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Sinais de vídeo

Conceitos de sinais de vídeo em geral

QuestionAnswer
1080i Resolução vertical de 1080 linhas de forma entrelaçãda.
29,97 Frame rate do sinal NTSC (ajustado 1000/1001 para não interferir com a portadora de áudio).
2K / 4K Sistemas de resolução além do full-HD.
4:2:2 Taxa de sampling onde o canais de chroma U e V são reduzidos em 50%.
720p Resolução vertical de 720 linhas de forma progressiva.
Artefatos Defeitos provenientes da compressão do vídeo.
Aspect Ratio Proporção da imagem.
AVC (Advanced Video Coding) Padrão de compressão H.264 usado no CODEC MPEG-4.
B-Frame Quadro bidirecional usado em GOPs comprimidos.
Blackburst Sinal de vídeo em black e pulso de sincronismo usado como referência nos sistemas.
BNC (British Naval Connector) Conector de cabos coaxiais com 2 condutores e engate.
Chart de resolução Figura com listras enumeradas, usada para avaliar a resolução de determinados equipamentos de vídeo.
CODEC (COmpressor / DECompressor) Software / Hardware com algorítimos para compressão e descompressão de vídeo e áudio dentro dos equipamentos.
Color Bar Conjunto de barras coloridas usadas para ajuste de cor e brilho.
Color Depth Profundidade de amostragem em cada pixel de cor (RGB). Ex: 8 bits = 256 níveis de cor para azul + 256 para vermelho + 256 para verde.
Componente Sinal montado por 3 componentes diferentes: luminância(Y) + crominância 1(B-Y) + crominância 2(R-Y).
Composto Sinal onde os componentes YUV são multiplexados num único canal.
Created by: 1026415798
 

 



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