KR970004925B1 - Circuit for generating a initial scene in image decoding system - Google Patents

Abstract

The initial screen generating circuit for a video decoding system is directed to storing a basic screen set when fabricating the system and a certain screen for a selection registration and generating an initial screen when a video received when a power is supplied to the system or during a channel conversion is received. This circuit includes a video decoder(110) for receiving a compression coded digital video data and decoding to the original video data, a storing unit(140, 150) for storing the compressed and decoded video data and registering and storing an initial screen when fabricating the system, and a main screen and assistant screen selection circuit for selecting a main screen video data outputted from the main screen storing unit(140) or a video data of an assistant initial screen provided from the initial screen registration and storing unit(140, 150).

Description

Initial Screen Generation Circuit of Image Decoding System

Figure is a block diagram showing the initial screen generation circuit of the image decoding system according to the present invention

* Explanation of symbols for main parts of the drawings

110: video decoder 120: initial screen register

130: image selection logic unit 140: main screen storage unit

150: sub initial screen storage unit 160: main screen and sub initial screen selection circuit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital video decoding system. In particular, in a high-definition television (HDTV), a basic screen set during manufacturing or a specific screen selected and registered by a user is stored and received when the power is first turned on or when a channel is switched. An initial screen generating circuit of an image decoding system for generating an initial screen while an image to be displayed is displayed.

HDTV takes a considerable amount of time due to channel equalization or video decoder due to high-speed, high-capacity data processing. Received broadcast video information) cannot be displayed. The user may not be able to display the screen he / she wants during the time required for interface with various devices (eg, video tape recorder, laser displayer, computer, etc.) used in connection with HDTV, which is a digital broadcaster. There were problems such as making me feel bored or even irritable.

Accordingly, an object of the present invention is to solve the above-described problems, and an object of the present invention is to store a basic screen set at the time of manufacture or a specific screen selected and registered by a user in high-definition television, and then switch on a channel or turn on a channel for the first time. The present invention provides an initial screen generating circuit of an image decoding system for generating a basic screen or a specific screen while a received image is displayed.

In order to achieve the above object, the present invention provides a digital decoder comprising a video decoder for receiving the compressed coded digital video data and decoded to restore the original video data, and a main screen storage unit for storing the decoded video data. An initial screen generating circuit of a video decoding system, comprising: means for storing the compressed and coded predetermined video data, and registering and storing the initial screen at the time of manufacture of the first set; A main screen and an auxiliary initial screen selection circuit for selecting and outputting main screen image data output from the main screen storage unit or image data of an auxiliary initial screen provided from the initial screen registration and storage means; A screen selection logic unit is provided to provide a predetermined control signal to the main screen and the auxiliary initial screen selection circuit to select one of the main screen and the sub initial screen.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure is a block diagram showing an initial screen generating circuit of the image decoding system according to the present invention, the initial screen generating circuit is the image decoder 110, the initial screen registration unit 120, the screen selection logic unit 130, the main screen storage The unit 140, an auxiliary initial screen storage unit 150, and a main screen and an auxiliary initial screen selection circuit 160 are included. By such a circuit, the user arbitrarily registers the screen so as to make the user feel less dissatisfaction or inconvenience during the time delay caused by the channel equalization or image decoding as described above, or during interface with various devices used in connection with the digital HDTV. In addition, by displaying a screen or the like basically provided by the set maker at the time of manufacture, it is possible to provide a higher quality service to the user.

The image decoder 110 receives a bit stream compressed and encoded by predetermined techniques in an image encoder (not shown), thereby performing variable length decoding, inverse quantization, and inverse discrete cosine transform. The original image information is restored through cosine transform and motion compensation, and the restored image information is transmitted to the main image storage unit 140 and the auxiliary initial image storage unit 150, respectively.

The initial screen registration unit 120 receives the control signal for registering a new initial screen arbitrarily from the main signal processing unit (not shown) of the video decoding system, which will be described later with the decoded image data output from the image decoder 110 described above. The initial storage and registration control signal SRC is transmitted to the auxiliary initial screen storage 150 so that the new screen may be stored and registered in the auxiliary initial screen storage 150. In addition, when selecting various initial screens stored in the subsidiary initial screen storage unit 150 to be described later, the control signal is received from the main signal processing unit, and also the selection control signal is transferred to the subsidiary initial screen storage unit 150. The auxiliary initial screen storage unit 150 is a device that receives the initial storage and registration control signals provided by the initial screen registration unit 120 and stores the image data output from the image decoder 110. The initial screen set at the time of manufacture is stored at 150. The initial screen image data stored as described above, i.e., the initial screen at which the user arbitrarily registers the screen provided at the time of manufacture or the screen provided by the image decoder 110 described above. After a predetermined time is transferred to the main screen and the auxiliary initial screen selection circuit 160. The main screen storage unit 140 stores the image data received from the broadcast station decoded by the image decoder 110, and the stored data is also transferred to the main screen and the auxiliary initial screen selection circuit 160 after a predetermined time.

On the other hand, the screen selection logic unit 130 receives a signal from the main signal processing unit of the video decoding system, such as switching the channel, whether to start the interface with the peripheral device, and if the initial screen should be displayed, the data of the screen is described above. The control signal is transmitted to the main screen and the auxiliary initial screen selection circuit 160 to immediately load and output various initial screen image data stored in the auxiliary initial screen storage unit 150. The main screen and the sub-initial screen selection circuit 160 receive a main screen and an initial screen selection control signal provided from the screen selection logic unit 130. In response to this, an initial screen is output to the display unit or a broadcast reception screen is selected and output. The selection circuit is a multiplexer (MUX). As such, the video signal selected through the main screen and the auxiliary initial screen selection circuit 160 is converted into R, G, and B signals through a display unit (not shown), and is displayed by an HDTV display device such as a cathode ray tube (CRT). Is displayed on the screen. The audio signal may be included in addition to the simple initial screen display of the present invention described above.

As described above, according to the present invention, when the power is first turned on or while the image received when switching channels is displayed, the user arbitrarily receives the current through a basic screen or initial screen registration and an auxiliary initial screen storage set at the time of manufacture. By storing a specific screen, and displays the user's initial screen selection request, there is an advantage that the user can watch more conveniently without boring.

Claims (2)

In an initial screen generating circuit of a digital image decoding sift step which includes a video decoder for receiving a decoded digital image data and decoded to restore the original image data and a main screen storage unit for storing the decoded image data. Means for storing the compression-encoded predetermined image data, and registering and storing an initial screen at the time of initial set manufacturing; A main screen and an auxiliary initial screen selection circuit for selecting and outputting main screen image data output from the main screen storage unit or image data of an auxiliary initial screen provided from the initial screen registration and storage means; And a screen selection logic unit configured to provide a predetermined control signal to the main screen and the auxiliary initial screen selection circuit to select one of the main screen and the sub initial screen. The initial screen generating circuit of claim 1, wherein the main screen and the auxiliary initial screen selecting circuit are formed of a multiplexer (MUX).