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CN101690200B - Method and apparatus for providing high quality multimedia service in digital multimedia broadcasting system - Google Patents

Method and apparatus for providing high quality multimedia service in digital multimedia broadcasting system Download PDF

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Publication number
CN101690200B
CN101690200B CN2008800231475A CN200880023147A CN101690200B CN 101690200 B CN101690200 B CN 101690200B CN 2008800231475 A CN2008800231475 A CN 2008800231475A CN 200880023147 A CN200880023147 A CN 200880023147A CN 101690200 B CN101690200 B CN 101690200B
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Prior art keywords
base layer
enhancement layer
packet
layer
pes
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Expired - Fee Related
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CN2008800231475A
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Chinese (zh)
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CN101690200A (en
Inventor
金光勇
李光淳
尹正日
金永受
杨圭台
裵在辉
崔序米
金柱延
徐在贤
林钟秀
李寿寅
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Electronics and Telecommunications Research Institute ETRI
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Electronics and Telecommunications Research Institute ETRI
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    • H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
    • H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
    • H04N21/43074—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen of additional data with content streams on the same device, e.g. of EPG data or interactive icon with a TV program
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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Security & Cryptography (AREA)
  • Databases & Information Systems (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Television Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

A transmitting apparatus and a receiving apparatus for providing a high quality multimedia service in a Digital Multimedia Broadcasting (DMB) transmission system are provided. The transmission apparatus separates input multimedia content into a base layer elementary stream and an enhancement layer elementary stream, encodes the base layer elementary stream and the enhancement layer elementary stream, converts the base layer elementary stream and the enhancement layer elementary stream into a base layer SL packet and an enhancement layer SL packet, converts the base layer SL packet and the enhancement layer SL packet into a base layer PES packet and an enhancement layer PES packet, and multiplexes the base layer PES packet and the enhancement layer PES packet according to the base layer elementary stream and the enhancement layer elementary stream, and outputs a base layer TS packet and an enhancement layer TS packet.

Description

用于在数字多媒体广播系统中提供高质量多媒体服务的方法和设备Method and device for providing high-quality multimedia services in digital multimedia broadcasting system

技术领域 technical field

本发明涉及用于提供高质量多媒体服务的媒体处理方法和设备，利用所述方法和设备，向数字多媒体广播添加用于提供高质量服务的功能，并可维持与现有接收机的后向兼容性。The present invention relates to a media processing method and device for providing high-quality multimedia services, by using the method and device, functions for providing high-quality services are added to digital multimedia broadcasting, and backward compatibility with existing receivers can be maintained sex.

本发明源自于由信息通信部(MIC)的信息技术(IT)研究开发(R&D)计划支持的研究项目[2006-S-017-02，Development of High-Tech TerrestrialDMB Transmission]。The present invention arose out of a research project [2006-S-017-02, Development of High-Tech TerrestrialDMB Transmission] supported by the Information Technology (IT) Research and Development (R&D) Program of the Ministry of Information and Communications (MIC).

背景技术 Background technique

在传统数字多媒体广播(DMB)中，将多媒体服务多路复用为单一传输流并传送多路复用后的服务。在DMB广播中，通过单一流提供多媒体服务，并由此在提供高质量服务中存在限制。In conventional digital multimedia broadcasting (DMB), multimedia services are multiplexed into a single transport stream and the multiplexed services are delivered. In DMB broadcasting, multimedia services are provided through a single stream, and thus there is a limit in providing high-quality services.

附图说明 Description of drawings

图1是图示了数字多媒体广播(DMB)中的传统传送单元的媒体处理器的结构的框图；1 is a block diagram illustrating the structure of a media processor of a conventional transmission unit in Digital Multimedia Broadcasting (DMB);

图2是图示了根据本发明实施例的用于在DMB中提供高质量多媒体服务的系统的概念图；2 is a conceptual diagram illustrating a system for providing high-quality multimedia services in DMB according to an embodiment of the present invention;

图3是用于图示根据本发明一个实施例的在编码单元中执行的编码和多路复用方法的框图；3 is a block diagram illustrating an encoding and multiplexing method performed in an encoding unit according to one embodiment of the present invention;

图4是用于图示根据本发明另一实施例的在编码单元中执行的编码和多路复用方法的框图；4 is a block diagram illustrating an encoding and multiplexing method performed in an encoding unit according to another embodiment of the present invention;

图5是执行与图3中图示的编码和多路复用方法对应的解码和解多路复用方法的接收装置的框图；5 is a block diagram of a receiving device performing a decoding and demultiplexing method corresponding to the encoding and multiplexing method illustrated in FIG. 3;

图6是图示了根据本发明一个实施例的在解码单元中执行的解码和解多路复用方法的流程图；6 is a flowchart illustrating a decoding and demultiplexing method performed in a decoding unit according to one embodiment of the present invention;

图7是用于描述根据本发明另一实施例的在解码单元中执行的解码和解多路复用方法的框图；7 is a block diagram for describing a decoding and demultiplexing method performed in a decoding unit according to another embodiment of the present invention;

图8是图7中图示的解码和解多路复用方法的流程图；Figure 8 is a flowchart of the decoding and demultiplexing method illustrated in Figure 7;

图9图示了根据本发明另一实施例的解码和解多路复用方法；FIG. 9 illustrates a decoding and demultiplexing method according to another embodiment of the present invention;

图10图示了本发明中使用的MPEG-4对象描述符(OD)；Figure 10 illustrates the MPEG-4 Object Descriptor (OD) used in the present invention;

图11是根据本发明示范实施例的用于在DMB传送系统中提供高质量多媒体服务的传送装置的框图；和11 is a block diagram of a transmission device for providing high-quality multimedia services in a DMB transmission system according to an exemplary embodiment of the present invention; and

图12是根据本发明示范实施例的用于在DMB传送系统中提供高质量多媒体服务的接收装置的框图。FIG. 12 is a block diagram of a receiving device for providing a high-quality multimedia service in a DMB delivery system according to an exemplary embodiment of the present invention.

发明内容 Contents of the invention

技术问题technical problem

本发明提供了一种收发方法和设备，利用所述方法和设备，向数字多媒体广播添加用于提供高质量服务的功能，并可维持与现有接收机的后向兼容性。The present invention provides a method and device for sending and receiving, by using the method and device, the function for providing high-quality service is added to digital multimedia broadcasting, and the backward compatibility with existing receivers can be maintained.

技术方案Technical solutions

本发明提供了一种结构，其中将传输流(TS)分离为基础层TS和增强层TS，经由基础层TS传送传统TS，并用于高质量服务的附加多媒体服务信息被多路复用并经由增强层TS传送，使得通过不同传输信道传送的服务可彼此合并，并在需要时提供。The present invention provides a structure in which a transport stream (TS) is separated into a base layer TS and an enhancement layer TS, a legacy TS is transmitted via the base layer TS, and additional multimedia service information for high-quality service is multiplexed and sent via The enhancement layer TS is delivered so that services delivered through different transport channels can be combined with each other and provided as needed.

具体来说，当将分级调制功能给予数字多媒体广播(DMB)传送系统以便将传送机制划分为基础层和增强层时，可将基本质量多媒体服务提供到例如手机的低规格(low-spec)终端，而可将高质量多媒体服务提供到高规格(high-spec)终端。Specifically, when a hierarchical modulation function is given to a Digital Multimedia Broadcasting (DMB) transmission system to divide the transmission mechanism into a base layer and an enhancement layer, basic-quality multimedia services can be provided to low-spec terminals such as mobile phones , and high-quality multimedia services can be provided to high-spec (high-spec) terminals.

有利效果beneficial effect

本发明提出了用于在数字多媒体广播(DMB)中提供高质量多媒体服务的设备和方法，利用所述设备和方法，向DMB添加用于提供高质量服务的功能，并且与传统DMB网络的兼容性是可能的，使得可在甚至没有特定机器改变的情况下、利用传统DMB网络维持预定质量。The present invention proposes a device and method for providing high-quality multimedia services in digital multimedia broadcasting (DMB), using the device and method, adding functions for providing high-quality services to DMB, and compatible with traditional DMB networks Resiliency is possible so that a predetermined quality can be maintained with conventional DMB networks even without specific machine changes.

最佳模式best mode

根据本发明的一个方面，提供了一种用于在DMB(数字多媒体广播)传送系统中提供高质量多媒体服务的传送装置，该传送装置包括：编码单元，用于将输入多媒体内容分离为基础层ES(基本流)和增强层ES，并对所述基础层ES和增强层ES分别进行编码；SL(同步层)打包变换单元，用于将所述基础层ES和增强层ES分别变换为基础层SL分组和增强层SL分组；PES(节目特定信息)打包变换单元，用于将所述基础层SL分组和增强层SL分组分别变换为基础层PES分组和增强层PES分组；和TS(传输流)多路复用单元，用于根据基础层ES和增强层ES对所述基础层PES分组和增强层PES分组分别进行多路复用，并输出基础层TS分组和增强层TS分组。According to one aspect of the present invention, there is provided a transmission device for providing high-quality multimedia services in a DMB (Digital Multimedia Broadcasting) transmission system, the transmission device comprising: an encoding unit for separating input multimedia content into base layers ES (basic stream) and enhancement layer ES, and encode the base layer ES and enhancement layer ES respectively; Layer SL grouping and enhancement layer SL grouping; PES (Program Specific Information) packet conversion unit for converting the base layer SL grouping and enhancement layer SL grouping into base layer PES grouping and enhancement layer PES grouping; and TS (transmission A stream) multiplexing unit, configured to multiplex the base layer PES packet and the enhancement layer PES packet respectively according to the base layer ES and the enhancement layer ES, and output the base layer TS packet and the enhancement layer TS packet.

根据本发明的另一方面，提供了一种用于在DMB传送系统中提供高质量多媒体服务的接收装置，该接收装置包括：质量选择单元，用于确定要接收仅基础层流还是要接收基础层流和增强层流两者；解码单元，用于对基础层流和增强层流分别进行解码，并分别输出基础层TS分组和增强层TS分组；TS解多路复用单元，用于对所述基础层和增强层TS分组分别进行解多路复用，以便分别获得基础层PES分组和增强层PES分组；PES解包变换单元，用于对所述基础层和增强层PES分组分别进行解码，以便分别获得基础层SL分组和增强层SL分组；和SL解包变换单元，用于对所述基础层和增强SL分组分别进行多路复用，以便获得基础层ES和增强层ES。According to another aspect of the present invention, there is provided a receiving device for providing high-quality multimedia services in a DMB transmission system, the receiving device includes: a quality selection unit for determining whether to receive only the base layer stream or to receive the base layer stream Both the layer stream and the enhancement layer stream; a decoding unit for decoding the base layer stream and the enhancement layer stream respectively, and outputting the base layer TS packet and the enhancement layer TS packet respectively; a TS demultiplexing unit for demultiplexing The base layer and enhancement layer TS packets are respectively demultiplexed to obtain base layer PES packets and enhancement layer PES packets respectively; the PES unpacking transformation unit is used to perform demultiplexing on the base layer and enhancement layer PES packets respectively decoding to obtain a base layer SL packet and an enhancement layer SL packet respectively; and an SL unpacking transformation unit for multiplexing the base layer and enhancement SL packets respectively to obtain a base layer ES and an enhancement layer ES.

根据本发明的另一方面，提供了一种用于在DMB传送系统中提供高质量多媒体服务的传送方法，该传送方法包括：将输入多媒体内容分离为基础层ES和增强层ES，并对所述基础层ES和增强层ES进行编码；将所述基础层ES和增强层ES变换为基础层SL分组和增强层SL分组；将所述基础层SL分组和增强层SL分组变换为基础层PES分组和增强层PES分组；和根据基础层ES和增强层ES对所述基础层PES分组和增强层PES分组进行多路复用，并输出基础层TS分组和增强层TS分组。According to another aspect of the present invention, there is provided a transmission method for providing high-quality multimedia services in a DMB transmission system, the transmission method comprising: separating input multimedia content into a base layer ES and an enhancement layer ES, and Encoding the base layer ES and enhancement layer ES; converting the base layer ES and enhancement layer ES into base layer SL packets and enhancement layer SL packets; converting the base layer SL packets and enhancement layer SL packets into base layer PES packetizing and enhancement layer PES packets; and multiplexing the base layer PES packets and enhancement layer PES packets according to the base layer ES and enhancement layer ES, and outputting the base layer TS packets and enhancement layer TS packets.

根据本发明的另一方面，提供了一种用于在DMB传送系统中提供高质量多媒体服务的接收方法，该接收方法包括：质量选择操作，用于确定要接收仅基础层流还是要接收基础层流和增强层流两者；解码操作，用于对基础层流和增强层流进行解码，并输出基础层TS分组和增强层TS分组；TS解多路复用操作，用于对所述基础层和增强层TS分组进行解多路复用，以便获得基础层PES分组和增强层PES分组；PES解包变换操作，用于对所述基础层和增强层PES分组进行解码，以便获得基础层SL分组和增强层SL分组；和SL解包变换操作，用于对所述基础层和增强SL分组进行多路复用，以便获得基础层ES和增强层ES。According to another aspect of the present invention, there is provided a receiving method for providing high-quality multimedia services in a DMB delivery system, the receiving method includes: a quality selection operation for determining whether to receive only the base layer stream or to receive the base layer stream Both the layer stream and the enhancement layer stream; a decoding operation for decoding the base layer stream and the enhancement layer stream, and outputting base layer TS packets and enhancement layer TS packets; a TS demultiplexing operation for demultiplexing the Base layer and enhancement layer TS packets are demultiplexed to obtain base layer PES packets and enhancement layer PES packets; PES depacketization operations are used to decode said base layer and enhancement layer PES packets to obtain base layer PES packets a layer SL packet and an enhancement layer SL packet; and an SL depacketization operation for multiplexing said base layer and enhancement SL packets to obtain a base layer ES and an enhancement layer ES.

具体实施方式 Detailed ways

现在将参考附图来解释本发明的优选实施例。图中的相同附图标记或符号表示相同元件。为了阐明本发明的精神，可省略公知功能或构造的描述。Preferred embodiments of the present invention will now be explained with reference to the accompanying drawings. The same reference numerals or symbols in the figures denote the same elements. Descriptions of well-known functions or constructions may be omitted to clarify the spirit of the present invention.

图1是图示了数字多媒体广播(DMB)中的传统传送单元的媒体处理器的结构的框图。FIG. 1 is a block diagram illustrating the structure of a media processor of a conventional transmission unit in Digital Multimedia Broadcasting (DMB).

视频编码器根据视频标准对进入图像信号进行编码，而音频编码器对进入音频信号进行编码。A video encoder encodes an incoming image signal according to a video standard, and an audio encoder encodes an incoming audio signal.

初始对象描述符(IOD)发生器110生成基于ISO/IEC 14496-1标准的IOD数据。对象描述符(OD)/BIFS(用于场面的二进制格式)发生器120生成基于ISO/IEC 14496-1标准的OD/BIFS流。An initial object descriptor (IOD) generator 110 generates IOD data based on the ISO/IEC 14496-1 standard. An Object Descriptor (OD)/BIFS (Binary Format for Scenes) generator 120 generates an OD/BIFS stream based on the ISO/IEC 14496-1 standard.

SL打包器130(SL-同步层)生成作为用于进入媒体流之间的同步的分组的SL分组，并遵循ISO/IEC 14496-1系统标准。换言之，SL打包器130接收OD/BIFS流、视频基本流(ES)、音频ES、和附加数据，并生成分别与OD/BIFS流、视频ES、音频ES、和附加数据对应的OD/BIFS SL分组、视频SL分组、音频SL分组、和附加数据分组。The SL packetizer 130 (SL-Synchronization Layer) generates SL packets as packets for synchronization between incoming media streams, and follows the ISO/IEC 14496-1 system standard. In other words, the SL packetizer 130 receives the OD/BIFS stream, video elementary stream (ES), audio ES, and additional data, and generates OD/BIFS SL corresponding to the OD/BIFS stream, video ES, audio ES, and additional data, respectively packets, video SL packets, audio SL packets, and additional data packets.

部分(section)发生器(或PSI发生器140)(PSI-节目特定信息)生成包括接收的IOD/OD/BIFS的部分，并遵循ISO/IEC 13818-1标准。部分发生器140包括14496部分打包单元，用于将SL分组(即，OD/BIFS SL分组)打包为14496部分，并包括PSI打包单元，用于生成包括IOD数据的PSI信息。A section generator (or PSI generator 140) (PSI - Program Specific Information) generates a section including received IOD/OD/BIFS and follows the ISO/IEC 13818-1 standard. The part generator 140 includes a 14496 part packing unit for packing SL packets (i.e., OD/BIFS SL packets) into 14496 parts, and a PSI packing unit for generating PSI information including IOD data.

PES打包器150(PES-节目基本流)接收SL分组并对其进行PES打包，并遵循ISO/IEC 13818-1标准。传输流(TS)多路复用器160从部分发生器140和PES打包器150分别接收该部分和作为PES打包的结果的PES分组，并将所述部分和PES分组多路复用为MPEG-2TS。The PES packetizer 150 (PES-Program Elementary Stream) receives SL packets and PES packets them, and follows the ISO/IEC 13818-1 standard. Transport Stream (TS) multiplexer 160 receives the part and PES packets as a result of PES packetization from part generator 140 and PES packetizer 150, respectively, and multiplexes the parts and PES packets into MPEG- 2TS.

图2是图示了根据本发明实施例的用于在DMB中提供高质量多媒体服务的系统的概念图.2 is a conceptual diagram illustrating a system for providing high-quality multimedia services in DMB according to an embodiment of the present invention.

在传统多媒体广播中，多媒体服务被多路复用并通过单一传输流传送。然而，在本发明中，将分级调制功能给予DMB传送系统，使得将TS分离为基础层TS和增强层TS，并由此将传统TS作为基础层TS传送，并在增强层TS中传送用于高质量服务的附加多媒体服务信息。In traditional multimedia broadcasting, multimedia services are multiplexed and delivered through a single transport stream. However, in the present invention, a hierarchical modulation function is given to the DMB transmission system so that the TS is separated into the base layer TS and the enhancement layer TS, and thus the legacy TS is transmitted as the base layer TS and transmitted in the enhancement layer TS for Additional multimedia service information for high-quality services.

所以，可将基本质量多媒体服务提供到例如手机的低规格终端，并可将高质量多媒体服务提供到高规格终端。Therefore, a basic quality multimedia service can be provided to a low specification terminal such as a mobile phone, and a high quality multimedia service can be provided to a high specification terminal.

编码单元包括高质量视频编码器210、高质量音频编码器220、和附加数据编码器230。The encoding unit includes a high-quality video encoder 210 , a high-quality audio encoder 220 , and an additional data encoder 230 .

高质量视频编码器210可以是可伸缩视频编码器、立体3D视频编码器、多视点视频编码器、多声道音频编码器等。高质量视频编码器210将输入流分离为基础层视频ES 211和增强层视频ES 212，并将基础层视频ES 211和增强层视频ES 212输出到媒体系统编码和多路复用单元240。媒体系统编码和多路复用单元240对基础层视频ES 211和增强层视频ES 212进行多路复用。The high-quality video encoder 210 may be a scalable video encoder, a stereoscopic 3D video encoder, a multi-view video encoder, a multi-channel audio encoder, and the like. The high-quality video encoder 210 separates the input stream into a base layer video ES 211 and an enhancement layer video ES 212, and outputs the base layer video ES 211 and the enhancement layer video ES 212 to the media system encoding and multiplexing unit 240. Media system encoding and multiplexing unit 240 multiplexes base layer video ES 211 and enhancement layer video ES 212.

类似地，高质量音频编码器220将输入流分离为基础层音频ES和增强层音频ES，并将基础层音频ES和增强层音频ES输出到媒体系统编码和多路复用单元240。媒体系统编码和多路复用单元240对基础层音频ES和增强层音频ES进行多路复用。类似地，附加数据编码器230将输入流分离为基础层数据ES和增强层数据ES，并将基础层数据ES和增强层数据ES输出到媒体系统编码和多路复用单元240。媒体系统编码和多路复用单元240对基础层数据ES和增强层数据ES进行多路复用。Similarly, the high-quality audio encoder 220 separates an input stream into a base layer audio ES and an enhancement layer audio ES, and outputs the base layer audio ES and the enhancement layer audio ES to the media system encoding and multiplexing unit 240 . The media system encoding and multiplexing unit 240 multiplexes the base layer audio ES and the enhancement layer audio ES. Similarly, the additional data encoder 230 separates the input stream into base layer data ES and enhancement layer data ES, and outputs the base layer data ES and enhancement layer data ES to the media system encoding and multiplexing unit 240 . The media system encoding and multiplexing unit 240 multiplexes the base layer data ES and the enhancement layer data ES.

媒体系统编码和多路复用单元240将从高质量视频编码器210、高质量音频编码器220和附加数据编码器230分别接收的视频、音频和数据ES中的每一个多路复用为基础层和增强层。由此，传送单元250可经由同一信道或不同信道传送多路复用后的视频、音频和数据ES。The media system encoding and multiplexing unit 240 multiplexes each of the video, audio, and data ES respectively received from the high-quality video encoder 210, the high-quality audio encoder 220, and the additional data encoder 230 based on layers and enhancement layers. Thus, the transmission unit 250 may transmit the multiplexed video, audio and data ES via the same channel or different channels.

解码单元包括高质量视频解码器、高质量音频解码器、接收单元、以及媒体系统解码和解多路复用单元260。The decoding unit includes a high-quality video decoder, a high-quality audio decoder, a receiving unit, and a media system decoding and demultiplexing unit 260 .

图3和4图示了为了在DMB中提供高质量多媒体服务而提出的、在图2中图示的编码单元中执行的媒体系统编码和多路复用方法的实施例。图5是执行与图3中图示的编码和多路复用方法对应的解码和解多路复用方法的接收装置的框图。图6和7图示了根据本发明实施例的为了在DMB中提供高质量多媒体服务而在解码单元中执行的解码和解多路复用方法。图8是图示了图7中图示的解码和解多路复用方法的流程图。图9图示了根据本发明另一实施例的解码和解多路复用方法。3 and 4 illustrate embodiments of media system encoding and multiplexing methods performed in the encoding unit illustrated in FIG. 2 , proposed to provide high-quality multimedia services in DMB. FIG. 5 is a block diagram of a receiving device performing a decoding and demultiplexing method corresponding to the encoding and multiplexing method illustrated in FIG. 3 . 6 and 7 illustrate decoding and demultiplexing methods performed in a decoding unit in order to provide a high-quality multimedia service in a DMB according to an embodiment of the present invention. FIG. 8 is a flowchart illustrating the decoding and demultiplexing method illustrated in FIG. 7 . FIG. 9 illustrates a decoding and demultiplexing method according to another embodiment of the present invention.

图3是根据本发明一个实施例的在图2中图示的编码单元中的媒体系统编码和多路复用单元的框图。FIG. 3 is a block diagram of a media system encoding and multiplexing unit among the encoding units illustrated in FIG. 2 according to one embodiment of the present invention.

在图2的媒体系统编码和多路复用单元240中，SL打包器310从高质量视频编码器210、高质量音频编码器220、和附加数据编码器230中的每一个接收基础层ES和增强层ES，并将接收的基础层ES和增强层ES变换为基础层SL分组和增强层SL分组。In the media system encoding and multiplexing unit 240 of FIG. 2 , the SL packetizer 310 receives the base layer ES and enhancement layer ES, and transform the received base layer ES and enhancement layer ES into base layer SL packets and enhancement layer SL packets.

SL打包器310按照与图1的SL打包器130对视频、音频和数据流进行同步的方式类似的方式，来使得用于基础层的流(即，视频、音频和数据ES)和用于增强层的对应流(即，视频、音频和数据ES)同步。例如，为了在SL打包器310中执行该同步，基于从相同系统时间时钟(STC)推导(infer)的相同OCR(对象时钟基准)，而在流中插入例如复合时间戳(CTS)的时间戳信息。The SL packetizer 310 makes the streams for the base layer (i.e., video, audio, and data ES) and the streams for the enhancement The corresponding streams of the layers (ie, video, audio and data ES) are synchronized. For example, to perform this synchronization in the SL packetizer 310, a timestamp such as a composite timestamp (CTS) is inserted in the stream based on the same OCR (Object Clock Reference) inferred from the same System Time Clock (STC) information.

PES打包器320按照与图1的SL打包器130中使用的方式相同或类似的方式，来对接收的SL分组进行PES打包，并基于同一系统时钟在基础层ES和增强层ES中插入例如呈现时间戳(PTS)的时间戳，以便执行同步。PES packetizer 320 performs PES packetization on received SL packets in the same or similar manner as that used in SL packetizer 130 of FIG. The timestamp of the timestamp (PTS) in order to perform synchronization.

对于基础层流和增强层流存在一对IOD发生器350和351、一对OD/BIFS发生器360和361、以及一对部分发生器370和371中的每一对，并且每一对生成基础层流和增强层流。Each of a pair of IOD generators 350 and 351, a pair of OD/BIFS generators 360 and 361, and a pair of partial generators 370 and 371 exist for the base layer stream and the enhancement layer stream, and each pair generates a base Laminar and enhanced laminar flow.

与图1中图示的包括单一TS多路复用器160的传统媒体系统编码和多路复用单元形成对比的是，图3的媒体系统编码和多路复用单元包括两个TS多路复用器，即，基础层TS多路复用器330和增强层TS多路复用器340。图3的媒体系统编码和多路复用单元根据基础层和增强层对打包的PES流和PSI部分/14496部分流进行多路复用。In contrast to the conventional media system encoding and multiplexing unit illustrated in FIG. 1 comprising a single TS multiplexer 160, the media system encoding and multiplexing unit of FIG. 3 comprises two TS multiplexers 160 multiplexers, that is, a base layer TS multiplexer 330 and an enhancement layer TS multiplexer 340 . The media system encoding and multiplexing unit of Figure 3 multiplexes the packetized PES stream and the PSI part/14496 part stream according to the base layer and the enhancement layer.

这两个TS多路复用器330和340通过使用同一STC来生成基础层MPEG-2TS分组和增强层MPEG-2TS分组，并还通过使用同一STC来生成节目时钟基准(PCR)。同一STC的使用使得这两个TS能够在整个收发系统上同步。The two TS multiplexers 330 and 340 generate base layer MPEG-2 TS packets and enhancement layer MPEG-2 TS packets by using the same STC, and also generate a program clock reference (PCR) by using the same STC. The use of the same STC enables these two TSs to be synchronized across the transceiver system.

在该情况下，为了使得可通过在MPEG-2TS分组中插入PCR而生成的过剩(surplus)TS分组的增加最小化，可在按照相对小量和相对规则间隔生成的音频TS分组中插入PCR。因此，也可将PTS和OCR插入仅音频流中。In this case, in order to minimize an increase in surplus TS packets that can be generated by inserting PCRs in MPEG-2 TS packets, PCRs can be inserted in audio TS packets generated at relatively small amounts and at relatively regular intervals. Therefore, it is also possible to insert PTS and OCR into an audio-only stream.

最后，在适于基础层传送信道和增强传送信道的信道编码器中对多路复用后的基础层MPEG-2 TS分组和多路复用后的增强层MPEG-2 TS分组分别进行编码，并然后将它们分别传送到基础层传送信道和增强传送信道。当使用DMB中使用的分级调制方法时，可将基础层流和增强层流映射到单一码元中并传送到单一射频(RF)信道。Finally, the multiplexed base layer MPEG-2 TS packets and the multiplexed enhancement layer MPEG-2 TS packets are respectively encoded in a channel encoder adapted to the base layer transport channel and the enhanced transport channel, And then transmit them to the base layer transport channel and the enhanced transport channel respectively. When using the hierarchical modulation method used in DMB, the base layer stream and the enhancement layer stream can be mapped into a single symbol and transmitted to a single radio frequency (RF) channel.

在图3中图示的实施例中，通过传送仅由增强层所需的信息构造的PSI，可使得由于重复传送生成的不必要的传送分组的数目最小化。In the embodiment illustrated in FIG. 3 , by transmitting a PSI constructed of only information required by an enhancement layer, the number of unnecessary transmission packets generated due to repeated transmission can be minimized.

更具体地，在根据本发明实施例的构造基础层PSI信息380和增强层PSI信息381的方法中，没有改变地传送对应于现有技术的基础层PSI信息380，并且仅对于增强层添加的PMT/OD/BIFS信息被提取并被包括在增强层PSI信息381中。接收终端可通过使用基础层PSI信息380和增强层PSI信息381，来从这两层的MPEG-2TS中提取对应分组。More specifically, in the method of constructing the base layer PSI information 380 and the enhancement layer PSI information 381 according to the embodiment of the present invention, the base layer PSI information 380 corresponding to the prior art is transmitted unchanged, and only the enhancement layer added PMT/OD/BIFS information is extracted and included in enhancement layer PSI information 381 . The receiving terminal can extract corresponding packets from the MPEG-2 TS of the two layers by using the base layer PSI information 380 and the enhancement layer PSI information 381 .

在另一实施例中，没有改变地传送传统基础层PSI信息380，并且增强层PSI信息381包括通过向用于基础层的PMT/OD/BIFS信息添加用于增强层的信息而获得的扩展PMT/OD/BIFS信息。由此，接收终端可通过使用基础层PSI信息380和包括扩展PMT/OD/BIFS信息的增强层PSI信息381，来从这两层的MPEG-2TS中提取对应分组。In another embodiment, the legacy base layer PSI information 380 is conveyed unchanged, and the enhancement layer PSI information 381 includes an extended PMT obtained by adding information for the enhancement layer to the PMT/OD/BIFS information for the base layer /OD/BIFS information. Thus, the receiving terminal can extract corresponding packets from the MPEG-2 TS of both layers by using the base layer PSI information 380 and the enhancement layer PSI information 381 including extended PMT/OD/BIFS information.

根据本发明，当选择高质量服务的提供时，可仅通过增强层PSI信息的分析，来简单提供高质量服务，而无需分析基础层PSI信息。另外，通过不执行分析基础层PSI信息的处理，可简化提取增强层所需的信息的操作。According to the present invention, when the provision of the high-quality service is selected, the high-quality service can be simply provided only by analyzing the PSI information of the enhancement layer without analyzing the PSI information of the base layer. In addition, by not performing a process of analyzing PSI information of the base layer, the operation of extracting information required for the enhancement layer can be simplified.

图4是用于图示根据本发明另一实施例的在编码单元中执行的媒体系统编码和多路复用方法的框图。FIG. 4 is a block diagram illustrating a media system encoding and multiplexing method performed in an encoding unit according to another embodiment of the present invention.

图4中图示的媒体系统编码和多路复用方法与图3中图示的在同步方面相同，但是不同之处在于，基础层和增强层共享单一IOD发生器、单一OD/BIFS发生器、和部分发生器。The media system encoding and multiplexing method illustrated in Figure 4 is the same as that illustrated in Figure 3 in terms of synchronization, but differs in that the base and enhancement layers share a single IOD generator, a single OD/BIFS generator , and some generators.

根据当前实施例，作为从传送方传送的附加数据的IOD、OD和BIFS仅通过基础层传送，使得终端提取用于两层(即，基础层和增强层)的ES，并通过使用提取的ES来构造场面，由此增加传送效率。According to the current embodiment, IOD, OD, and BIFS, which are additional data transmitted from the transmitting party, are transmitted only through the base layer, so that the terminal extracts ESs for two layers (i.e., base layer and enhancement layer), and To construct the scene, thereby increasing the transmission efficiency.

换言之，由于作为这两层需要的相对小量数据的IOD、OD和BIFS仅通过单一信道(即，基础层信道)传送，所以可降低由于每一阶段中执行的打包生成的开销。In other words, since IOD, OD, and BIFS, which are relatively small amounts of data required by these two layers, are transmitted through only a single channel (ie, base layer channel), overhead generated due to packing performed in each stage can be reduced.

图5是根据本发明一个实施例的执行与图3中图示的编码和多路复用方法对应的解码和解多路复用方法的接收装置的框图。FIG. 5 is a block diagram of a receiving apparatus performing a decoding and demultiplexing method corresponding to the encoding and multiplexing method illustrated in FIG. 3 according to one embodiment of the present invention.

首先，由于分级调制等经由单一传送信道或不同传送信道接收的基础层流和增强层流由对应信道解码器解码。然后，基础层TS解多路复用器510将解码的基础层流划分为部分数据和PES流，并且增强层TS解多路复用器511将解码的增强层流划分为部分数据和PES流。First, base layer streams and enhancement layer streams received via a single transport channel or different transport channels due to hierarchical modulation or the like are decoded by corresponding channel decoders. Then, the base layer TS demultiplexer 510 divides the decoded base layer stream into partial data and PES streams, and the enhancement layer TS demultiplexer 511 divides the decoded enhancement layer stream into partial data and PES streams .

由于传送方已通过使用同一STC而在这两层的MPEG-2TS中插入PCR、使得PCR在每一MPEG-2TS中彼此连续，所以基础层TS解多路复用器510和增强层TS解多路复用器511中的仅一个提取PCR，并且当再现STC时，使用提取的PCR。在该情况下，为了使得两层之间的媒体再现同步，通过基于PCR缓存流缓冲区，这两层的MPEG-2TS应在经过基础层TS解多路复用器510和增强层TS解多路复用器511之前彼此同步。The base layer TS demultiplexer 510 and the enhancement layer TS demux Only one of the multiplexers 511 extracts PCRs, and when reproducing the STC, the extracted PCRs are used. In this case, in order to synchronize the media reproduction between the two layers, by buffering the stream buffer based on PCR, the MPEG-2 TS of the two layers should pass through the base layer TS demultiplexer 510 and the enhancement layer TS demultiplexer 510. The multiplexers 511 are previously synchronized with each other.

为了实现此，可基于在按照相对规则间隔传送的音频TS分组中插入的PCR的值，来实现从同一时间时钟推导的流之间的同步。To achieve this, synchronization between streams derived from the same time clock can be achieved based on the value of PCR inserted in audio TS packets transmitted at relatively regular intervals.

图6是图示了在图5的接收装置中执行的解码和解多路复用方法的流程图。FIG. 6 is a flowchart illustrating a decoding and demultiplexing method performed in the receiving device of FIG. 5 .

[选择提供基本服务的情况][Cases to choose to provide basic services]

现在将描述当用户选择仅提供基本服务时的信号的流程图。A flow chart of the signals when the user chooses to provide only basic services will now be described.

在操作S610和S611中，当使用现有MPEG-4系统编码的分组流被插入到MPEG-2TS中并传送时，从MPEG-2TS获得其中PID是0x0000的PAT(节目关联表)，以便存取被多路复用和传送的媒体数据。In operations S610 and S611, when a packet stream encoded using the existing MPEG-4 system is inserted into an MPEG-2TS and transmitted, a PAT (Program Association Table) in which the PID is 0x0000 is obtained from the MPEG-2TS for access Media data to be multiplexed and transmitted.

在操作S630中，解释PAT中包括的节目映射表(PMT)信息，以便从基础层TS搜索PMT。解释得到的PMT，以便提取示出了各种类型ES的标识符ES ID和分组标识符(PID)的关系表。In operation S630, program map table (PMT) information included in the PAT is interpreted to search for the PMT from the base layer TS. The resulting PMT is interpreted to extract a relational table showing identifiers ES ID and packet identifiers (PIDs) of various types of ESs.

在操作S640和S641到S644中，通过根据提取的关系表参考对应PID，而将不同类型TS分组彼此分离，并然后从每一分离的TS分组中提取ES信息。然后，解释ES信息中包括的OD，使得写入关于每一对象和每一ES的相关信息的列表。In operations S640 and S641 to S644, different types of TS packets are separated from each other by referring to the corresponding PID according to the extracted relationship table, and then ES information is extracted from each separated TS packet. Then, the OD included in the ES information is interpreted so that a list of related information about each object and each ES is written.

其后，在操作S670和S680中，解码视频或音频流，利用由于解码提取的相关信息来构造场面，并再现数据。Thereafter, in operations S670 and S680, the video or audio stream is decoded, a scene is constructed using related information extracted due to the decoding, and data is reproduced.

[选择提供高质量服务的情况][Select the case of providing high-quality services]

现在将描述当用户选择提供高质量服务时的信号的流程图。A flowchart of a signal when a user chooses to provide a high-quality service will now be described.

在操作S611和S621中，当用户选择提供高质量服务时，与基础层TS分组的初始提取同时地提取增强层TS分组，并初步(primarily)执行基础层TS分组和增强层TS分组之间的同步。In operations S611 and S621, when the user selects to provide a high-quality service, the enhancement layer TS packets are extracted simultaneously with the initial extraction of the base layer TS packets, and the interleaving between the base layer TS packets and the enhancement layer TS packets is primarily performed. Synchronize.

在操作S631和S650中，其中操作S650包括S651到S654，与当提供基本服务时执行的操作S640类似，解释在增强层TS分组中传送的PAT和PMT，并由此提取经由增强层信道传送的每一类型ES，并写入关于每一对象和每一ES的信息列表。In operations S631 and S650, wherein operation S650 includes S651 to S654, similar to operation S640 performed when basic services are provided, the PAT and PMT transmitted in the enhancement layer TS packets are interpreted, and thus the PAT and PMT transmitted via the enhancement layer channel are extracted. Each type ES, and write a list of information about each object and each ES.

在操作S661中，将来自基础层和增强层的提取的ES(例如，视频ES、音频ES、和数据ES)与有关提取的ES的相关信息组合起来。其后，在操作S670和S680中，视频和/或音频流被解码，并在再现数据之前构造场面。In operation S661, extracted ESs (eg, video ESs, audio ESs, and data ESs) from the base layer and the enhancement layer are combined with relevant information on the extracted ESs. Thereafter, in operations S670 and S680, the video and/or audio streams are decoded, and scenes are constructed before data is reproduced.

图7图示了当例如IOD、OD/BIFS等的信息被插入到比特流中并通过基础层和增强层之一传送时、根据本发明另一实施例的执行解码和解多路复用方法的接收装置。FIG. 7 illustrates the execution of a decoding and demultiplexing method according to another embodiment of the present invention when information such as IOD, OD/BIFS, etc. is inserted into a bitstream and transmitted through one of the base layer and the enhancement layer. receiving device.

图7中图示的接收装置中执行的解码和解多路复用方法对应于图4中图示的编码和多路复用方法。The decoding and demultiplexing method performed in the reception device illustrated in FIG. 7 corresponds to the encoding and multiplexing method illustrated in FIG. 4 .

图7中图示的接收装置与图5中图示的根据第一实施例的接收装置的不同之处在于，不包括用于解释增强层IOD和OD/BIFS信息的部分解释器，并将有关增强层的信息合并在用于基础层的PSI部分中并传送。因此，图7中图示的接收装置从基础层PSI部分提取增强层IOD和OD/BIFS信息，并将提取的信息传送到场面构造单元。The reception apparatus illustrated in FIG. 7 is different from the reception apparatus according to the first embodiment illustrated in FIG. The information of the enhancement layer is incorporated in the PSI part for the base layer and transmitted. Therefore, the reception device illustrated in FIG. 7 extracts the enhancement layer IOD and OD/BIFS information from the base layer PSI part, and transmits the extracted information to the scene construction unit.

图8是图示了在图7的接收装置中执行的解码和解多路复用方法的流程图。FIG. 8 is a flowchart illustrating a decoding and demultiplexing method performed in the receiving device of FIG. 7 .

当用户选择仅提供基本服务时，图8中图示的解码和解多路复用方法与图6中图示的相同。然而，当用户选择提供高质量服务时，图8中图示的解码和解多路复用方法与图6中图示的不同之处在于，仅对于基础层执行PMT和OD的解释，并基于所述解释来同时提取有关这两层的多条信息，并由此仅执行不同类型ES的合并。When the user chooses to provide only basic services, the decoding and demultiplexing methods illustrated in FIG. 8 are the same as those illustrated in FIG. 6 . However, when the user chooses to provide high-quality service, the decoding and demultiplexing method illustrated in FIG. 8 is different from that illustrated in FIG. The above explanation is used to simultaneously extract multiple pieces of information about these two layers, and thus only perform merging of different types of ESs.

在根据图8的另一实施例的解码和解多路复用方法中，基础层流之间的映射关系和增强层流之间的映射关系两者被添加到第一循环和第二循环，并在这里描述。接收终端通过使用添加的映射关系，来从基础层MPEG-2 TS和增强层MPEG-2 TS提取对应分组。In the decoding and demultiplexing method according to another embodiment of FIG. 8, both the mapping relationship between the base layer streams and the mapping relationship between the enhancement layer streams are added to the first loop and the second loop, and Described here. The receiving terminal extracts corresponding packets from the base layer MPEG-2 TS and the enhancement layer MPEG-2 TS by using the added mapping relationship.

另外，在图8的根据另一实施例的解码和解多路复用方法中，也仅通过基本层传送OD流，并将描述为构造场面的ES_Descriptor(ES_描述符)附加插入到基础层MPEG-2TS中，以便描述用于基础层的视频ES、音频ES和数据ES以及用于增强层的视频ES、音频ES和数据ES两者。In addition, in the decoding and demultiplexing method according to another embodiment of FIG. 8, the OD stream is also transmitted only through the base layer, and ES_Descriptor (ES_Descriptor) described as a construction scene is additionally inserted into the base layer MPEG - In 2TS in order to describe both video ES, audio ES and data ES for base layer and video ES, audio ES and data ES for enhancement layer.

如图6中图示的，为了使得可通过在MPEG-2TS分组中插入PCR而生成的过剩TS分组的增加最小化，可在按照相对小量和相对规则间隔生成的音频TS分组中插入PCR。因此，甚至可将PTS和OCR插入仅音频流中。As illustrated in FIG. 6 , in order to minimize an increase in excess TS packets that can be generated by inserting PCRs in MPEG-2 TS packets, PCRs can be inserted in audio TS packets generated in relatively small amounts and at relatively regular intervals. Thus, it is even possible to insert PTS and OCR into an audio-only stream.

图9图示了根据本发明另一实施例的解码和解多路复用方法。FIG. 9 illustrates a decoding and demultiplexing method according to another embodiment of the present invention.

PMT由两类循环构成，即第一和第二循环910和920。第一循环910由包括关于场面描述和对象描述的内容的ES_Descriptor构成，而第二循环920映射用于传送已在ES_Descriptor中描述的ES的MPEG-2TS分组的PID、Stream_type(流_类型)等。The PMT consists of two types of loops, first and second loops 910 and 920 . The first loop 910 is constituted by ES_Descriptor including contents about scene description and object description, and the second loop 920 maps PID, Stream_type (stream_type), etc. of MPEG-2 TS packets for transmitting ESs described in ES_Descriptor.

在上面结合图7和8描述的根据另一实施例的解码和解多路复用方法中，基础层流之间的映射关系和增强层流之间的映射关系两者被添加到这两个循环并在这里描述。接收装置通过使用添加的映射关系，来从基础层MPEG-2TS和增强层MPEG-2TS提取对应分组。In the decoding and demultiplexing method according to another embodiment described above in conjunction with FIGS. 7 and 8 , both the mapping relationship between base layer streams and the mapping relationship between enhancement layer streams are added to the two loops and described here. The receiving apparatus extracts corresponding packets from the base layer MPEG-2TS and the enhancement layer MPEG-2TS by using the added mapping relationship.

另外，在根据第二实施例的解码和解多路复用方法中，OD流也仅通过基础层信道传送，并且描述为构造场面的ES_Descriptor被附加插入到基础层MPEG-2 TS中，以便描述用于基础层的视频ES、音频ES和数据ES以及用于增强层的视频ES、音频ES和数据ES两者。Also, in the decoding and demultiplexing method according to the second embodiment, the OD stream is transmitted only through the base layer channel, and the ES_Descriptor described as a constructed scene is additionally inserted into the base layer MPEG-2 TS in order to describe Video ES, audio ES and data ES for the base layer and both video ES, audio ES and data ES for the enhancement layer.

图10图示了根据本发明实施例的MPEG-4OD。FIG. 10 illustrates MPEG-4OD according to an embodiment of the present invention.

基础层流和增强层流可被定义为不同OD。然而，在本实施例中，按照隶属(subordinate)关系在单一OD中包括用于基础层和增强的两个ES描述符。Base layer flow and enhancement layer flow can be defined as different ODs. However, in the present embodiment, two ES descriptors for base layer and enhancement are included in a single OD in subordinate relationship.

该隶属关系可使用MPEG-4ES描述符的“StreamDependanceFlag(流从属性标志)”和“dependsOn_ES_ID”来表达。使用URL_Flag(URL_标志)来指定ES的位置，以便表达ES自己存在于增强层中。This dependency relationship can be expressed using "StreamDependanceFlag (stream dependency flag)" and "dependsOn_ES_ID" of the MPEG-4ES descriptor. Use URL_Flag (URL_flag) to specify the location of the ES in order to express that the ES itself exists in the enhancement layer.

作为独立流的基础层流根据作为传统标准的AVC编解码器被设置为“ObjectTypeIndication(对象类型指示)＝0x21(AVC)，StreamType(流类型)＝0x04(可视流)”。作为从属流的增强层流根据SVC编解码器或多个其他编解码器中的任一个而被编码，并由此被设置为“ObjectTypeIndication＝0xC0(用户私有)，StreamType＝0x04(可视流)，StreamDependanceFlag＝1，dependsOn_ES_ID＝101(基础层ES_ID)”。The base layer stream which is an independent stream is set to "ObjectTypeIndication (object type indication) = 0x21 (AVC), StreamType (stream type) = 0x04 (visual stream)" according to the AVC codec which is a conventional standard. The enhancement layer stream, which is a dependent stream, is coded according to the SVC codec or any of a number of other codecs, and thus is set to "ObjectTypeIndication = 0xC0 (User Private), StreamType = 0x04 (Visual Stream) , StreamDependanceFlag=1, dependsOn_ES_ID=101 (base layer ES_ID)".

从属的基础层流在增强层而非基础层中的存在被表达为“URL_Flag＝1，URLstring[URLlength]＝xx(增强层的位置)”。The existence of the dependent base layer stream in the enhancement layer instead of the base layer is expressed as "URL_Flag=1, URLstring[URLlength]=xx (location of enhancement layer)".

因此，仅识别基础层的传统终端未能识别用于增强层的“ObjectTypeIndication”信息，并由此确保兼容性。根据本发明的用于高质量多媒体服务的终端识别从属流的存在和“ObjectTypeIndication”信息，并由此也正确接收增强层流。Therefore, a legacy terminal that recognizes only the base layer fails to recognize the 'ObjectTypeIndication' information for the enhancement layer, and thus ensures compatibility. The terminal for high-quality multimedia service according to the present invention recognizes the existence of the dependent stream and the 'ObjectTypeIndication' information, and thus also correctly receives the enhancement layer stream.

图11是根据本发明示范实施例的用于在DMB传送系统中提供高质量多媒体服务的传送装置1100的框图。FIG. 11 is a block diagram of a transmission device 1100 for providing high-quality multimedia services in a DMB transmission system according to an exemplary embodiment of the present invention.

传送装置1100包括编码单元1110、SL打包变换单元1120、PES打包变换单元1130、和TS多路复用单元1140。Transmission device 1100 includes encoding unit 1110 , SL packetization conversion unit 1120 , PES packetization conversion unit 1130 , and TS multiplexing unit 1140 .

编码单元1110将输入多媒体内容分离为基础层ES和增强层ES，并对基础层ES和增强层ES进行编码。The encoding unit 1110 separates input multimedia content into a base layer ES and an enhancement layer ES, and encodes the base layer ES and the enhancement layer ES.

SL打包变换单元1120将基础层ES和增强层ES变换为基础层SL分组和增强层SL分组，并执行基础层SL分组和增强层SL分组之间的同步。The SL packet transformation unit 1120 transforms the base layer ES and the enhancement layer ES into the base layer SL packet and the enhancement layer SL packet, and performs synchronization between the base layer SL packet and the enhancement layer SL packet.

PES打包变换单元1130将基础层SL分组和增强层SL分组变换为基础层PES分组和增强层PES分组，并执行基础层PES分组和增强层PES分组之间的同步。The PES packet conversion unit 1130 converts the base layer SL packet and the enhancement layer SL packet into the base layer PES packet and the enhancement layer PES packet, and performs synchronization between the base layer PES packet and the enhancement layer PES packet.

SL打包变换单元1120通过使用基于同一STC断定(ascertain)的OCR在基础层SL分组和增强层SL分组中插入时间戳信息，而执行同步。PES打包变换单元1130通过使用基于同一STC断定的PCR在基础层PES分组和增强层PES分组中插入时间戳信息，而执行同步。例如，SL打包变换单元1120插入CTS作为时间戳信息，而PES打包变换单元1130插入PTS作为时间戳信息。The SL packet conversion unit 1120 performs synchronization by inserting time stamp information in the base layer SL packet and the enhancement layer SL packet using OCR based on the same STC ascertain. The PES packetization conversion unit 1130 performs synchronization by inserting time stamp information in the base layer PES packet and the enhancement layer PES packet using the PCR predicated on the same STC. For example, the SL packet conversion unit 1120 inserts CTS as time stamp information, and the PES packet conversion unit 1130 inserts PTS as time stamp information.

TS多路复用单元1140根据基础层TS和增强层TS来对PES分组进行多路复用，以便生成TS分组。这时，TS多路复用单元1140通过根据基础层ES和增强层ES在TS分组中插入PCR或通过使用基础层ES和增强层ES中的相同STC，来执行同步。The TS multiplexing unit 1140 multiplexes the PES packets according to the base layer TS and the enhancement layer TS to generate TS packets. At this time, the TS multiplexing unit 1140 performs synchronization by inserting PCRs in TS packets according to the base layer ES and the enhancement layer ES or by using the same STC in the base layer ES and the enhancement layer ES.

图12是根据本发明示范实施例的用于在DMB传送系统中提供高质量多媒体服务的接收装置的框图。FIG. 12 is a block diagram of a receiving device for providing a high-quality multimedia service in a DMB delivery system according to an exemplary embodiment of the present invention.

该接收装置包括质量选择单元1210、解码单元1220、TS解多路复用单元1230、PES解包变换单元1240、和SL解包变换单元1250。The reception device includes a quality selection unit 1210 , a decoding unit 1220 , a TS demultiplexing unit 1230 , a PES depacketization conversion unit 1240 , and an SL depacketization conversion unit 1250 .

质量选择单元1210基于用户的选择确定要接收仅基础层流还是要接收基础层流和增强层流两者。The quality selection unit 1210 determines whether to receive only the base layer stream or to receive both the base layer stream and the enhancement layer stream based on the user's selection.

解码单元1220对基础层流和增强层流进行解码，以便获得TS分组。TS解多路复用单元1230对TS分组进行解多路复用，以便获得PES分组，并执行PES分组之间的同步。The decoding unit 1220 decodes the base layer stream and the enhancement layer stream to obtain TS packets. The TS demultiplexing unit 1230 demultiplexes TS packets to obtain PES packets, and performs synchronization between PES packets.

PES解包变换单元1240对该TS解多路复用单元1230所获得的PES分组进行解码以便获得SL分组，并执行SL分组之间的同步。SL解包变换单元1250根据基础层ES和增强层ES对SL分组进行多路复用。The PES depacketization transformation unit 1240 decodes the PES packets obtained by the TS demultiplexing unit 1230 to obtain SL packets, and performs synchronization between SL packets. The SL depacketization transformation unit 1250 multiplexes SL packets according to the base layer ES and the enhancement layer ES.

本发明也可实施为计算机可读记录介质上的计算机可读代码。计算机可读记录介质是可存储其后可由计算机系统读取的数据的任何数据存储装置。计算机可读记录介质的示例包括只读存储器(ROM)、随机存取存储器(RAM)、CD-ROM、磁带、软盘、光学数据存储装置、和载波(例如通过因特网的数据传送)。计算机可读记录介质也可通过与网络耦接的计算机系统分发，使得按照分布方式来存储和运行计算机可读代码。而且，计算机可读介质可在例如传感器节点的经由无线网络连接的嵌入系统中分发、存储和运行计算机可读代码。The present invention can also be embodied as computer readable codes on a computer readable recording medium. The computer readable recording medium is any data storage device that can store data which can be thereafter read by a computer system. Examples of the computer readable recording medium include read only memory (ROM), random access memory (RAM), CD-ROM, magnetic tapes, floppy disks, optical data storage devices, and carrier waves (such as data transfer via the Internet). The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion. Also, the computer readable medium can distribute, store and execute the computer readable codes in embedded systems connected via a wireless network, such as sensor nodes.

尽管已参考其优选实施例而具体示出和描述了本发明，但是本领域技术人员将理解的是，可在这里进行形式和细节的各种改变，而不脱离所附权利要求限定的本发明的精神和范围。优选实施例应仅按照描述的含义而不是为了限制的目的来考虑。所以，本发明的范围不由本发明的详细描述限定，而由所附权利要求限定，并且该范围内的所有差别将被解释为包括在本发明中。While the invention has been particularly shown and described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the invention as defined in the appended claims. spirit and scope. The preferred embodiments should be considered in a descriptive sense only and not for purposes of limitation. Therefore, the scope of the invention is defined not by the detailed description of the invention but by the appended claims, and all differences within the scope will be construed as being included in the present invention.

Claims (38)

1.一种用于在DMB(数字多媒体广播)传送系统中提供高质量多媒体服务的传送装置，该传送装置包括：1. A transmission device for providing high-quality multimedia services in a DMB (Digital Multimedia Broadcasting) transmission system, the transmission device comprising: 编码单元，用于将输入多媒体内容分离为基础层ES(基本流)和增强层ES；A coding unit for separating the input multimedia content into a base layer ES (Elementary Stream) and an enhancement layer ES; SL(同步层)打包变换单元，用于将该基础层ES和该增强层ES分别变换为基础层SL分组和增强层SL分组；SL (synchronization layer) packs and transforms unit, is used for transforming this base layer ES and this enhancement layer ES into base layer SL grouping and enhancement layer SL grouping respectively; PES(节目特定信息)打包变换单元，用于将所述基础层SL分组和增强层SL分组分别变换为基础层PES分组和增强层PES分组；和A PES (Program Specific Information) packet conversion unit, configured to convert the base layer SL packet and the enhancement layer SL packet into a base layer PES packet and an enhancement layer PES packet, respectively; and TS(传输流)多路复用单元，用于根据基础层ES和增强层ES对所述基础层PES分组和增强层PES分组分别进行多路复用，并输出基础层TS分组和增强层TS分组。A TS (transport stream) multiplexing unit, configured to multiplex the base layer PES packet and the enhancement layer PES packet respectively according to the base layer ES and the enhancement layer ES, and output the base layer TS packet and the enhancement layer TS grouping. 2.根据权利要求1的传送装置，其中该SL打包变换单元和该PES打包变换单元通过使用基于同一STC(系统时间时钟)断定的OCR(对象时钟基准)在所述基础层SL分组和增强层SL分组以及所述基础层PES分组和增强层PES分组中分别插入时间戳信息，而分别执行所述基础层SL分组和增强层SL分组之间的同步以及所述基础层PES分组和增强层PES分组之间的同步。2. The transmitting apparatus according to claim 1, wherein the SL packetizing conversion unit and the PES packetizing conversion unit divide the base layer SL packet and the enhancement layer by using OCR (Object Clock Reference) asserted based on the same STC (System Time Clock) time stamp information is inserted into the SL packet and the base layer PES packet and the enhancement layer PES packet respectively, and the synchronization between the base layer SL packet and the enhancement layer SL packet and the synchronization between the base layer PES packet and the enhancement layer PES packet are respectively performed. Synchronization between groups. 3.根据权利要求2的传送装置，其中该SL打包变换单元插入CTS(复合时间戳)作为该时间戳信息。3. The transmission device according to claim 2, wherein the SL packet conversion unit inserts a CTS (Composite Time Stamp) as the time stamp information. 4.根据权利要求2的传送装置，其中该PES打包变换单元插入PTS(呈现时间戳)作为该时间戳信息。4. The transmission device according to claim 2, wherein the PES packet conversion unit inserts a PTS (Presentation Time Stamp) as the time stamp information. 5.根据权利要求1的传送装置，其中当生成基础层TS分组和增强层TS分组时，该TS多路复用单元使用在基础层ES和增强层ES中的同一STC。5. The transmitting apparatus according to claim 1, wherein the TS multiplexing unit uses the same STC in the base layer ES and the enhancement layer ES when generating the base layer TS packet and the enhancement layer TS packet. 6.根据权利要求1的传送装置，其中该TS多路复用单元在基础层ES和增强层ES中分别插入PCR(节目基准时钟)。6. The transmitting apparatus according to claim 1, wherein the TS multiplexing unit inserts PCR (Program Reference Clock) in the base layer ES and the enhancement layer ES, respectively. 7.根据权利要求1的传送装置，还包括附加数据生成单元，用于基于在该编码单元中分离的基础层ES和增强层ES，而分别生成用于场面构造的附加数据信息。7. The transmitting apparatus according to claim 1, further comprising an additional data generating unit for generating additional data information for scene construction based on the base layer ES and the enhancement layer ES separated in the encoding unit, respectively. 8.根据权利要求7的传送装置，还包括部分生成单元，用于生成用于基础层ES的PSI(PSI-节目特定信息)部分和用于增强层ES的PSI部分，其中所述用于基础层ES的PSI部分和用于增强层ES的PSI部分中的每一个包括附加数据。8. The transmission device according to claim 7, further comprising a part generation unit for generating a PSI (PSI-Program Specific Information) part for the base layer ES and a PSI part for the enhancement layer ES, wherein the part for the base layer ES Each of the PSI part of the layer ES and the PSI part for the enhancement layer ES includes additional data. 9.根据权利要求7的传送装置，其中所述附加数据信息中的每一个被分别传送到基础层ES和增强层ES，其中仅为了增强层而添加的附加数据信息被传送到增强层ES。9. The transmitting apparatus according to claim 7, wherein each of said additional data information is transmitted to the base layer ES and the enhancement layer ES respectively, wherein the additional data information added only for the enhancement layer is transmitted to the enhancement layer ES. 10.根据权利要求7的传送装置，其中用于基础层和用于增强层的附加数据两者仅通过基础层ES传送，并且当缺少用于增强层的附加数据时，仅将用于基础层的附加数据传送到基础层ES。10. The transmission device according to claim 7, wherein both the additional data for the base layer and for the enhancement layer are transmitted only through the base layer ES, and when there is a lack of additional data for the enhancement layer, only the ES for the base layer will be used The additional data is transmitted to the base layer ES. 11.一种用于在DMB传送系统中提供高质量多媒体服务的接收装置，该接收装置包括：11. A receiving device for providing high-quality multimedia services in a DMB transmission system, the receiving device comprising: 质量选择单元，用于确定要接收仅基础层流还是要接收基础层流和增强层流两者；a quality selection unit for determining whether to receive only the base layer stream or to receive both the base layer stream and the enhancement layer stream; 解码单元，用于对基础层流和增强层流分别进行解码，并分别输出基础层TS分组和增强层TS分组；A decoding unit, configured to decode the base layer stream and the enhancement layer stream respectively, and output the base layer TS packet and the enhancement layer TS packet respectively; TS解多路复用单元，用于对所述基础层TS分组和增强层TS分组分别进行解多路复用，以便分别获得基础层PES分组和增强层PES分组；A TS demultiplexing unit, configured to demultiplex the base layer TS packets and the enhancement layer TS packets respectively, so as to obtain the base layer PES packets and the enhancement layer PES packets respectively; PES解包变换单元，用于对所述基础层PES分组和增强层PES分组分别进行解码，以便分别获得基础层SL分组和增强层SL分组；和A PES unpacking transformation unit, configured to decode the base layer PES packet and the enhancement layer PES packet respectively, so as to obtain the base layer SL packet and the enhancement layer SL packet respectively; and SL解包变换单元，用于对所述基础层SL分组和增强SL分组进行多路复用，以便获得基础层ES和增强层ES。The SL depacketizing and transforming unit is configured to multiplex the base layer SL packet and the enhanced SL packet, so as to obtain the base layer ES and the enhanced layer ES. 12.根据权利要求11的接收装置，其中该PES解包变换单元和该SL解包变换单元以使用基于同一STC断定的OCR插入的时间戳信息为基础，分别执行基础层PES分组和增强层PES分组之间的同步以及基础层SL分组和增强层SL分组之间的同步。12. The receiving apparatus according to claim 11 , wherein the PES depacketization transformation unit and the SL depacketization transformation unit perform base layer PES grouping and enhancement layer PES packetization, respectively, on the basis of time stamp information inserted using OCR predicated on the basis of the same STC. Synchronization between packets and synchronization between base layer SL packets and enhancement layer SL packets. 13.根据权利要求12的接收装置，其中该PES解包变换单元通过使用作为该时间戳信息插入的PTS，来执行同步。13. The reception apparatus according to claim 12, wherein the PES depacketization conversion unit performs synchronization by using the PTS inserted as the time stamp information. 14.根据权利要求12的接收装置，其中该SL解包变换单元通过使用作为该时间戳信息插入的CTS，来执行同步。14. The reception apparatus according to claim 12, wherein the SL depacketization conversion unit performs synchronization by using the CTS inserted as the time stamp information. 15.根据权利要求12的接收装置，其中该TS解多路复用单元通过使用在基础层ES和增强层ES之一中包括的PCR，来执行同步。15. The receiving apparatus according to claim 12, wherein the TS demultiplexing unit performs synchronization by using a PCR included in one of the base layer ES and the enhancement layer ES. 16.根据权利要求11的接收装置，其中通过所述基础层ES和增强层ES中的每一个来接收在该DMB传送系统的传送单元所传送的流中已插入的用于场面构造的附加数据信息，并且从增强层ES中提取仅为了增强层添加的附加数据信息。16. The receiving apparatus according to claim 11 , wherein the additional data for scene construction inserted in the stream transmitted by the transmission unit of the DMB transmission system is received by each of the base layer ES and the enhancement layer ES information, and extract additional data information added only for the enhancement layer from the enhancement layer ES. 17.根据权利要求11的接收装置，其中通过所述基础层ES来接收在该DMB传送系统的传送单元所传送的流中已插入的用于场面构造的附加数据信息，其中该附加数据信息包括用于基础层的附加数据和用于增强层的附加数据。17. The receiving device according to claim 11 , wherein the additional data information for scene construction that has been inserted in the stream transmitted by the transmission unit of the DMB transmission system is received through the base layer ES, wherein the additional data information includes Additional data for the base layer and additional data for the enhancement layer. 18.根据权利要求11的接收装置，其中仅通过所述基础层ES来接收在该DMB传送系统的传送单元所传送的流中已插入的用于场面构造的附加数据信息。18. The reception apparatus according to claim 11, wherein the additional data information for scene construction inserted in the stream transmitted by the transmission unit of the DMB transmission system is received only through said base layer ES. 19.根据权利要求16到18中的任一个的接收装置，其中该附加数据信息包括PSI、IOD(初始对象描述符)、OD、和BIFS(场面的二进制格式)信息。19. The receiving apparatus according to any one of claims 16 to 18, wherein the additional data information includes PSI, IOD (Initial Object Descriptor), OD, and BIFS (Binary Format of Scenes) information. 20.一种用于在DMB传送系统中提供高质量多媒体服务的传送方法，该传送方法包括：20. A delivery method for providing high-quality multimedia services in a DMB delivery system, the delivery method comprising: 将输入多媒体内容分离为基础层ES和增强层ES；Separating the input multimedia content into base layer ES and enhancement layer ES; 将该基础层ES和该增强层ES变换为基础层SL分组和增强层SL分组；transforming the base layer ES and the enhancement layer ES into base layer SL packets and enhancement layer SL packets; 将该基础层SL分组和该增强层SL分组变换为基础层PES分组和增强层PES分组；和converting the base layer SL packet and the enhancement layer SL packet into a base layer PES packet and an enhancement layer PES packet; and 根据基础层ES和增强层ES对该基础层PES分组和该增强层PES分组进行多路复用，并输出基础层TS分组和增强层TS分组。The base layer PES packet and the enhancement layer PES packet are multiplexed according to the base layer ES and the enhancement layer ES, and the base layer TS packet and the enhancement layer TS packet are output. 21.根据权利要求20的传送方法，其中变换为基础层SL分组和增强层SL分组以及变换为基础层PES分组和增强层PES分组的步骤包括：通过使用基于同一STC断定的OCR在该基础层SL分组和该增强层SL分组中插入时间戳信息和在该基础层PES分组和该增强层PES分组中插入时间戳信息，而分别执行基础层SL分组和增强层SL分组之间的同步以及基础层PES分组和增强层PES分组之间的同步。21. The transfer method according to claim 20, wherein the steps of converting into base layer SL packets and enhancement layer SL packets and into base layer PES packets and enhancement layer PES packets comprise: Inserting time stamp information in the SL packet and the enhancement layer SL packet and inserting time stamp information in the base layer PES packet and the enhancement layer PES packet, respectively performing synchronization between the base layer SL packet and the enhancement layer SL packet and the basic Synchronization between layer PES packets and enhancement layer PES packets. 22.根据权利要求21的传送方法，其中在变换为基础层SL分组和增强层SL分组的步骤中，插入CTS作为该时间戳信息。22. The transmission method according to claim 21, wherein in the step of converting into the base layer SL packet and the enhancement layer SL packet, CTS is inserted as the time stamp information. 23.根据权利要求21的传送方法，其中在变换为基础层PES分组和增强层PES分组的步骤中，插入PTS作为该时间戳信息。23. The transmission method according to claim 21, wherein in the step of converting into the base layer PES packet and the enhancement layer PES packet, a PTS is inserted as the time stamp information. 24.根据权利要求20的传送方法，其中在该TS多路复用步骤中，当生成基础层TS分组和增强层TS分组时，使用基础层ES和增强层ES中的同一STC。24. The transmission method according to claim 20, wherein in the TS multiplexing step, when generating the base layer TS packet and the enhancement layer TS packet, the same STC in the base layer ES and the enhancement layer ES is used. 25.根据权利要求20的传送方法，其中在该TS多路复用步骤中，在基础层ES和增强层ES中插入PCR。25. The transmission method according to claim 20, wherein in the TS multiplexing step, PCRs are inserted in the base layer ES and the enhancement layer ES. 26.根据权利要求20的传送方法，还包括：基于在编码基础层ES和增强层ES时获得的基础层ES和增强层ES，而生成用于场面构造的附加数据。26. The transmitting method according to claim 20, further comprising: generating additional data for scene construction based on the base layer ES and the enhancement layer ES obtained when encoding the base layer ES and the enhancement layer ES. 27.根据权利要求26的传送方法，还包括生成用于基础层ES的PSI部分和用于增强层ES的PSI部分，其中所述用于基础层ES的PSI部分和用于增强层ES的PSI部分中的每一个包括附加数据。27. The transmission method according to claim 26, further comprising generating a PSI part for the base layer ES and a PSI part for the enhancement layer ES, wherein the PSI part for the base layer ES and the PSI for the enhancement layer ES Each of the sections includes additional data. 28.根据权利要求26的传送方法，其中将用于基础层的附加数据和用于增强层的附加数据分别传送到基础层ES和增强层ES。28. The transmission method according to claim 26, wherein the additional data for the base layer and the additional data for the enhancement layer are transmitted to the base layer ES and the enhancement layer ES, respectively. 29.根据权利要求26的传送方法，其中用于基础层的附加数据和用于增强层的附加数据两者在基础层ES中传送。29. The transmission method according to claim 26, wherein both the additional data for the base layer and the additional data for the enhancement layer are transmitted in the base layer ES. 30.一种用于在DMB传送系统中提供高质量多媒体服务的接收方法，该接收方法包括：30. A receiving method for providing high-quality multimedia services in a DMB delivery system, the receiving method comprising: 质量选择操作，用于确定要接收仅基础层流还是要接收基础层流和增强层流两者；a quality selection operation to determine whether only the base layer stream or both the base layer stream and the enhancement layer stream are to be received; 解码操作，用于对基础层流和增强层流进行解码，并输出基础层TS分组和增强层TS分组；A decoding operation for decoding the base layer stream and the enhancement layer stream, and outputting the base layer TS packet and the enhancement layer TS packet; TS解多路复用操作，用于对所述基础层TS分组和增强层TS分组进行解多路复用，以便获得基础层PES分组和增强层PES分组；a TS demultiplexing operation for demultiplexing the base layer TS packets and enhancement layer TS packets to obtain base layer PES packets and enhancement layer PES packets; PES解包变换操作，用于对所述基础层PES分组和增强层PES分组进行解码，以便获得基础层SL分组和增强层SL分组；和a PES depacketization operation for decoding said base layer PES packets and enhancement layer PES packets to obtain base layer SL packets and enhancement layer SL packets; and SL解包变换操作，用于对所述基础层SL分组和增强SL分组进行多路复用，以便获得基础层ES和增强层ES。The SL depacketization operation is used for multiplexing the base layer SL packet and the enhancement SL packet, so as to obtain the base layer ES and the enhancement layer ES. 31.根据权利要求30的接收方法，其中在该PES解包变换操作和该SL解包变换操作中，以使用基于同一STC断定的OCR插入的时间戳信息为基础，分别执行基础层PES分组和增强层PES分组之间的同步和基础层SL分组和增强层SL分组之间的同步。31. The receiving method according to claim 30, wherein in the PES unpacking conversion operation and the SL unpacking conversion operation, base layer PES packetization and Synchronization between enhancement layer PES packets and synchronization between base layer SL packets and enhancement layer SL packets. 32.根据权利要求31的接收方法，其中在该PES解包变换操作中，通过使用作为该时间戳信息插入的PTS，来执行同步。32. The receiving method according to claim 31, wherein in the PES depacket conversion operation, synchronization is performed by using the PTS inserted as the time stamp information. 33.根据权利要求31的接收方法，其中在该SL解包变换操作中，通过使用作为该时间戳信息插入的CTS，来执行同步。33. The receiving method according to claim 31, wherein in the SL depacket conversion operation, synchronization is performed by using the CTS inserted as the time stamp information. 34.根据权利要求31的接收方法，其中在该TS解多路复用操作中，通过使用在基础层ES和增强层ES之一中包括的PCR，来执行同步。34. The receiving method according to claim 31, wherein in the TS demultiplexing operation, synchronization is performed by using a PCR included in one of the base layer ES and the enhancement layer ES. 35.根据权利要求30的接收方法，其中通过该基础层ES和该增强层ES中的每一个来接收在该DMB传送系统的传送单元所传送的流中已插入的用于场面构造的附加数据信息，并且从增强层ES中提取仅为了增强层而添加的附加数据。35. The receiving method according to claim 30, wherein the additional data for scene construction inserted in the stream transmitted by the transmission unit of the DMB transmission system is received by each of the base layer ES and the enhancement layer ES information, and additional data added only for the enhancement layer is extracted from the enhancement layer ES. 36.根据权利要求30的接收方法，其中通过所述基础层ES来接收在该DMB传送系统的传送单元所传送的流中已插入的用于场面构造的附加数据信息，其中该附加数据信息包括用于基础层的附加数据和用于增强层的附加数据。36. The receiving method according to claim 30, wherein the additional data information for scene construction that has been inserted in the stream transmitted by the transmission unit of the DMB transmission system is received by the base layer ES, wherein the additional data information includes Additional data for the base layer and additional data for the enhancement layer. 37.根据权利要求30的接收方法，其中仅通过所述基础层ES来接收在该DMB传送系统的传送单元所传送的流中已插入的用于场面构造的附加数据信息。37. The receiving method according to claim 30, wherein the additional data information for scene construction inserted in the stream transmitted by the transmission unit of the DMB transmission system is received only through said base layer ES. 38.根据权利要求35到37中的任一个的接收方法，其中该附加数据信息包括PSI、IOD、OD、和BIFS信息。38. The receiving method according to any one of claims 35 to 37, wherein the additional data information includes PSI, IOD, OD, and BIFS information.
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