag

1 bslbf

alignment_indicator

1 bslbf

reserved

3 bslbf

max_sections_per_datagram

8 uimsbf

}

The semantics of the multiprotocol_encapsulation_info structure are as follows:

MAC_address_range: This 3-bit field shall indicate the number of MAC address bytes that the service uses to

differentiate the receivers according to table 7.

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