Análise do padrão MMT para transporte de serviços de TV digital

Abstract

A digital TV system uses standardized methods for compression, multiplexing and transmission of audiovisual signals and content data. Speci cally in the multiplexing stage, the most widespread systems are currently based on the international standard of the MPEG group (Moving Picture Experts Group) { ISO/IEC 13818-1 (2015). With the increasing volume of video streaming on the Internet, whether through on-demand or real-time services, the need arose for the development of transport mechanisms / protocols with greater

exibility and control of the quality of the transmitted service. To meet this new segment and also ensure the evolution of television services, a new ISO (International Organization for Standardization) standard has been developed. This dissertation presents the main characteristics and functionalities of the new international standard MMT (MPEG Media Transport), developed by ISO, for the transportation and hybrid delivery of multimedia tra c of digital TV services in broadcast and broadband networks. The architecture of the MMT is presented, as well as its respective data structures, protocol formatting and control messages. It is also proposed the implementation of a protocol analyzer speci c to MMTP (MPEG Media Transport Protocol ), standardized by ISO/IEC 23008-1 (2017) and potential substitute of the MPEG-2 Transport Stream protocol (MPEG-2 Transport Stream), in operation in the current television networks

Um sistema de TV digital utiliza m etodos padronizados para compress~ao, multiplexa c~ao e transmiss~ao dos sinais audiovisuais e dados de conte udo. Especi camente na etapa de multiplexa c~ao, os sistemas mais difundidos atualmente se baseiam na norma internacional do grupo MPEG (Moving Picture Experts Group) { ISO/IEC 13818-1 (2015). Com o crescente volume de transmiss~oes de uxos de v deo na Internet, seja por servi cos sob-demanda ou em tempo real, surgiu a necessidade do desenvolvimento de mecanismos/ protocolos de transporte com maior exibilidade e controle da qualidade do servi co transmitido. Para atender este novo segmento e tamb em garantir a evolu c~ao dos servi cos de televis~ao, foi desenvolvido um novo padr~ao ISO (International Organization for Standardization). Esta disserta c~ao apresenta as principais caracter sticas e funcionalidades do novo padr~ao internacional MMT (MPEG Media Transport), elaborado pela ISO, para transporte e entrega h brida de tr afego multim dia de servi cos de TV digital em redes por radiodifus~ao e banda-larga. E apresentada a arquitetura do MMT, assim como suas respectivas estruturas de dados, formata c~oes de protocolo e mensagens de controle. Tamb em e proposta a implementa c~ao de um analisador de protocolos, espec co para o MMTP (MPEG Media Transport Protocol ), padronizado pela norma ISO/IEC 23008-1 (2017) e potencial substituto do protocolo MPEG-2 TS (MPEG-2 Transport Stream), em opera c~ao nas atuais redes de televis~ao