JPH05308620A - Character information decoding display device - Google Patents

Abstract

PURPOSE:To enable language learning and the fast reading of information to be performed by enabling titles for television signals reproduced at various kinds of speed from video equipment to be displayed by providing functions to permit, prohibit, and hold the decoder of title information compulsorily from the outside by a title information decoding display device. CONSTITUTION:A character information decoder part 1 decodes all the bit data of the title information transferred one after another at every frame of television signal when a signal from a decode control part 5 shows permission, and stores the title information existing on the odd-numbered field of the following frame in a character information storage part 3 until title information transfer completion information arrives when receiving a title information transfer start command. The character information decoder part 1 Issues a command to a display control part 3 when a title display-on command arrives, and outputs a television signal with title by superimposing the title information on an inputted television signal as a video signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a character information decoding display device (hereinafter referred to as a decoder) for decoding and displaying character information (hereinafter referred to as caption information) on a vertical blanking period related to the sound of a television program. It is about.

[0002]

2. Description of the Related Art In recent years, a service for displaying audio as caption information on a screen is provided in television broadcasting for people with hearing impairments, and a decoder for decoding and displaying such caption information has been developed. ..

A conventional decoder will be described below.
FIG. 5 shows the structure of a conventional decoder. In FIG. 4, 1 is a character information decoding unit. Reference numeral 2 is a character information storage unit. 3 is a display control unit. Reference numeral 4 is an image mixing unit.

The operation of the decoder configured as described above will be described below. First, the character information decoding unit 1 of the decoder counts the number of horizontal synchronizing signals starting from the vertical synchronizing signal of the television signal, and calculates the odd field portion carrying the caption information. Then, the character information decoding unit 1 decodes all the bit data of the subtitle information successively transferred for each frame as shown in FIG. 3, and when the subtitle information transfer start command shown in FIG. The subtitle information for each frame is stored in the text information storage unit 2 until the subtitle information transfer end information shown in FIG. 3 comes.
When the subtitle display ON command shown in FIG. 3 is received, the character information decoding unit 1 issues a command to the display control unit 3, superimposes the subtitle information on the input TV signal as a video signal, and outputs the subtitled TV signal. FIG. 2 shows an example of a television screen on which subtitle information is superimposed.

[0005]

However, in the above-mentioned conventional configuration, the field of the television signal is omitted or extra for the television signal which is specially reproduced by the video equipment at various speeds such as double speed or 0.75 speed. There was a problem in that the characters of the subtitles would be missing or overlapped or could not be displayed at all due to entering.

The present invention solves the above-mentioned problems of the prior art by allowing the degoder to permit / prohibit decryption and retain character information by a control signal from the outside.
An object of the present invention is to provide a character information decoding / displaying device which can be used in combination with a video device and can see subtitles while watching fast or seeing subtitles while watching slow.

[0007]

In order to achieve this object, in a character information decoding display device of the present invention, a character for decoding character broadcasting information superimposed during a vertical blanking period of a video signal of a television signal. An information decoding unit, a storage unit that stores teletext information, a display control unit that creates a television signal from the teletext information, and a video mixing unit that superimposes a television signal from the outside and a television signal of text information, It has a configuration capable of temporarily permitting / prohibiting the decoding of the teletext information by an external command and retaining the text information in the storage unit.

[0008]

With this configuration, the decoding of the character information of the TV signal can be temporarily prohibited and held, and the subtitle information can be displayed even with the TV signal of 2x speed or 0.75x speed. By combining with a video device as a tool for learning English or a quick reference of information, a better character information decoding display device can be provided.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 is a character information decoding section. Reference numeral 2 is a character information storage unit. 3 is a display control unit. Reference numeral 4 is an image mixing unit. Reference numeral 5 is a decoding control unit.

The operation of the decoder configured as described above will be described. When the video is played back in slow motion, the regular subtitle information shown in FIG. 3 is such that the information of frame 2 is continuously output twice as shown in a of FIG. When the video equipment transmits the second frame 2, it outputs a decoding control signal as shown in b of FIG. 4, the decoding control section 5 of FIG. 1 decodes it, and the decoding of the character information decoding section 1 is prohibited, At the same time, by sending a data holding command to the character information storage unit 2 and holding it, even when the video device is slow-played back, it is not erroneous erroneous subtitle information as in c in FIG. 4 but correct as in d in FIG. Subtitles can be displayed.

As described above, according to this embodiment, it is possible to correctly display the subtitle information even for the television signal from the video device which is slow-reproduced.

[0013]

As described above, according to the present invention, by providing the decoding control section, it is possible to realize an excellent function of correctly displaying subtitles even with a television signal reproduced from a video device at various speeds. ..

[Brief description of drawings]

FIG. 1 is a block diagram of a character information decoding device according to an embodiment of the present invention.

FIG. 2 is a display screen diagram showing an example of a television screen with superimposed display of subtitles, for explaining the operation of the character information decoding display device in the same embodiment.

FIG. 3 is a schematic diagram showing an example of subtitle character information data transmission for explaining the operation of the character information decoding display device in the same embodiment.

4A is a schematic diagram showing an example of a character information string of a television signal at the time of slow reproduction for explaining the operation of the character information decoding display device in the same embodiment. FIG. 4B is a decoder from a video device in the same embodiment. (C) A display diagram showing the contents of characters displayed when the decoding control signal is not used in the same embodiment (d) Displayed when the decoding control signal is used in the same embodiment Display diagram showing character contents

FIG. 5 is a block diagram showing a configuration of a conventional character information decoding device.

[Explanation of symbols]

 1 Character Information Decoding Section 2 Character Information Storage Section 3 Display Control Section 4 Video Mixing Section 5 Decoding Control Section

Claims (1)

[Claims] 1. A character information decoding unit for decoding the character broadcasting information superimposed during a vertical blanking period of a video signal of a television, a storage unit for storing the character broadcasting information from the character information decoding unit, and the above-mentioned. It has a display control unit that creates a television signal from teletext information, and a video mixing unit that superimposes the television signal from the outside and the television signal of the teletext information, and decodes the teletext information by an external command. A character information decoding display device having a function of controlling permission and prohibition and holding the character broadcast information in the storage unit.