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Method of overlaying caption in digital compression video code stream

A subtitle and video technology, applied in superimposing subtitles, superimposing subtitles in the digital compressed video code stream, can solve the problems of subtitle display impact, data redundancy, etc., achieve good visual effect, convenient implementation, and convenient effect

Inactive Publication Date: 2005-01-05
AMOLOGIC (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, the patented technology has the following deficiencies: (1) subtitles are stored in an interlaced manner
(2) Both the subtitle palette information and the highlight area palette information are in the code stream, which not only makes the data very redundant, but also will inevitably have a certain impact on the subtitle display when performing a search operation

Method used

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  • Method of overlaying caption in digital compression video code stream
  • Method of overlaying caption in digital compression video code stream
  • Method of overlaying caption in digital compression video code stream

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Embodiment Construction

[0019] Before describing the preferred embodiment according to the present invention, the conventions, numerical representations and basic type descriptions that will be used when describing the embodiment are given earlier. These information constitute the basic knowledge or data description method of the preferred embodiment. The description is helpful for a better understanding of the preferred embodiment.

[0020] agreement

[0021] Bit ordering: All multi-bit bit numbers are graphically represented with the most significant bit (msb) on the left and the least significant bit (lsb) on the right. The most significant bit is the bit with the highest bit number. As shown in the figure below, bit i represents the bit whose bit position is i.

[0022] Table 1 8-bit byte sorting example

[0023] msb lsb

[0024]

[0025] Byte ordering: Data that requires more than 8 bits to represent occupies more than one byte in the video disc. For all of this data, the byte order on t...

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PUM

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Abstract

This invention relates to a method for overlapping captions in a digital compression video ASCII stream. The composite ASCII stream is finished by composite process of the system which composites audio, video compressed streams, starting time of captions and a caption data region including caption end time, a display region, a forced display region and a character lattice data composite by its character documents and character lattice base. The command control file in the pilot system is composed of a caption coloring board, and a mixed degree control data generated by a disk generation system.

Description

technical field [0001] The invention relates to a method for superimposing subtitles, in particular to a method for superimposing subtitles in digitally compressed video streams. It belongs to the technical field of audio-visual communication. Background technique [0002] With the dissemination of video information all over the world, the superposition of subtitles in various languages ​​has become an effective way to eliminate language barriers. At present, there are the following ways to superimpose subtitles and videos: (1) directly superimpose subtitles to the video layer before encoding. Although this is simple, the subtitles destroy the integrity of the video picture, and the user cannot freely select and close the subtitles. (2) Subtitles are stored in a separate file in the form of character internal codes. During video playback, the player reads the character internal codes, obtains display dot matrix information from the corresponding font library, and superimpos...

Claims

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Application Information

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IPC IPC(8): H04N5/278
Inventor 钟培峰陈实
Owner AMOLOGIC (SHANGHAI) CO LTD
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