JP2000023060A - Video signal processor and its method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a video signal processor which outputs a still image of a video frame including telop. SOLUTION: A received video signal is stored in a frame memory 108. A telop detecting part 118 detects whether or not a video represented by the video signal includes telops. A central control unit 110 acquires a detected video frame including telops from the memory 108 and makes a color converting part 114 convert a video represented by the acquired video frame into print data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal processing apparatus and method, and more particularly to a video signal processing apparatus such as a television receiver and a method therefor.

[0002]

2. Description of the Related Art The so-called telops, such as news flashes, stock information, and weather forecasts of various places, which are transmitted together with video signals from a television broadcast station, are displayed in the corners of the screen of the television receiver together with the video of the program.

[0003]

However, the above technique has the following problems.

Since telops such as breaking news are displayed suddenly when watching a program or the like, it is difficult to predict them, and they are often overlooked.

[0005] Further, a telop of information having a large amount of information such as stock information is divided into a plurality of telops, and the display is also performed for a long time. Therefore, the viewer cannot obtain the information unless he / she keeps watching the telop. In some cases.

Further, even if there is information to be recorded, the telop disappears while preparing, for example, memo paper or writing utensils. For example, even if memo paper or writing utensils are prepared nearby, the telop may disappear during the transcription or move to the next telop, and it is difficult to copy the contents displayed on the telop.

An object of the present invention is to solve the above-mentioned problem, and an object of the present invention is to provide a video signal processing device and a method thereof capable of outputting a still image of a video frame including a telop. It is another object of the present invention to provide a video signal processing device and a video signal processing device capable of extracting and outputting a telop from a video frame.

[0008]

The present invention has the following configuration as one means for achieving the above object.

[0009] A video processing apparatus according to the present invention includes a storage unit for storing a received video signal, a detection unit for detecting a telop included in a video represented by the video signal, and a video frame including the detected telop. Output means for acquiring from the storage means, converting the video into a still image, and outputting the still image.

A storage unit for storing a received video signal; a detection unit for detecting a telop included in a video represented by the video signal; and a video frame including the detected telop from the storage unit. Output means for extracting the telop, converting the telop into a still image, and outputting the still image.

[0011] Further, storage means for storing the received video signal, detection means for detecting the start and end of a telop included in the video represented by the video signal, and at least one video frame including the detected telop. Output means for acquiring from the storage means, extracting the telop, converting the telop into a still image, and outputting the still image.

According to a video processing method of the present invention, a video signal is received and stored in a storage unit, a telop included in a video represented by the video signal is detected, and a video frame including the detected telop is stored in the storage unit. And converting the video represented by the obtained video frame into a still image and outputting the still image.

Further, the video signal is received and stored in the storage means, a telop included in the video represented by the video signal is detected, a video frame including the detected telop is obtained from the storage means, and the obtained video is obtained. A telop included in a frame is extracted, and the extracted telop is converted into a still image and output.

Further, the video signal is received and stored in the storage means, the start and end of the telop included in the video represented by the video signal are detected, and at least one video frame including the detected telop is stored in the storage means. From
A telop included in the obtained video frame is extracted, and the extracted telop is converted into a still image and output.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a video signal processing apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings.

[0016]

First Embodiment [Configuration] FIG. 1 is a block diagram showing a schematic configuration of a television receiver according to an embodiment of the present invention.

In FIG. 1, reference numeral 101 denotes a receiving unit for receiving a signal such as a radio wave modulated by a television signal transmitted from each broadcasting station, and 102 is controlled by a central control unit 110.
A tuner 103 for selecting a broadcast station by selecting a signal of a predetermined frequency, 103 is a demodulator for demodulating a television signal transmitted from the broadcast station selected by the tuner 102 according to a predetermined method, 104 is a signal A display unit 105 for displaying an image based on an image signal input via the switch 117;
Is an amplifier that is controlled by the central control unit 110 and amplifies the demodulated audio (sound) signal, and 106 is a speaker that reproduces sound based on the amplified audio signal.

The display unit 104 is a monitor using, for example, a CRT, a plasma display, a liquid crystal display, or the like.

Reference numeral 107 denotes an A / D converter for converting an analog video signal sent from the demodulation unit 103 into a digital video signal, and reference numeral 108 denotes a video signal converted by the A / D converter 107 into a digital signal. A frame memory 109 stores each frame, and a D / A converter 109 converts a digital video signal stored in the frame memory 108 into an analog video signal. The video signal returned to the analog signal is sent to the display unit 104 via the signal switch 117, and the video is displayed.
The switching operation of the signal switch 117 is performed by the central control unit 110.
Is controlled by

Reference numeral 110 denotes a central control unit for controlling each unit in accordance with a program command stored in the ROM 111, and reference numeral 112 denotes a timer for the central control unit 110 to measure time as needed. The timer 112 has a calendar function, a clock function, and the like, in addition to a clock function, and outputs a date, a day of the week, and a time in response to a request from the central control unit 110. It goes without saying that the central processing unit 110 is realized by a device such as a one-chip CPU.

Reference numeral 113 denotes a remote control receiving unit that receives a signal from a remote control device (not shown) and notifies the central control unit 110, and 114 denotes a color processing conversion unit that converts one frame of image data including a telop into print data. , 115 is a buffer memory in which print data is temporarily stored,
Reference numeral 116 denotes a printer interface (I / F) to which the printer 2 for printing and outputting images and characters is connected, and which transmits print data and transmits and receives various control signals to and from the printer 2.

As the printer 2, an ink jet printer or a thermal head printer is used. However, the present invention is not limited to this, and an electrophotographic printer using a laser beam, an LED, or a liquid crystal shutter may be used. Good. Similarly, the printer I / F 116 is not limited, and may be a general-purpose parallel interface such as Centronics, SCSI, GPIB, or RS232C, RS422, USB (U.
niversal Serial Bus) or a serial interface such as IEEE1394, or may be wired or wireless.

Reference numeral 118 denotes a telop detecting unit for detecting that a telop is included in a frame of the demodulated video signal. FIG. 2 is a block diagram illustrating a configuration example of the telop detection unit 118.

In FIG. 2, a video signal demodulated by a demodulator 103 is input to a horizontal high-pass filter (H-HPF) 121 and a vertical high-pass filter (V-HPF) 122 via an input terminal 120. You. Outputs of the filters 121 and 122 are input to slice circuits 123 and 124, respectively. Each of the slice circuits 123 and 124 supplies a counted signal to the counting circuit 125 when the luminance level exceeds a preset level.

For example, a video signal representing a character or the like contains a large amount of high frequency components because the luminance level greatly changes at the edge of the character. Therefore, by slicing this high frequency component, it is possible to detect the presence or absence of an image of a character or a symbol included in the video signal.

The counting circuit 125 counts the signals to be counted in a predetermined period in a predetermined image area, and when the counted value exceeds a predetermined value, outputs a telop detection signal to the output terminal 127 assuming that the telop has started. . After the telop detection signal is output, if the count value in the predetermined period does not exceed the predetermined value, the telop detection signal is canceled and the telop detection signal is released. The area to be counted by the counting circuit 125 is specified by the counting area generator 126. The counting area generator 126 specifies a counting area based on the horizontal synchronization signal H and the vertical synchronization signal V of the input video signal.

[Operation] The power of the television receiver 1 is turned on by operating a remote controller (not shown), and a broadcasting station is selected by operating the remote controller.
It is assumed that an image of a certain program is displayed on the display unit 104. At this time, the processing executed by the central control unit 110 of the television receiver 1 is shown in FIG.

The central control unit 110 includes a remote control receiving unit 1
The signal received by 13 is interpreted, and for example, if tuning is instructed, the tuner 102 is controlled to select the designated broadcasting station (frequency). Thereby, the television signal transmitted from the designated broadcast station is sent to the demodulation unit 103,
The video signal demodulated by the demodulation unit 103 is supplied to a signal switch 117.
The demodulated audio signal is sent to the display unit 104 via the, and is amplified by the amplifier 105 and sent to the speaker 106. Thereby, the video and sound of the program of the broadcasting station selected by the user are reproduced (step S101).

On the other hand, the demodulated video signal is also supplied to the telop detecting section 118, and when the telop detecting section 118 detects that the telop exists in the video frame (step S1).
(S102), the central control unit 110 that has received the notification reads the video data including the telop from the frame memory 108 (step S103). The read video data is subjected to well-known processing such as input gamma correction, luminance / density conversion, masking correction, UCR processing and black generation, output gamma correction, and quantization by the color processing conversion unit 114.
The data is converted into CK print data (step S104). The obtained print data is temporarily stored in the buffer memory 115, and then sent to the printer 2 via the printer I / F 116 (step S105).

FIG. 4 is a diagram showing an example of a printout obtained in this manner. On a recording paper 301, an image 302 of a frame including a telop and an image 303 of a telop are recorded.

As described above, according to the present embodiment, since the screen of the frame including the telop is automatically printed out, even if the telop is missed, it can be surely seen later.

Whether or not to automatically output a frame including a telop can be set in advance.
Even when the automatic print output is set to off, it is possible to print out by giving an instruction by operating a remote control device or the like. In that case, the central control unit 110 that has received a specific command through the remote control receiver 113
The signal switch 117 connects the D / A converter 109 and the display unit 104 to enable the user to select and instruct the telop to be printed out, and includes the telop stored in the frame memory 108. The display unit 104 displays the frame. When there are a plurality of frames including the telop, the central control unit 110 sequentially displays the frames according to the signal from the remote control device, and according to the signal from the remote control device, displays the frame or telop currently displayed on the display unit 104. It is also possible to convert the print data into print data and have the printer 2 print it. This makes it possible to reliably print out only the telop desired by the user.

The communication between the remote control device and the remote control receiving unit 113 is generally performed by infrared rays, but may be performed by radio waves or audio signals.

[0034]

Second Embodiment Hereinafter, a video signal processing apparatus according to a second embodiment of the present invention will be described. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 5 is a block diagram showing a configuration example of a television receiver according to the second embodiment, in which a telop extraction unit 119 is added to the configuration shown in FIG.

FIG. 6 is a flowchart for explaining the operation of the second embodiment. Steps S101 to S103 and S104
The processing in S105 is the same as that in FIG.

In this embodiment, a telop image is extracted from the telop image from the video data of the frame including the telop read from the frame memory 108 in step S103.
The extracted telop image is converted into print data by the color processing conversion unit 114 (step S104).

The telop image is extracted by setting the telop area based on the period during which the telop detection signal indicating the image area containing the telop was output, and binarizing the image contained in the telop image. .

FIG. 7 shows an example of a printout obtained in this manner. A telop image functioning as a weather forecast is printed out on a recording paper 401.

As described above, in the second embodiment, the first
In addition to providing the same effects as the embodiment, since only the telop image is printed out, the time required for the printout is reduced, and the ink consumption can be reduced in the ink jet type printer, and the thermal head type In the case of a printer, consumption of the ink ribbon can be reduced.

[0041]

Third Embodiment Hereinafter, a video signal processing apparatus according to a third embodiment of the present invention will be described. Note that, in the present embodiment, for configurations substantially similar to those in the first and second embodiments,
The same reference numerals are given and the detailed description is omitted.

The telop described in the present embodiment is long information, such as stock information, in which the telop itself does not fit on one screen. FIG. 8 is a flowchart for explaining the operation of the third embodiment.
The processing of 05 is the same as that of FIG.

In the present embodiment, in step S307,
It is determined whether or not the telop image has ended based on the output signal of the telop detection unit 118. Specifically, for example, the timer 112
When the telop detection signal indicating that the telop is detected is not output from the telop detecting unit 118 for a predetermined time, it is determined that the telop has ended. If the telop has not ended, the process returns to step S103, and steps S103 to S307 are repeated. On the other hand, if it is determined that the telop has ended, the recording paper is discharged to the printer 2 to end the printing (step S308).

FIG. 9 is a diagram showing an example of the print output obtained in this way. The first recording paper 501 and the second recording paper 502 have telop images 503 and 504, respectively.
Is recorded.

As described above, according to this embodiment, the same effects as those of the first and second embodiments can be obtained, and information including long telops such as stock information can be printed out.

According to each of the above embodiments, when a telop is played on a broadcast of a selected broadcasting station, an image including the telop is automatically printed out without using a special printer. You won't miss a telop, and you won't have to rush to copy the telop.

Further, since only the telop can be extracted and printed out, the time required for printing can be shortened, and the consumption of a recording agent such as ink, an ink ribbon or a toner of the printer can be suppressed.

Further, by printing a long telop such as stock information collectively, it is not necessary to watch the screen for a long time.

Further, a print output in which a telop is recorded can be obtained even if the user is away from a television receiver or a printer.

[0050]

[Other Embodiments] Even if the present invention is applied to a system including a plurality of devices (for example, a host computer, an interface device, a reader, a printer, etc.), an apparatus (for example, a copying machine) Machine, facsimile machine, etc.).

An object of the present invention is to supply a storage medium storing a program code of software for realizing the functions of the above-described embodiments to a system or an apparatus, and to provide a computer (or a CPU or M
Needless to say, this can also be achieved by the PU) reading and executing the program code stored in the storage medium. In this case, the program code itself read from the storage medium implements the functions of the above-described embodiment, and the storage medium storing the program code constitutes the present invention. When the computer executes the readout program code, not only the functions of the above-described embodiments are realized, but also the OS running on the computer based on the instructions of the program code.
It goes without saying that an (operating system) performs a part or all of the actual processing, and the processing realizes the functions of the above-described embodiments.

Further, after the program code read from the storage medium is written into a memory provided in a function expansion card inserted into the computer or a function expansion unit connected to the computer, based on the instruction of the program code, It goes without saying that the CPU included in the function expansion card or the function expansion unit performs part or all of the actual processing, and the processing realizes the functions of the above-described embodiments.

[0053]

As described above, according to the present invention,
A video signal processing device and a method for outputting a still image of a video frame including a telop can be provided.
Further, it is possible to provide a video signal processing device and a method for extracting and outputting a telop from a video frame.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a television receiver according to an embodiment of the present invention;

FIG. 2 is a block diagram showing a configuration example of a telop detection unit shown in FIG. 1;

FIG. 3 is a flowchart for explaining the operation of the first embodiment,

FIG. 4 is a diagram illustrating an example of a print output according to the first embodiment;

FIG. 5 is a block diagram showing a schematic configuration of a television receiver according to a second embodiment;

FIG. 6 is a flowchart for explaining an operation in the second embodiment,

FIG. 7 is a diagram illustrating an example of a print output according to the second embodiment;

FIG. 8 is a flowchart for explaining the operation in the third embodiment,

FIG. 9 is a diagram illustrating an example of a print output according to the third embodiment.

Claims (12)

[Claims] A storage unit that stores a received video signal; a detection unit that detects a telop included in a video represented by the video signal; and a video frame that includes the detected telop is acquired from the storage unit. Output means for converting the video into a still image and outputting the still image. 2. A storage unit for storing a received video signal, a detection unit for detecting a telop included in a video represented by the video signal, and acquiring a video frame including the detected telop from the storage unit; An output unit for extracting the telop, converting the telop into a still image, and outputting the still image. 3. A storage unit for storing a received video signal, a detection unit for detecting a start and an end of a telop included in a video represented by the video signal, and at least one video frame including the detected telop. Output means for obtaining the telop from the storage means, extracting the telop, converting the telop into a still image, and outputting the still image. 4. The video according to claim 3, wherein the output unit extracts a telop included in a period from the start to the end of the detected telop and outputs the extracted telop as a series of image data. Signal processing device. 5. A receiving means for receiving the video signal, the receiving means comprising: a selecting means for selecting a broadcasting station; and a video signal transmitted from the selected broadcasting station. 5. The video signal processing device according to claim 1, further comprising: a reproducing unit configured to reproduce video and sound based on the video signal. 6. The video signal processing device according to claim 1, wherein the still image is output to a printer device, and a visible image is formed on a recording medium. 7. A video signal is received and stored in a storage unit, a telop included in a video represented by the video signal is detected, a video frame including the detected telop is obtained from the storage unit, and the obtained video is obtained. A video signal processing method comprising converting a video represented by a frame into a still image and outputting the still image. 8. A video signal is received and stored in a storage unit, a telop included in a video represented by the video signal is detected, a video frame including the detected telop is obtained from the storage unit, and the obtained video is obtained. A video signal processing method comprising extracting a telop included in a frame, converting the extracted telop into a still image, and outputting the still image. 9. A video signal is received and stored in a storage unit, a start and an end of a telop included in a video represented by the video signal are detected, and at least one video frame including the detected telop is stored in the storage unit. And extracting a telop included in the obtained video frame, converting the extracted telop into a still image, and outputting the still image. 10. A recording medium on which a program code of a video signal processing is recorded, wherein a code of a step of receiving the video signal and storing the video signal in a storage unit is detected, and a telop included in a video represented by the video signal is detected. A code of a step, a code of a step of obtaining a video frame including the detected telop from the storage unit, and a code of a step of converting a video represented by the obtained video frame into a still image and outputting the still image. Recording medium. 11. A recording medium on which a program code of a video signal processing is recorded, wherein a code of a step of receiving a video signal and storing the video signal in a storage unit is detected, and a telop included in a video represented by the video signal is detected. A code for a step, a code for a step of obtaining a video frame including the detected telop from the storage means, a code for a step of extracting a telop included in the obtained video frame, and converting the extracted telop into a still image And a step output code. 12. A recording medium on which a program code of a video signal processing is recorded, wherein: a code of a step of receiving a video signal and storing the video signal in a storage means; A code of a step of detecting the end, a code of a step of obtaining at least one video frame including the detected telop from the storage unit, and a code of a step of extracting a telop included in the obtained video frame. A code for converting a telop into a still image and outputting the still image.