TH17794B - Signal modulator for television receivers with an HDTV main image processor and NTSC picture-in-picture processor. - Google Patents

Abstract

A television system with a PIP display segment consisting of two NTSC modulators and a signal processing circuit. In order to achieve channel modulation (CHANNEL SWAP) functionality, the controller will search a table of information showing the presence of NTSC channel pairs and NTSC channel HDTV channels that are compiled. With the main HDTV source, it is tuned by the PIP NTSC modulator, and the HDTV channels that are fitted with the PIP NTSC source are tuned by the HDTV modulator if the superimposed image does not have an HDTV channel that has been matched. The second NTSC modulator is controlled to select a channel previously tuned by the NTSC PIP modulator.

Claims (8)

1. Signal processing equipment illustrated as well. First signal processor (122, 132, 160, 162) for selecting the first channel with First picture list in first style And for creating the first image signal to represent the first image entry, the second signal processing circuit (126, 136, 143, 145) for selecting the second channel with List the second image in the second format. And for generating a second video signal that replaces the aforementioned second picture entry. The path (SW,) for merging the first and second signals to form the signal. A merged image that represents the displayed image with the first and second regions listing the first image. And the second, respectively, and a control path (180) for processing the information of the data channel for determining as The third box contains a list of the first images in the second format. And for the fourth box containing the second picture item In the first form Such a control path responds to commands that cause the active signal processor to One and the second aforementioned, select the fourth box. And the third box, respectively, for listing the images Two and a picture in the first area And the second of the images will be displayed therein, respectively. 2. Device according to claim 1, where the format one is HDTV 3. Device according to claim 1, where the second format is NTSC. 4. Device according to claim 1, where the second format is PAL. 5. Device according to claim 1, where the second form is SECAM. 6. Equipment according to claim 1, where such equipment still consists of A circuit connected to such controller (180) for receiving and processing the supplementary data used. Instead of information of the said field 7. Device according to claim 1, where the information of the channel data is entered by the user. 8. Methods for modifying item one is broadcast in a form. And shown in the main picture with the second item being broadcasted in the second form. And shown in the supplementary image Consists of the steps of Positioning the first channel passed through the first entry in the second format. Positioning the second channel passed through the second in the first form and making the second channel rendered in the main image. And the first such field will be displayed In the above picture