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Method for encoding input image, method and apparatus for displaying an encoded image

An input image, encoded technology, applied in the field of image processing, can solve the problem of wasting storage space, achieve the effect of effective encoding and decoding, and reduce the image playback time

Inactive Publication Date: 2009-01-07
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, when outputting bitmaps to playback devices with lower color depths, some color values ​​of the palette are not used but still need to be stored, thus wasting storage space

Method used

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  • Method for encoding input image, method and apparatus for displaying an encoded image
  • Method for encoding input image, method and apparatus for displaying an encoded image
  • Method for encoding input image, method and apparatus for displaying an encoded image

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Embodiment Construction

[0018] Embodiments of the present invention provide methods and devices for encoding input images. The image processing system utilizes efficient encoding of playback device information to reduce image decoding time. This system consists of encoder and decoder. The encoder converts the original pixel color value (pixel color value) of the input image into a pixel color value suitable for the playback device, obtains multiple unique values ​​(unique value) from the converted pixel color value, and calculates bits per pixel (Bits -Per-Pixel, hereinafter referred to as BPP) value, wherein, the BPP value can represent all obtained unique pixel color values, mark the unique pixel color value of each pixel data index with the length of the BPP value, and generate the unique pixel color value containing the pixel data An indexed palette of unique pixel color values ​​obtained. The encoder replaces the converted pixel color values ​​of the image with the corresponding pixel data ind...

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Abstract

This invention provides a method for displaying encoded images, method and apparatus for playing the encoded images. The apparatus comprises a display device and a decoding unit. The decoding unit acquires a Bit-Per-Pixel (BPP) value from an encoded image, acquires a first bit stream from a first encoded image, acquires multiple first pixel data indices by segmenting the first bit stream every lengths of the BPP value, acquires a first pixel color value of each pixel data index by retrieving a palette comprising multiple unique pixel color values respectively labeled by multiple first pixel data indices, and outputs the acquired first pixel color values so as to play the first encoded image. The method and apparatus for playing the encoded images provided this invention play the encoded images through acquiring the pixel color values of the pixel data indices and outputting the acquired pixel color values to the player, so that coding and decoding can be effectively executed and the image playing time can be reduced.

Description

technical field [0001] The present invention relates to image processing, in particular to methods and devices for encoding and decoding images to reduce image playback time and image size, in particular to a method for encoding input images and a method and method for playing encoded images device. Background technique [0002] Due to the device-independent design of the bitmap palette of Windows (Windows is a commonly used operating system), it is stored as 24-bit true color. In order to output a bitmap to a playback device with less color depth, for example, a bitmap with a 16-bit color depth, it is necessary to convert the color format. For handheld devices, the color depth of the playback device is usually less than 24 bits. For example, for a handheld device with an 18-bit LCD screen, 6 bits are wasted in the bitmap used to play 24 bits. [0003] At the same time, the image includes pixel data. In order to reduce the storage capacity used to store the bitmap image, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N11/04
CPCH04N19/00303H04N19/00315H04N19/00533H04N19/00484H04N19/00545H04N19/46H04N19/186H04N19/182H04N19/44H04N19/423
Inventor 洪智玮
Owner MEDIATEK INC
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