2012Forum Video Assist and Video Accessories
Unterscheidung zwischen analogem Composite Video (CVBS) und digitalen SDI-Formaten (SD-SDI und HD-SDI) in Kinokamerazubehör
14 Jahre alt. Geräte und Preise können sich seitdem geändert haben.
Was die Diskussion ergab
- Composite-Video ist ein analog moduliertes Signal, das anfällig für Degradation über die Entfernung ist, während SDI ein digitaler Datenstrom ist, der nicht auf die gleiche Weise abgebaut wird.
- HD-SDI carries high-definition video as a digital signal, and SD-SDI carries standard-definition video in the same digital format.
- Many accessory manufacturers claim to handle SD video, but often mean only SD-SDI rather than analog CVBS, which are incompatible formats.
- Products marketed as supporting both SD and HD typically work only with digital SDI formats and cannot accept or process analog composite signals unless explicitly specified.
- Different HD-SDI signals follow various SMPTE standards, and older monitors designed for older standards may refuse to display newer HD-SDI variants such as progressive 1080p signals.
- Decimator MD-DUCC performs format cross-conversion only within the SDI domain and does not convert between analog CVBS and digital SDI.
- Atomos Samurai records SD only when receiving an SDI input, not from analog composite sources.
- Switronix Recon transmits only SD-SDI, not analog CVBS video.
- Using a single BNC connector type for multiple signal formats creates confusion on set when cables get connected to wrong inputs.
Hängt ab von
- The discussion focuses on cinema camera workflows and may not apply equally to broadcast or other video contexts.
- Claims about specific products are based on user reports and experience rather than manufacturer specifications.
- The question of cheap CVBS to SD-SDI conversion remains unanswered in the thread.
- Compatibility issues with older Sony and JVC monitors were reported primarily with RED Epic progressive signals.