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Reproduction device, integrated circuit, reproduction method

A reproduction device and subtitle technology, which is applied in the field of text subtitle display, can solve the problems of lack of color number, inability to ensure gray scale, and fewer numbers, etc., to achieve the effect of avoiding color rendering errors, easy viewing, and guaranteed gray scale number

Inactive Publication Date: 2013-03-20
PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if a grayscale color is assigned to an index that is not used in any period in the entire area of ​​the subtitle stream, the number of indexes that can be selected as a grayscale color decreases, and those that can be used for grayscale color display Lack of number of colors
In this case, sufficient gradation for grayscale color display cannot be ensured, and the quality of subtitle characters cannot be improved

Method used

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  • Reproduction device, integrated circuit, reproduction method
  • Reproduction device, integrated circuit, reproduction method
  • Reproduction device, integrated circuit, reproduction method

Examples

Experimental program
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no. 1 Embodiment approach

[0067] First, an outline of the processing of this playback device will be described.

[0068] The playback device according to the first embodiment is a device that performs synchronous playback of an AV stream and a text subtitle stream according to playlist information. The AV stream is formed by multiplexing a video stream and an audio stream. However, the text subtitle stream is not multiplexed in the AV stream. The text subtitle stream is stored in a file different from the file storing the AV stream, and is recorded on the BD-ROM.

[0069] Describes playlist information. The playlist information includes one or more playback section information, and the playback section information includes information indicating a file name of the AV stream management information associated with the AV stream, information indicating a playback start point and a playback end point of the AV stream, and Flow number table. The playlist information, AV stream, and text subtitle stream ...

no. 2 Embodiment approach

[0181] In the first embodiment, the text subtitle decoder pre-analyzes the period during which the index is used before the playback of the playlist, but this embodiment does not perform this pre-analysis, and assigns the grayscale color to the color in real time. Lookup table's free index. Hereinafter, a playback device according to a second embodiment will be described with reference to the drawings.

[0182] Figure 20 It is a configuration diagram showing the preload memory 8, the text character decoder 9, the graphics plane 10, the conversion unit 11, and the font data storage unit 12 in the second embodiment.

[0183] In this embodiment, the same parts as those in the first embodiment are assigned the same reference numerals, and detailed description thereof will be omitted. The difference between the second embodiment and the first embodiment is that the character string display instruction analysis unit 21 , the color lookup table control unit 23 , and the drawing co...

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Abstract

A playback device for updating a character string in synchronization with a moving image displays a gradation character using an available index in a color lookup table. The playback device includes a pre-analysis unit that pre-analyzes character-string display instruction information in a text subtitle stream, thereby recognizing in advance the available index in the color lookup table and displaying the gradation character using the available index.

Description

technical field [0001] The present invention belongs to the technical field of text subtitle display technology. Background technique [0002] The so-called text subtitle display is a technology for synchronously displaying subtitles represented by text codes with each image in a movie. It is one of the unique technologies of BD-ROM (Blu-ray Disc Read Only Memory) playback devices. . [0003] The BD-ROM playback device controls so that character codes constituting subtitles are developed into a bitmap using fonts, and the bitmap is displayed in synchronization with each image in the video stream. [0004] Hereinafter, conventional subtitle display technology will be described. When displaying graphics and characters on a display device such as a commercial television monitor, the display content of each pixel is held in a frame memory. At this time, if color information such as α, R, G, and B values ​​are held for each pixel, the frame memory becomes larger. For example,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/93G09G5/02G09G5/06G09G5/22G09G5/30
CPCH04N5/85H04N9/802H04N9/8205H04N9/8042H04N9/8244
Inventor 六日市正弘
Owner PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA
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