JPH03235593A - Picture receiving and reproducing device - Google Patents

Abstract

PURPOSE:To attain retrieval practically satisfactory at a receiver side of, e.g., a still picture broadcast by adding a function writing a compressed picture data directly in a frame memory or read out of the memory without expanding the data to a picture receiving and reproducing device. CONSTITUTION:In the reception of a menu pattern of a retrieval program broadcast, a menu picture during reception is written in a frame memory A108 while being decoded. The operator observes a menu picture displayed on a monitor 107 and controls a retrieval terminal equipment 105 according to the display content. When a compressed picture decoder 102 receives a command of retrieval from the operator via a system controller 104, a retrieved picture designated which is not yet expanded at the point of time in read out of a frame memory B109, expansion (decoding) processing is implemented and written in the frame memory A108. Thus, the operator obtains a required picture with retrieval.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for receiving image information in which the amount of transmitted information is compressed;
The present invention relates to an image receiving and reproducing device such as a still image reproducing device that reproduces and displays a still image, and particularly relates to an image receiving and reproducing device having a function of displaying a desired image.

[Prior Art] FIG. 343 shows an example of the configuration of a still image receiving and reproducing device having a conventional search function. satellite broadcasting line,
Image information input manually from a communication line etc. is sent to the “receiving unit 301”
The digital image signal is converted into a "compressed digital image signal" and sequentially decoded by the "compressed image decoder 302" to be expanded and restored to the original image. The images are sequentially written to the r-frame memory A aoaJ for the "menu screen", the "searched screen 1" to the "frame memory B 309J", and so on to the "frame memory E 313".

The image read from the frame memory is converted into an analog signal by a "D/A converter 306", a synchronization signal is added, and the image is displayed on a "monitor 307".

At first, the "menu screen" is displayed, and the operator follows the contents to "search terminal 3" to obtain the necessary image.
05". As a result, the "system controller 304" controls the currently displayed "frame memory A 3".
"Frame memory B NE 30" specified from 08J
Switch to 9-313J. Single wafer printing has been performed using the above operations.

In order to perform a practical interactive search even in broadcasting where it is not possible to request transmission by specifying an arbitrary image using such a device, image information of 5 to 6 frames or more is required as the number of frame memories installed on the receiving side. needs to be able to be stored and also performs a hierarchical search,
Storage of image information several times this amount is required. FIG. 3 shows an example in which the frame memory is composed of five pieces.

[Problem that the invention seeks to solve].

However, in the above conventional example, since the size of a high-definition frame memory is generally about 32 Mbits per frame, images of 5 to 6 frames or more are held on the receiving side for hierarchical search, etc. This was a huge burden in terms of cost.

In view of this, an object of the present invention is to provide an image receiving and reproducing device with a simple configuration.

[Means for Solving the Problems (and Effects)] In order to achieve the above-mentioned object, the writing means writes fst to the frame memory without decompressing the compressed image data, and the image data written to the frame memory is decompressed by a means for reading and decompressing the data.

[Example] Fig. 1 is a diagram that best represents the features of the present invention. frame memory.

Below, "System controller/operation flow" in Figures 1 and 4, and "Example of image data format" in Figure 5.
The operation will be explained below.

(1) When the power is turned on, the "system controller 104" waits for information regarding the header to be sent from the "compressed image decoder 102". Determine whether the current program mode is "r normal program" or "search program" from the detected header, and perform the following (2).
, (3) is performed.

(2) When receiving a "regular program" broadcast, "Frame memory B" is displayed while writing the decoded image to r-frame memory A 103J, and after the writing is completed, "r-frame memory A" is displayed, and the next sent image is displayed. is written to "frame memory B". This operating procedure can prevent the frame memory from displaying an unsightly image during writing.

This technology is already publicly known.

(3) When receiving the "menu screen" of the "search program" broadcast, the "menu screen" being received is decoded and written into the "frame memory A 103". After writing is completed, the "menu screen" will be displayed.

(4) When receiving the "searched screen" of the search image broadcast, the "searched screen" sent after the "menu screen" is written into the frame memory B 104J without being decoded. is used as a buffer to store the compressed image of the search screen as is.

(5) At the time of search, the "frame memory A 103" is on the display side, and the operator looks at the "menu screen" displayed on the "monitor 107" and selects the "search terminal 105" according to the displayed content. operate.

When the "compressed image decoder 102" receives a search command from the operator via the "system controller", it reads the specified search image, which has not yet been decompressed at this point, from the frame memory B 104J, and decompresses it. (Decode) processing and write to r frame memory A 103J. Through the above operations, the operator can obtain the required image by searching. It is also possible to perform a more hierarchical search if necessary.

[Other Embodiments] Figure 12 shows frame memory r-frame memory A103J and r-frame memory B, which were composed of two in Figure s1.
204J, r frame memory C205''.

In the method of the present invention, even when switching from the "menu screen" to the "searched screen" during a search, the
It is possible to prevent unsightly images caused by displaying frame warpage.

In addition, especially in thin-layer searches, it is necessary to store more images, and in that case, two frame memories are used as buffers to store compressed images of the searched screen. This makes it possible to accumulate about 10 to 20 images.

[Effects of the Invention] As explained above, by adding the function of directly writing and reading compressed image data to the frame memory without decompressing it to the image receiving and reproducing device, it is possible to perform a search that is practically sufficient on the receiving side of still image broadcasting, for example. It becomes possible to do this.

[Brief explanation of drawings]

Fig. 1 is a block diagram of an image receiving device embodying the present invention, Fig. 2 is a diagram explaining the configuration of another embodiment, Fig. 3 is a diagram showing a conventional example, and Fig. 4 is an operation flow of the system controller. It is. FIG. 5 is a diagram showing an example of an image data format. 101 is a receiving unit, 102 is a compressed image decoder, 103 is a frame memory interface, 104 is a system controller, 105 is a search terminal, 108 is a D/A converter, 107 is a monitor, 108 is a frame memory A, 1
(19 is a frame memory B1201 is a receiving unit, 202 is a compressed image decoder, 203 is a frame memory interface, 204 is a system controller, 205 is a search terminal, 206 is a D/A converter, 207 is a monitor, 2
08 is frame memory A, 209 is frame memory B,
210 is a frame memory C1; 301 is a receiving unit; 302 is a compressed image decoder; 303 is a frame memory interface; 304 is a system controller; 305 is a search terminal; 306 is a D/A converter; 307 is a monitor; 308 is a frame memory A; 3
09 is frame memory B, 310 is frame memory C,
311 is frame memory D, 312 is frame memory E
. 2nd trap (other n cost nose) 2nd trap (, heart [End I9]) 5th sound

Claims (1)

[Claims] In a compressed image receiving and reproducing device having a plurality of frame memories, there is provided a means for writing received data in a compressed state into the frame memory, and a means for reading and decompressing the data written in the frame memory from the frame memory. An image receiving and reproducing device characterized in that: