Digital colour television camera apparatus.

摘要

Digital colour television camera apparatus includes an encoder (8) for selectively producing either a digital component video signal or a digital composite video signal in accordance with first or second television standards (for example NTSC or PAL) by encoding digital primary colour image signals in a first mode to produce digital component video signals and in a second mode to produce digital composite video signals. The encoder (8) includes a matrix (25) for producing digital colour difference signals at a clock rate equal to the digital sampling clock rate 2fs and a down sampler (30) for down sampling the digital colour difference signals to reduce the clock rate. A digital low-pass filter (37) limits the frequency band of a down-sampled colour difference signal. The encoder (8) also includes a level setter (13) for establishing predetermined quantizing values to represent respective reference signals levels of the digital component video signal when the encoder (8) operates in its first mode, and for establishing different predetermined quantizing values to represent reference levels of the digital composite video signal when the encoder (8) operates in its second mode. <IMAGE>