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A televisão de definição padrão (em inglês standard-definition television, sigla SDTV), refere-se a sistemas televisivos que tenham uma resolução de imagem que alcance certos padrões mas não sejam considerados EDTV (TV de definição aprimorada) ou HDTV (TV de alta definição).
Standard-definition television (SDTV; also standard definition or SD) is a television system that uses a resolution that is not considered to be either high or enhanced definition. Standard refers to offering a similar resolution to the analog broadcast systems used when it was introduced.
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According to an NTSC standard, SDTV broadcasts in three ways.First, at ratio of length and width 16:9 and resolution 720x480.Second, at ratio 4:3 and resolution 704x480 Lastly, at ratio 4:3 and resolution 640x480.The first one has best quality, second one is next, and the last one is the worst.The screen's frame can be 24, 30, 60 per second. These ...
SDTV has a similar state of resolution compared to analog TV. But SDTV is more vivid thananalog TV because it has less noise. And it has better sound. The point that SDTV uses a digital broadcasting system makes SDTV have many accompaning functions. For example, multitasking, electronic program guide, and so on. This functions are impossible at ana...
Generally, there are three types of TV. They are analog TV, SDTV and HDTV. Price : AnalogTV < SDTV < HDTV Quality : AnalogTV ≒ SDTV < HDTV AnalogTV only can be compatible with analog signals, but both SDTV and HDTV can be compatible with not only analog but also digital signals.
Televisão de alta definição. As principais resoluções de tela para televisão. A televisão de alta definição (em inglês high-definition television, sigla HDTV ), é um sistema de transmissão televisiva com uma resolução de tela significativamente superior à dos formatos tradicionais ( NTSC, SECAM, PAL ).
The term has been used since at least 1933; [1] in more recent times, it refers to the generation following standard-definition television (SDTV). It is the current de facto standard video format used in most broadcasts: terrestrial broadcast television, cable television, satellite television .
Televisão digital. A televisão digital (ou DTV, das suas siglas em inglês: digital TV) refere-se ao conjunto de tecnologias de transmissão e recepção de imagem e som, através de sinais digitais.
SDTV resolution by nation; countries using 576i are in blue. 576i is a standard-definition digital video mode, originally used for digitizing analogue television in most countries of the world where the utility frequency for electric power distribution is 50 Hz.
