| 摘要 |
Composite and component video equipment frequently requires an external referenc e signal for synchronization. The use of digital video and audio signals places additiona l reliance on the reference to avoid buffer management problems, to manage jitter and to maint ain a defined relationship between video and audio signals. Color black is the traditionally used external reference signal for analog NTSC and PAL equipment. This standard specifies the use of a color black signal as a referenc e for all forms of composite and component, or analog, or digital compressed or uncompressed equ ipment using the system standards described below. The method and apparatus disclosed define synchronization signals to be used as an external reference for equipment using the system standards shown below. The method and apparatus disclosed provide a means to synchronize one, or more, unrelated timing signals using an unrelated timing signal as a reference input. The standard described provides a method of synchronizing unrelated signals such as the timin g reference signals used in different television broadcast standards, whether analog or digi tal in nature.
|
