| 摘要 |
A signal processing means for generating a composite image wherein the signal from a tuner (14) may be switched between a display (20) and a mixer (40), thereby preventing the internal transfer of broadcast derived video signals within the receiver with direct tuner signals. Said mixer (40) receives the signal from the tuner and from a second means (44, 48), combines said signals and conveys them to a TV receiver video input (22) forming a composite image. The mixer may also alter the background image brightness, contrast and other parameters to permit easier viewing of images or messages. The second means may comprise a camera (CCTV), a baby monitor, a computer system, or a VCR. |
