KR20040053408A - Data broadcast browsing method and system - Google Patents

Abstract

PURPOSE: A data broadcasting browsing method and a system thereof are provided to perform decoding of data broadcasting contents including many image files by using a hardware, thereby enhancing display speed of browser. CONSTITUTION: When a data broadcasting is inputted, a parsing unit(210) parses digital streams including image contents and outputs the parsed streams to a H/W decoder(220). For example, when the kind of digital broadcasting is a HTML type, the parsing unit(220) parses only HTML contents and then outputs the HTML to the H/W decoder(220). The H/W decoder(220) decodes inputted data broadcasting contents in hardware, converts the decoded data into a format for displaying and then stores the format to a memory(230). When a formatting unit(211) meets with (mem addr=...), the formatting unit(211) reads out the decoded image from the corresponding address of the memory(230) and displays the image to a display unit(212). The display unit(212) displays the decoded image data to the corresponding position on a screen.

Description

Data broadcast browsing method and system

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a browser used for data broadcasting, and more particularly, to a data broadcasting browsing method and system for improving the display speed of a browser using a hardware decoder.

As digital TV (DTV) technology began to be utilized, data broadcasting using digital streams became possible, not just A / V (Audio / Video). The type of digital data broadcasting can be divided into Java series and HTML series. The HTML-based data broadcasting is realized by implementing a browser technology on an embedded operating system (OS) or RTOS (real time OS).

Here, in the general display form of data broadcasting, most of the screen configuration is implemented as a graphic image for a colorful screen effect. The image format used in the data broadcasting uses an image format that conforms to standards such as GIF, JPEG, and PNG.

1 is a diagram illustrating an example of decoding data broadcast contents in a conventional data broadcast receiver, wherein the data broadcast contents received in software are decoded and stored in a memory using an image decoder in a browser software, The control reads from memory and displays it on the TV screen.

However, since a large portion of the image is used on the screen, a limited resource (CPU-Time, Bus) is used in a general DTV data broadcasting receiver (for example, set-top box (STB) or DTV SET). Thus, in situations where multiple processes must coexist, decoding the image only with software (S / W) is a factor that significantly slows down the display speed of the browser.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to perform data broadcasting browsing that improves the display speed of a browser by performing decoding of data broadcasting contents including a large number of image files using hardware. To provide a method and system.

1 illustrates an example of decoding data broadcast contents in a conventional data broadcast receiver.

2 is a diagram showing an example of decoding data broadcast content according to the first embodiment of the present invention.

3 illustrates an example of decoding data broadcast content according to a second embodiment of the present invention.

4 is a block diagram of a data broadcast receiver according to the present invention;

Explanation of symbols for main parts of the drawings

210: parser 211: formatting unit

212: display unit 220: H / W decoder

230: memory

Data broadcasting browsing method and apparatus according to the present invention for achieving the above object, while the CPU performs a different task (Multi-task environment) by placing a H / W image decoder that can operate separately from the CPU in the system It is characterized by converting the image that takes up the majority of the content into hardware in advance by decoding it in a displayable format.

The data broadcasting browsing method embodying the above comprises the steps of: (a) parsing image content from the received data broadcasting; (b) decoding the parsed image content in hardware in accordance with a display format and storing in the memory; And (c) reading the image contents stored in the memory and displaying them on the screen.

The step (c) includes a formatting step of reading image contents stored at a specific address of the memory and outputting them together with format information, and displaying the image contents at a corresponding position on a screen according to the format information. do.

The step (c) includes a formatting step of securing only a space of an image when a specific address of the memory is met, and a display of reading the image content stored at a specific address of the memory and displaying the image content in a space designated in the formatting step. It is characterized by consisting of steps.

A data broadcasting browsing apparatus according to the present invention includes a browser for parsing and outputting image content from a received data broadcast, and displaying the decoded image content on a screen, and the image content parsed by the browser in a display format. And a memory for storing the data decoded by the H / W decoder at a specified specific address location and outputting the image content stored at the specific address to the browser, if necessary. It features.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of embodiments taken in conjunction with the accompanying drawings.

Hereinafter, with reference to the accompanying drawings illustrating the configuration and operation of the embodiment of the present invention, the configuration and operation of the present invention shown in the drawings and described by it will be described as at least one embodiment, By the technical spirit of the present invention described above and its core configuration and operation is not limited.

2 is a diagram illustrating an example of decoding data broadcast content in a data broadcast receiver according to a first embodiment of the present invention. The H / W decoder 220 is used to decode parsed data broadcast content in hardware.

That is, when data broadcasting is input, the parser 210 parses the digital stream including the image content and outputs the digital stream to the H / W decoder 220. For example, if the type of digital data broadcast is HTML-based, the parser 210 parses only HTML-based content and outputs the HTML-based content to the H / W decoder 220.

The H / W decoder 220 decodes the input data broadcasting content in hardware, converts it into a displayable format, and stores the same in the memory 230.

For example, if image content is input together with a tag such as <img ..>, the memory corresponding to the memory 230 after the memory allocation (for example, <mem addr = ...>) After decoding, the image content is decoded by the H / W decoder 220 and the decoding result can be written to the corresponding memory address.

Then, when the formatting unit 211 encounters <mem addr = ...>, the formatting unit 211 reads the image decoded at the corresponding address of the memory 230 and outputs the image to the display unit 212. The display unit 212 displays the decoded image data at a corresponding position on the screen.

Here, the parser 210, the formatter 211, and the display 212 may be configured by software in a browser or may be configured by hardware according to a designer.

In this case, the tag used when creating an HTML or XML document generally refers to the combination of angle brackets (<>, used as a delimiter) and the text between them, and the element refers to the combination of tags and contents. Metaphorically, a tag is like a tag that tells a web browser or the like to perform a specific action on what is contained between the tags.

In addition, the formatting unit 211 informs the browser how to display the corresponding contents as well as the image contents displayed through the user's graphic browser. That is, it includes a specific formatting command used to control the font size of the displayed content, the font style, the text placement method, and the like, and the HTML tag is provided through the user's browser. And how the video appears.

As described above, when the browser processes HTML-based content (for example, HTML, BML, X-HTML, and XML) in the browser, the parser 210 focuses on a parsing and formatting / display processor. In order to perform the decoding by transmitting the information of the image portion to the H / W decoder 220, the CPU performs other tasks in the meantime, and decoded so that the H / W decoder 220 is already displayable in the formatting or display phase The placed image data is read directly from the memory 230 and displayed on the screen.

Through this, the present invention can have a much faster display speed than the conventional method using only S / W decoding.

In this case, the H / W decoder 220 described above may use an ASIC or a chip already commercialized, or since the image format is given a clear standard.

On the other hand, if the system can draw the decoded data directly from the memory to the display device (for example, OSD memory area, frame buffer, etc.), the present invention can be displayed by the method as shown in FIG.

3 is a diagram illustrating an example of decoding data broadcast content in a data broadcast receiver according to a second embodiment of the present invention. The output of the memory 330 storing hardware decoded data by the H / W decoder 320 is shown in FIG. The output is directly output to the display unit 312 without passing through the formatting unit 311.

For example, if image content is input together with a tag such as <img ...>, after the memory allocation, it is replaced with a tag corresponding to the memory 330 (for example, <mem addr = ...>). The image content is decoded by the H / W decoder 320 and the decoded result is written to the corresponding memory address.

When the formatting unit 311 meets <mem addr = ..>, only the space of the corresponding image is secured. In this case, the display unit 312 reads the decoded image data from the memory 330 and uses a method such as DMA on a display area such as an OSD memory, which is designated by the formatting unit 311, to display an image for display. Draw the data.

4 is a block diagram of a data broadcasting receiver according to the present invention, wherein at least one H / W decoder corresponding to each image format is provided in a hardware part, and in FIG. 4, H / W for JPEG, PNG, and GIF is provided. An example is provided with decoders respectively. For example, if the input image content is a JPEG type, decoding is performed in the H / W decoder for JPEG and then stored in the memory.

On the other hand, if the multi-CPU system is possible, the same system can be configured even if the second CPU is dedicated to the image decoder instead of the H / W decoder.

As described above, according to the data broadcasting browsing method and system according to the present invention, by using the H / W decoder to decode the image information occupying most of the HTML-based content of the data broadcast, the effect of improving the display speed of the browser There is.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims.

Claims (4)

A data broadcast browsing method of a data broadcast receiver for decoding and storing a received data broadcast in a memory, the method comprising: (a) parsing image content from the received data broadcast; (b) decoding the parsed image content in hardware in accordance with a display format and storing in the memory; And and (c) reading image content stored in the memory and displaying the image content on a screen. The method of claim 1, wherein step (c) A formatting step of reading out image contents stored at a specific address of the memory and outputting them with format information; And displaying the image content at a corresponding position on the screen according to the format information. The method of claim 1, wherein step (c) A formatting step of ensuring only a space of an image when meeting a specific address of the memory; And a display step of reading the image contents stored in a specific address of the memory and displaying the image contents in a space designated in the formatting step. A browser for parsing and outputting image content from a received data broadcast and displaying the decoded image content on a screen; A H / W decoder for decoding the image content parsed by the browser in conformity with a display format in hardware; And And a memory for storing the data decoded by the H / W decoder at a specific address location, and outputting the image content stored at the specific address to the browser when necessary.