An automatic system for supervision of the video and audio content in digital TV broadcasts was investigated in this master’s thesis project. The main goal is to find the best and most cost effective solution for Teracom to verify that the broadcast TV content as received by remote receivers is the same as that incoming to Teracom from content providers. Different solutions to this problem will be presented. The report begins with some background information about the Swedish terrestrial digital TV network and the MPEG-2 compression standard used to transport audio and video; including a description of the DVB Systems and Transport Stream protocol. It describes two current techniques for the supervision of the audio and video content, including an evaluation of these techniques. The first solution is to monitor the video and audio content either by detecting common errors such as frozen picture, visible artifacts, or by comparing the content from two different sources, i.e. a comparison of the output and the input content. The later could be done using video fingerprinting. The second solution monitors the video and audio content indirectly by analyzing the Transport Stream. This could be done either by comparing two Transport Streams to verify that the broadcast signal is identical to the received signal or by detecting common errors in the streams. Further two new potential solutions will be presented based on the research utilizing background knowledge of the MPEG-2 compression standard. The thesis ends with a summary with conclusions and evaluations of all four solutions and future work. / Ett system för automatisk övervakning av ljud- och bildinnehåll i digitala TV sändningar var undersökt i detta exjobb. Målet är att hitta bästa och mest kostnadseffektiva lösningen för Teracom för verifiering av TV innehållet som tas emot av fjärrmottagare är densamma som Teracom får från sina tjänsteleverantörer. Olika lösningar till detta problem blir presenterade. Presentationen startar med bakgrundsinformation om Sveriges marknät för digital TV och MPEG-2 komprimeringsstandarden som används för ljud- och bildsändningar. Den kommer att inkludera en kort beskrivning av DVB system och Transport ström protokoll. Två nuvarande tekniker för övervakningen av ljud- och bildinnehåll kommer att presenteras. Första lösningen handlar om att övervaka TV innehåller antigen genom att detektera vanligast förekommande fel såsom fryst bild, tydliga artefakter eller genom en jämförelse av innehållet från två olika källor, dvs. en jämförelse av ingångs och utgångssignal. Den senare kan åstadkommas genom att använda en så kallad video fingeravtryck. Andra lösningen övervakar ljud- och bildinnehåll indirekt genom att analyser Transport strömmen. Detta görs genom en jämförelse av två Transport strömmar för verifiering om signalen är densamma samt genom detektering av vanligast förekommande fel i strömmarna. Vidare, två nya potentiella lösningar kommer att presenteras med utgångspunkt från den backgrundskunskap om MPEG-2 komprimerings standard som getts. Presentationen avslutas med en sammanfattning och utvärdering av alla fyra lösningar och framtida arbeten.

Pesquisa em Comunicação na área de Meios de Processos Audiovisuais que estuda as estratégias de grade de programação de domingo na TV aberta brasileira. Ênfase no domingo em virtude de ser o dia com maior número de telespectadores ligados e por ser um dos dias com maior visibilidade dos produtos veiculados. As principais linhas teóricas utilizadas na interpretação da pesquisa tratam da formação do hábito de ver televisão, do contrato afetivo entre o fluxo da grade de programação e o telespectador e do Princípio da Razão Durante através da teoria do Metáporo. Texto multidisciplinar que reúne teóricos de Comunicação, Estudo de TV, Estudos Culturais, Sociologia, Filosofia para construir um corpo teórico que trata de entender estratégias utilizadas pelas emissoras para montar a grade de programação e de como a grade se torna um específico da TV, um produto audiovisual único e fluído e uma forma discursiva estratégica das empresas de comunicação. / Research in Communication within the Audiovisual Media Process area focused on the broadcast Sunday Brazilian TV programming strategies. It emphasizes the Sunday programming due to be the day with the largest number of viewers watching TV and due to one of the days that gets more visibility to the media products and production. The main theoretical lines used in the research are about the habit of watching TV, the emotional contract established between the programming flow and the TV viewer and also the Princípio da Razão Durante (Ongoing Principle) through the Metaporo´s theory. Multidisciplinary text gathering theories from Communication, TV Studies, Cultural Studies, Sociology and Philosophy to build a theoretic body of work to understand the strategies used by the TV stations and networks to form the programming grid and how the grid becomes TV´s specific language, one fluid and exclusive audiovisual product and also an strategic discursive form belonging to the communication enterprises.

Pesquisa em Comunicação na área de Meios de Processos Audiovisuais que estuda as estratégias de grade de programação de domingo na TV aberta brasileira. Ênfase no domingo em virtude de ser o dia com maior número de telespectadores ligados e por ser um dos dias com maior visibilidade dos produtos veiculados. As principais linhas teóricas utilizadas na interpretação da pesquisa tratam da formação do hábito de ver televisão, do contrato afetivo entre o fluxo da grade de programação e o telespectador e do Princípio da Razão Durante através da teoria do Metáporo. Texto multidisciplinar que reúne teóricos de Comunicação, Estudo de TV, Estudos Culturais, Sociologia, Filosofia para construir um corpo teórico que trata de entender estratégias utilizadas pelas emissoras para montar a grade de programação e de como a grade se torna um específico da TV, um produto audiovisual único e fluído e uma forma discursiva estratégica das empresas de comunicação. / Research in Communication within the Audiovisual Media Process area focused on the broadcast Sunday Brazilian TV programming strategies. It emphasizes the Sunday programming due to be the day with the largest number of viewers watching TV and due to one of the days that gets more visibility to the media products and production. The main theoretical lines used in the research are about the habit of watching TV, the emotional contract established between the programming flow and the TV viewer and also the Princípio da Razão Durante (Ongoing Principle) through the Metaporo´s theory. Multidisciplinary text gathering theories from Communication, TV Studies, Cultural Studies, Sociology and Philosophy to build a theoretic body of work to understand the strategies used by the TV stations and networks to form the programming grid and how the grid becomes TV´s specific language, one fluid and exclusive audiovisual product and also an strategic discursive form belonging to the communication enterprises.