JP3521624B2 - Video recorder - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video recorder which stores a video image in a semiconductor memory and instantly records, reproduces or edits it.

[0002]

2. Description of the Related Art In recent years, RAM (Random Access Memor)
y: A video recorder (generally referred to as a non-linear video recorder or the like) for recording a video signal in a semiconductor memory device such as a readable / writable memory) is becoming popular.

Along with this, not only for commercial use such as broadcasting, but also for personal use, for example, as a peripheral device of a personal computer, a video recorder for recording a television broadcast screen for a short time, or a buffer of a video printer. Demand for inexpensive semiconductor video recorders is expected.

Generally, a semiconductor video recorder includes an A / D (Analog / Digital) converter for converting an input analog video signal into digital video data, a semiconductor video memory for storing digital video data, and a data for a video memory. It has a control circuit for controlling reading and writing, a D / A converter for converting digital video data read from a video memory into an analog video signal, and an operation unit for instructing recording and reproduction of video images.

The operating section generally has a display section, an operation input section, and an input / output interface for connecting to the above-mentioned control circuit. Most commercial semiconductor video recorders have a jog shuttle, a joystick, or a slider as an operation input section. For personal use, the operation section is composed of a personal computer, and a CRT (Cathode Ray Tube: image by cathode ray emission). The operation input section displayed on the display tube) is often operated by a mouse or a trackball.

The above-mentioned operation unit converts the operation input amount (for example, slider movement amount) into the operation input unit into numerical data and supplies it to the above-mentioned control circuit. The control circuit changes the read address of the video memory by an amount corresponding to this numerical data. Alternatively, the read address is changed by a fixed amount every predetermined time in response to the operation input. At this time, digital video data sequentially read is converted into an analog video signal and output.

[0007]

However, conventionally, since the operation amount of the operation unit and the change amount of the read address of the video memory correspond linearly, it is necessary to continuously reproduce and edit the digital video data. In such a case, unless the operation unit is operated irregularly, only a relatively monotonous linear motion is usually obtained, and the operability is poor when, for example, a special reproduction effect is realized.

Further, for example, when searching for a fine motion of a moving image or when searching for a desired one frame (one screen) from long-time digital video data, the operation is not easy. .

The present invention has been made under such a background, and digital video data can be instantaneously read from a video memory at an arbitrary timing, and an intuitive image can be obtained by a user's operation such as stop and variable speed reproduction. It is intended to provide a playable video recorder.

[0010]

To solve the problems described above SUMMARY OF THE INVENTION, in the invention described in claim 1, a video memory for recording digital converted video signal, read out from the video memory a digital / analog conversion means to analog conversion on the digital video data,
Conversion for converting the reproduced frame time of the recorded video signal to the video memory, and the playback operator for instructing the operation position, the playback frame time indicated by the reproduction operator in the corresponding frame address on the video memory and the conversion table setting means to set the table, before
Display the playback address curve set in the conversion table
Display means for displaying,
The reproduction address curve is editable .

According to the present invention, when the reproduction frame time of the video signal recorded in the video memory is instructed by the reproduction operator, the conversion table setting means stores the reproduction frame time on the corresponding video memory according to the set conversion table. The digital / analog conversion means performs analog conversion on the digital video data converted into the frame address and read from the frame address of the video memory in which the digitally converted video signal is recorded. In addition, the playback address card set in the conversion table
Is displayed and can be edited by the display means.
Edit the playback address curve while viewing it
That is, the contents of the conversion table can be edited.
More conversion table to be edited in this way, for example with respect to an instruction of the reproduction frame time varying at a predetermined period, the video images shift is non-uniform or reverse playback. sand
That is, the playback address car set in this conversion table.
Allows you to adjust the playback speed of the video image at any time.
You can make a difference.

According to a second aspect of the invention, in the video recorder according to the first aspect, the conversion table setting means has a plurality of storage areas for setting a plurality of different conversion tables , respectively. Stored in the storage area
The reproduction address set in the plurality of conversion tables
Characterized in that it have a selection means to select one of the curves. According to the present invention, among the plurality of conversion tables,
One conversion table corresponding to the video image being played back is selected instantaneously.

Further, in the invention according to claim 3,
Video memo to record digitally converted video signal
And the digital video read from the video memory.
Digital / analog conversion that converts video data to analog
And a video signal recorded in the video memory.
Playback operation in which the playback frame time is specified by the operating position
Creator and playback frame specified by the playback operator
The frame address in the video memory corresponding to the time
Set a conversion table to convert
It has a plurality of storage areas for setting the conversion table,
Set in the multiple conversion tables stored in the storage area
Selection to select one of the reproduced address curves
Conversion table setting means having means, and the conversion table
Means for displaying the playback address curve set to
And is provided . According to the invention,
Video signal recorded in video memory by live controller
If you specify the playback frame time of, the conversion table setting
The means is a playback frame
Image to the frame address in the corresponding video memory.
And the video signal on which the digitally converted video signal is recorded.
The data read from the frame address in the deo memory
Digital / analog conversion means for digital video data
Converts to analog. Also, of the multiple conversion tables,
One conversion table corresponding to the video image being played
Sometimes selected.

According to the invention of claim 4,
The video recorder according to claim 3, wherein the playback recorder is used.
The dress curve is characterized by being editable. this
According to the invention, the playback address set in the conversion table
The curves are visible and editable by the display means
While observing the displayed playback address curve,
Editing, that is, editing the contents of the conversion table
it can. An example with a conversion table edited in this way
For example, it is recommended that the playback frame time
Then, the video image is played at variable speed, unequal speed or reverse rotation.
It That is, the playback speed of the video image is slowed down at any time.
Can make sudden changes. Also, in claim 5.
In the invention of claim 1, claim 1 or claim 2 or claim
In the video recorder according to any one of Items 4,
Addition of input means for editing the playback address curve
Prepare for. Use this input means to play address
The edit is made.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments will be described below in order to make the present invention easier to understand. Such an embodiment shows one aspect of the present invention, and does not limit the present invention. It can be arbitrarily changed within the scope of the present invention.

FIG. 1 is a block diagram showing the configuration of the video recorder 1 according to the present embodiment. 1 in FIG.
Is a CPU (Central Processing Unit), and a bus 4 for exchanging addresses and data with each unit described later is connected to the CPU 3. The bus 4 is connected to various parts as described below.

Reference numeral 5 is a memory for storing a procedure of processing by the CPU 3 and a numerical value related to the processing. This memory 5
RAM, ROM (Read Only Memory), magnetic storage device, etc. are also collectively referred to.

Reference numeral 6 is an A / D converter, which converts the input analog video signal into digital video data.
The A / D converter 6 also includes a circuit for extracting the synchronization signal component from the analog video signal and setting the timing.

Reference numeral 7 is a video memory for storing the digital video signal at a predetermined frame address sequentially determined at each time from the lowest when the analog video signal is taken in. The storage capacity of the video memory 7 is determined by the product of the number of pixels, the number of color gradations, the sampling frequency, and the maximum recording time.

Reference numeral 8 is a reproduction table memory, which is specifically constituted by a memory such as a RAM or a ROM having a plurality of regions for storing a curve of a frame address to be output with respect to an input frame time. There is. The change curves stored in these plural areas correspond to the conversion table of the present invention, and the reproduction table memory 8
Corresponds to the conversion table setting means as a whole.

The reproduction table memory 8 selects which one of the signal line S _t to which the frame time indicating the time from the start of reproduction of the video image is supplied and the reproduction table stored in each of the plurality of areas is used. It has a selection line S _SEL and a signal line S _a for outputting a frame address based on the frame time and the selected reproduction table.

Reference numeral 9 denotes a D / A converter, which converts the digital video data read from the video memory 7 at a predetermined timing based on the above-mentioned reproduction table into an analog signal and outputs an analog video signal. 10 is the I / F
(Input / output interface), the bus 4 and the operation unit 2
Numerical data, operation commands, etc. are transmitted and received to and from.

FIG. 2 shows an image display (C
It is a figure which shows the mode of the control window 21 displayed on a part of RT display, a liquid crystal display, etc. (illustration omitted).

Reference numeral 22 shown in FIG. 2 is a cursor. The cursor 22 moves on the control window 21 in proportion to a movement vector (two-dimensional vector) of a mouse (not shown) included in the operation unit.

The cursor 22 is moved to buttons 23, 23 ...
・ By pressing the mouse button of the mouse (not shown) at any position of
It is possible to obtain the same effect as pressing 3, 23 ...

Reference numeral 24 is a slider, which determines the reproduction frame of the video image stored in the video recorder 1. The position of the slider 24 can be changed by moving the mouse to the position of the slider 24 and moving the mouse while pressing a mouse button (not shown).

In the present embodiment, the left end of the slider 24 is allocated at the start of recording or reproducing the video image and the right end of the slider 24 is allocated at the end regardless of the recording time of the video image.

A reproduction table selection key group 25 is a key group for selecting one of a plurality of reproduction address curves stored in each area of the reproduction table memory 8 as described later. 26 is a group of operation keys, which is a general VT
It is a key group for instructing recording and reproducing operations like R (Video Tape Recoder). The operations of the reproduction table selection key group 25 and the operation key group 26 are the same as those of the buttons 23, 23, ...

Reference numeral 27 is an information display section, which can display a video image currently being reproduced, a selected reproduction address curve, and the like. When the reproduction address curve is displayed on this information display section, the cursor 2
By moving 2 according to the arbitrary position of the curve,
It is also possible to edit (change) the shape of the reproduction address curve while visually observing it.

As a result, the reproduction address curve recorded in the RAM of the reproduction table memory 8 can be rewritten. That is, after playing the video image once,
It is possible to reset the reproduction address curve having a shape adapted to the video image stored in the video memory 7.

FIG. 3 is a diagram showing an example of the reproduction address curve stored in the reproduction table memory 8. In each drawing shown in FIG. 3, the left and right of the horizontal axis correspond to the left and right positions of the slider 24, and the lower side of the vertical axis has a smaller address (that is, the video image stored in the digital video data is It will be earlier.) Hereinafter, the image effect obtained when the slider 24 is moved from the left side to the right side of the moving range at a standard constant speed in each case of FIG. 3 will be described.

The reproduction address curve shown in FIG. 3A is
The address of the video memory 7 changes linearly with the change of the position of the slider 24. Therefore, the same video image as the conventional one is reproduced.

The reproduction address curve shown in FIG. 3B is
If the slider 24 is located on the left side, the video memory 7
The change rate of the address is large, and the change rate of the video memory 7 decreases as the slider 24 moves to the right.

In this example, since the reproduction speed of the video image is slow on the right side of the moving range of the slider 24, it is effective when the end of the captured video image is emphasized and reproduced.

The reproduction address curve shown in FIG. 3C is
If the slider 24 is located on the left side, the video memory 7
The change rate of the address is small, and the change rate of the video memory 7 increases as the slider 24 moves to the right. Moreover, in this example, when the slider 24 is near the center of the moving range, the change of the video memory 7 is linear, and the inclination is almost equal to the reproduction address curve shown in FIG.

That is, in this example, since the reproduction speed of the video image is slower on the left side of the moving range of the slider 24, it is effective in the case where the beginning of the captured video image is emphasized and reproduced. Another advantage is that the video image is reproduced at a standard constant speed when the slider 24 is near the center of the moving range.

The examples shown in FIGS. 3 (b) and 3 (c) are extremely useful for applications such as swing check in sports such as golf, tennis or baseball. That is, in addition to emphasizing the beginning and end of the recorded video image, the rate of change in the video memory 7 is set small when the slider 24 is near the center of the moving range, so that the club, racket, or bat is set. It will also be possible to check in detail the moment of meet with the ball.

The reproduction address curve shown in FIG. 3 (d) is
The slope of the curve is rising to the right on the left and right sides of the movement range of the slider 24, and the slope of the curve is decreasing to the right near the center of the movement range of the slider 24.

That is, in this example, when the slider 24 is moved from the left side to the right side of the moving range at a standard constant speed,
In the middle of the process, the video image temporarily reverses in time, the same image is reproduced again, and then the image is reproduced to the end, and the process ends.

By using the example shown in FIG. 3D, the moment that is the point of the video image can be easily and highly accurately reproduced repeatedly, so that an extremely attractive image effect can be obtained.

Note that the operation section in the above-described embodiment has been described with reference to an example of computer use in which various buttons, sliders, etc. are operated by operating the cursor displayed on the image display device with a mouse. . However, the present invention can be applied to a configuration in which a push button switch, a slider configured by a sliding resistor or a linear slide encoder, or the like, or a configuration including a jog shuttle or the like is provided in the operation panel.

[0042]

As described above, according to the present invention, when the reproduction frame time of the video signal recorded in the video memory is designated by the reproduction operator, the conversion table setting means reproduces the reproduction frame by the set conversion table. The time is converted into the corresponding frame address on the video memory, and the digital video data read from the frame address of the video memory in which the digitally converted video signal is recorded is converted into analog data by the digital / analog conversion means. According to the present invention, more in the conversion table, for example, for the indicated playback frame time varying at a predetermined period, the transmission of video images, can be non-uniform or reverse reproduction, when any video
It is possible to give a gradual change to the reproduction speed at every minute. According to the present invention, among the plurality of conversion tables, it is possible to select one of the conversion table corresponding to the video image being reproduced instantaneously. Furthermore, according to the present invention, the conversion text is
The playback address curve set to the table is editable
Therefore, it is possible to obtain an effect that it is possible to realize a video recorder capable of intuitive video reproduction by a user's operation such as variable speed reproduction of video images .

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a video recorder 1 according to an embodiment of the present invention.

FIG. 2 is a diagram showing a state of a control window 21 displayed on a part of an image display included in the operation unit 2 in the same embodiment.

FIG. 3 is a diagram showing an example of a reproduction address curve stored in a reproduction table memory 8 in the same embodiment.

[Explanation of symbols]

7 ... Video memory, 8 ... Reproduction table memory (conversion table setting means), 9 ... D / A converter (digital / analog conversion means), 24 ... Slider (reproduction operator).

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H04N 5/76-5/956

Claims (5)

(57) [Claims] 1. A video memory for recording digital converted video signal, a digital / analog conversion means to analog conversion on the digital video data read out from said video memory
When the reproduction frame time of the recorded video signal to the video memory, and the playback operator for instructing the operation position, the playback frame time indicated by the reproduction operator in the corresponding frame address on the video memory conversion table and conversion table setting hand stage, the reproduction address curve set in the conversion table for setting a conversion table
; And a Shimesuru display means, said reproduction address curve is displayed by the display means
A video recorder characterized by being editable . Wherein said conversion table setting means, a plurality of setting each plurality of different conversion tables serial
It has 憶 area, setting a plurality of said conversion table stored in the storage area
Video recorder according to claim 1, characterized by chromatic selection means to select one of the constant has been the reproduction address curve. 3. Recording a digitally converted video signal
Video memory and the digital video data read from the video memory.
Digital / analog conversion means for converting data into analog
And the playback frame of the video signal recorded in the video memory.
The playback operation time that is specified by the operating position and the playback frame time that is specified by the playback operation element.
Convert to the corresponding frame address on the video memory
Set a conversion table to
It has a plurality of storage areas for setting a table,
Before being set in the plurality of conversion tables stored in the area
Have a selection means you select one of the serial reproduction address curve
And a reproduction address curve set in the conversion table.
Features and to ruby Deorekoda by comprising a Shimesuru display means. 4. The reproduction address curve is editable.
The video recorder according to claim 3, wherein the video recorder is a video recorder. 5. The reproduction address curve is edited.
An input unit for further comprising:
1 or claim 2 or claim 4
Deorecoder.