What is this BS EN 60461 - Time and control code about?
BS EN 60461 discusses time and control code. BS EN 60461 was originally developed for analogue television recording systems and thus dealt only with interlaced television systems operating with frame rates up to 30 frames per second. BS EN 60461 is, however, flexible enough in design to be used in digital television systems, both standard definition, and high definition. The support for progressive video systems with frame rates above 30 frames per second is described in BS EN 60461.
BS EN 60461 specifies a digital time and control code for use in television, film, and accompanying audio systems operating at nominal rate of 60, 59,94, 50, 30, 29,97, 25, 24, and 23,98 frames per second. BS EN 60461 defines primary data transport structures for linear time code (LTC) and vertical interval time code (VITC). BS EN 60461 specifies the LTC modulation and timing for all video formats. This standard also defines the VITC modulation and location for 525/59,94 and 625/50 analogue composite and component systems only.
Who is BS EN 60461 - Time and control code for?
BS EN 60461 on time and control code is useful for:
- Television manufacturers
- Research and development personnel
- Video content creators
- Design engineers
Why should you use BS EN 60461 - Time and control code?
In a system running at a frame rate of 25 frames per second, exactly one second of real time
elapses during the scanning of 25 frames. BS EN 60461 specifies a time address, binary groups, and flag bit structure. In addition, the standard specifies a binary group flag assignment, a linear time code transport, and a vertical interval time code transport.
BS EN 60461 specifies the manner in which time is represented in frame-based systems. BS EN 60461 specifies the structure of the time address and control bits of the code and sets guidelines for the storage of user data in the code and the modulation method and interface characteristics of a linear time code (LTC) source.
BS EN 60461 provides guidance on the modulation method for inserting the code into the vertical interval of a television signal. BS EN 60461 summarises the relationship between the two forms of time and control time code implementations for video formats with frame rates greater than 30 fps.
Overall, BS EN 60461 helps you with time and control code in digital television systems, both standard definition, and high definition.