| 摘要 |
<p>A television transmitting and receiving system can provide enhanced image display such as stereoscopic images or high resolution images. The system has a transmitting means which simultaneously transmits two television channels - one having standard television signals and the other having information concerning the enhanced image. Thus, the system is fully compatible with existing television receivers albeit that the existing television receivers will not be able to provide the enhanced image. A receiver has channel receiving circuits (1 and 1). The field identity of the video signal in each channel is selected by field detector circuits (3 and 3) from signals impressed in the blanking periods. The video signals are then passed to field selector circuit (4) which provides a composite video signal output having only the same fields (either always ''odd'' or always ''even'') but alternating the one channel and then the other channel (for stereoscopic television). In other words the field selector circuit (4) (in the case of stereoscopic television) selects right eye image and then left eye image. A control circuit (5) operates means to permit the viewer's eyes to see the required right eye image and the left eye image. The video signals from the selector circuit (4) and an audio signal from selector switch (2) are recombined in a modulator circuit (6) and sent to the input end of a normal television receiver. A transmitter for the above purpose is disclosed. A video camera having a binocular lens system is described.</p> |
