KR100813063B1 - Imaging device having high speed forwarding and rewinding display function and method thereof - Google Patents

Abstract

The present invention relates to an imaging apparatus having a high speed forwarding and rewinding display function and a method thereof. According to an aspect of the present invention, there is provided an image device that configures a specific GOP to display a fast forwarding (FF) and rewinding (FW) screen, comprising: a counter configured to count an error value according to the number of pictures remaining after configuring the specific GOP; An error calculator that accumulates an error value according to the GOP configuration counted by the counter and reflects it to the number of pictures to be displayed when the value is greater than or equal to a predetermined value; Determine the speed according to the user's input command, and accordingly configures a GOP for displaying the FF and FW screen by selecting specific pictures, and by adding or subtracting the pictures configured in the GOP according to the number of pictures reflected from the error calculator It characterized in that it comprises a central control unit. Accordingly, the number of pictures selected according to the number of GOPs at the time of FF and FW is adaptively applied to prevent the picture from being skipped more than necessary and the change of the screen is made more naturally.

Fast Forwarding, Rewinding, Display, Video, GOP, Picture, Error Value

Description

Image display apparatus having function of the displaying fast forward and fast rewind and Method

1 is a block diagram showing a conventional imaging device.

2 is a control flowchart illustrating a fast forwarding and rewinding display method of a conventional imaging apparatus.

3 is a block diagram illustrating an imaging apparatus having a high speed forwarding and rewinding display function according to the present invention;

4 is a control flowchart illustrating a fast forwarding and rewinding display method of an imaging apparatus according to the present invention;

5 is a diagram for explaining an operation of extracting a specific picture from a GOP.

<Description of the symbols for the main parts of the drawings>

100: remote control transmitter 101: receiver

102: counter 103: error calculator

104: central control unit 105: digital TV tuner

106: demodulator 107: system decoder

108: interface unit 109: video and audio decoder

110: image processing unit 111: analog TV tuner

112: analog signal decoder 113: MPEG-2 encoder

114: stream encoder 115: stream storage unit

116: display unit

The present invention relates to an imaging apparatus and a method thereof, and more particularly, to an imaging apparatus and a method having a high-speed forwarding and rewinding display function.

In general, a video apparatus or a video apparatus is a generic term for devices such as TVs, VTRs, and PVRs that display various information as images using a screen.

Recently, a personal video recorder (PVR) having a function of receiving an image and adding a function to record an image to a storage medium such as a hard disk (HDD) is widely used.

As an example, the PVR provides much more advanced functions than the conventional VCR through basic recording functions as well as time-shift, instant replay and other various play functions.

In addition, such a PVR can record and view high-definition digital broadcasting at any time, as well as to store a user's captured image on the storage medium, and then selectively call out a necessary part through a high-speed search for convenient display. Various additional service functions such as can be provided.

Such a conventional imaging apparatus displays a picture in a GOP (Group Of Picture) according to a double speed when implementing fast forwarding (hereinafter abbreviated as FF) and fast rewinding (hereinafter abbreviated as FW) functions during fast search. Decided whether or not showed on the screen.

FIG. 1 is a block diagram illustrating a conventional imaging apparatus, and FIG. 2 is a control flowchart illustrating a fast forwarding and rewinding display method of a conventional imaging apparatus.

As shown in the drawing, a conventional video apparatus includes: a remote control transmitter 10 for inputting a user control command such as channel selection and wirelessly transmitting this signal; A receiving unit 11 for receiving a control command transmitted from the remote controller transmitting unit 10 and transmitting the received control command to the central control unit 12; A central control unit 12 for controlling an operation state of each unit of the apparatus according to a control command received from the receiving unit 11; A digital TV tuner 13 and physically select a specific channel under the control of the central controller 12 and receive the digital broadcast signal in the form of a transport stream from the selected channel, the transformer received by the DTV tuner 13 A demodulator 14 for demodulating the port stream; An analog TV tuner (19) for physically selecting a specific channel under the control of the central controller (12) and receiving an analog broadcast signal from the selected channel; An analog signal decoder 20 for decoding the analog broadcast signal received by the analog TV tuner 19; An MPEG-2 encoder (21) for encoding the broadcast signal decoded by the analog signal decoder (20) into an MPEG-2 digital signal; A system decoder (15) for receiving video signals from the demodulator (14) and the MPEG-2 encoder (21) and decoding the respective signals to output video and audio signals; An interface unit 16 connecting the system decoder 15 and the stream encoder 22; A stream encoder (22) for encoding the decoded video and audio signals at the system decoder (15); A stream storage unit 23 for storing the stream data encoded by the stream encoder 22; A video and audio decoder (17) for decoding the encoded stream data provided from the stream storage unit (23) to the video and audio through the interface unit (16); The image processor 18; And a display unit 24 for displaying the video signal on the screen.

As illustrated in FIG. 2, the conventional imaging apparatus configured as described above determines whether to display a picture in a GOP according to a double speed and displays it on a screen when implementing the FF and FW functions.

That is, when the user inputs the FF or FW function through the remote control transmitter 10 (S101), the central control unit 12 determines the speed according to the input command, and configures the corresponding GOP according to the input command (S102 to S103). ).

Thereafter, the number of pictures to be displayed in one GOP is determined, and Equation 1 below is applied (S104).

D = MAX [M / n]

Where D is the number of pictures to be displayed, M is the number of pictures in the GOP, and MAX [x] is the maximum integer not exceeding x.

Therefore, as many pictures as the number of pictures determined according to Equation 1 are displayed on the FF and FW screens (S105).

Since the conventional imaging apparatus configured as described above selects pictures according to double speed only in one GOP, the number of pictures selected for each GOP may be different if the double speed and the number of pictures in the GOP are not integer multiples. This makes a slight difference between the actual speed and the number of pictures displayed, which increases the unnaturalness of the screen.

For example, in the case of realizing 4x speed in GOP composed of 13 pictures each time, only 3 pictures are extracted and displayed for each GOP. Then, when implementing double speed based on GOP, 13 = 4 (double speed) * 3 + 1, so one picture is discarded in every GOP. Therefore, conventionally, the actual speed is 4.25 times faster than 4 times.

As described above, the conventional imaging apparatus has a problem that the picture is skipped more than necessary because the speed is different from the actual speed, and the screen is not naturally changed.

Accordingly, the present invention is to solve the above-mentioned conventional problems, and to adaptively apply the number of pictures selected according to the number of GOPs in FF and FW to prevent skipping the picture more than necessary, It is an object of the present invention to provide a video device and a method having a high-speed forwarding and rewinding display function to make the change more naturally.

An imaging apparatus having a fast forwarding and rewinding display function according to the present invention for achieving the above object is provided in an imaging apparatus configuring a specific GOP to display a fast forwarding (FF) and a rewinding (FW) screen. A counter configured to configure the specific GOP and count an error value according to the number of pictures remaining; An error calculator that accumulates an error value according to the GOP configuration counted by the counter and reflects it to the number of pictures to be displayed when the value is greater than or equal to a predetermined value; Determine the speed according to the user's input command, and accordingly configures a GOP for displaying the FF and FW screen by selecting specific pictures, and by adding or subtracting the pictures configured in the GOP according to the number of pictures reflected from the error calculator It characterized in that it comprises a central control unit.

The central controller adds one picture to the configured GOP when the error value is 0 or more and less than 1 and the error cumulative value is 1 or more. The central controller controls the number of pictures reflected in the GOP to increase as the speed increases. The central controller displays the number of pictures D to be displayed in the specific GOP as "D = MAX [M / n]", and the error value E as "E = M / n-D" (where D is a display). The number of pictures to be performed, M is the number of pictures in a GOP, n is a double speed, MAX [x] is a maximum integer not exceeding x, and E is an error value.

In addition, the high-speed forwarding and rewinding display method of the imaging apparatus according to the present invention, in the image display method for configuring a specific GOP to display the high-speed forwarding (FF) and rewinding (FW) screen, comprising the specific GOP Counting an error value according to the remaining number of pictures; An error calculation step of accumulating an error value according to the GOP configuration counted in the counter step, and reflecting it on the number of pictures to be displayed when the value is equal to or greater than a predetermined value; Determine the speed according to the user's input command, and accordingly configure the GOP for displaying the FF and FW screen by selecting specific pictures, and display by adding or subtracting the pictures configured in the GOP according to the number of pictures reflected from the error calculation step Characterized in that it comprises a step.

If the error value is 0 or more and less than 1, and the error accumulation value becomes 1 or more, one picture is added to the configured GOP. As the speed increases, the number of pictures reflected in the GOP is controlled to increase. The number D of pictures to be displayed in the specific GOP is "D = MAX [M / n]", and the error value E is "E = M / n-D" (where D is the number of pictures to display, M Is the number of pictures in the GOP, n is a double speed, MAX [x] is a maximum integer not exceeding x, and E is an error value.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a block diagram illustrating an imaging apparatus having a high speed forwarding and rewinding display function according to the present invention.

As shown in the present invention, the remote control transmitter 100, the receiver 101, the counter 102, the error calculator 103, the central controller 104, the digital TV tuner 105, the demodulator 106, the system Decoder 107, interface unit 108, video and audio decoder 109, image processing unit 110, analog TV tuner 111, analog signal decoder 112, MPEG-2 encoder 113, stream encoder ( 114, a stream storage unit 115, and a display unit 116.

The remote control transmitter 100 inputs a user control command such as channel selection, transmits this signal wirelessly, and the receiver 101 receives a control command transmitted from the remote controller transmitter 100 to receive the control command. To pass.

The counter 102 counts an error value according to the number of pictures remaining after configuring the specific GOP, and the error calculator 103 accumulates an error value according to the GOP configuration counted by the counter 102, and this value is If more than a predetermined value, it is reflected in the number of pictures to be displayed.

The central control unit 104 determines the speed according to a user's input command, and thus configures a GOP for displaying FF and FW screens by selecting specific pictures, and according to the number of pictures reflected from the error calculator 103. The picture configured in the GOP is added or subtracted.

The central control unit 104 adds one picture to the configured GOP when the error value is 0 or more and less than 1 and the error accumulation value is 1 or more. In addition, the central control unit 104 controls so that the number of pictures reflected in the GOP increases as the speed increases. Accordingly, the central controller 104 determines that the number of pictures D to be displayed in the specific GOP is "D = MAX [M / n]", and the error value E is "E = M / n-D". (D is the number of pictures to be displayed, M is the number of pictures in a GOP, n is a double speed, MAX [x] is a maximum integer not exceeding x, and E is an error value).

4 is a control flowchart illustrating a fast forwarding and rewinding display method of an imaging apparatus according to the present invention.

As shown in the present invention, in the image display method for configuring a specific GOP to display a high-speed forwarding (FF) and rewinding (FW) screen (S201 to S203), to the number of pictures remaining after configuring the specific GOP A counter step of counting the error value according to step S206; An error calculation step (S207 to S208) of accumulating an error value according to the GOP configuration counted in the counter step, and reflecting it on the number of pictures to be displayed when the value is equal to or greater than a predetermined value; Determine the speed according to the user's input command, and accordingly configure the GOP for displaying the FF and FW screen by selecting specific pictures, and display by adding or subtracting the pictures configured in the GOP according to the number of pictures reflected from the error calculation step It characterized in that it comprises a step (S204 ~ S205, S209).

If the error value is 0 or more and less than 1, and the error accumulation value becomes 1 or more, one picture is added to the configured GOP. As the speed increases, the number of pictures reflected in the GOP is controlled to increase. The number D of pictures to be displayed in the specific GOP is "D = MAX [M / n]", and the error value E is "E = M / n-D" (where D is the number of pictures to display, M Is the number of pictures in the GOP, MAX [x] is a maximum integer not exceeding x, and E is an error value.

FIG. 5 is a diagram for explaining an operation of extracting an I picture from a GOP. As shown in FIG. 5, an I picture is extracted from the GOP (Group Of Picture) or a color difference width of a plurality of images is larger than a predetermined reference value It is preferable to extract.

Referring to the operation of the present invention configured as described in more detail as follows.

First, a step of configuring a specific GOP in order to display the high-speed forwarding (FF) and rewinding (FW) screen is performed (S201 to S203).

That is, the remote control transmitter 100 inputs a user control command such as channel selection, transmits this signal wirelessly, and the receiver 101 receives a control command transmitted from the remote controller transmitter 100 to receive a central control device ( 104). Accordingly, the central control unit 104 determines the speed according to a user's input command, and thus selects specific pictures to configure a GOP for displaying FF and FW screens.

In this case, the central controller 104 controls the number of pictures to be reflected in the GOP as the double speed increases, so that the central controller 104 displays the number of pictures D to be displayed in the specific GOP. "D = MAX [M / n]", the error value (E) is "E = M / n-D" (D is the number of pictures to display, M is the number of pictures in the GOP, n is the double speed, MAX [ x] is determined to satisfy the maximum integer not exceeding x, and E is an error value (S204 to S205).

Subsequently, a counter is configured to count an error value according to the number of pictures remaining after configuring the specific GOP (S206), and the error value according to the GOP configuration counted in the counter step is accumulated, and when the value is equal to or greater than a predetermined value. An error calculation step is reflected to reflect the number of pictures to be displayed (S207 to S208).

At this time, the counter 102 counts an error value according to the number of pictures remaining after configuring the specific GOP, and the error calculator 103 accumulates the error values according to the GOP configuration counted by the counter 102. Therefore, when the error value is 0 or more and less than 1 and the error accumulation value becomes 1 or more, one picture is added to the configured GOP.

For example, as shown in Table 1 below, when a GOP executes an FF of 4x speed in a stream composed as follows, an error value (Err) value for each GOP is accumulated and accumulated. Get the error value, and if it exceeds 1, add 1 picture to display.

Number of pictures in the GOP Contents Error value Cumulative Error Value Chapter thirteen 13 = 4 (double speed) * 3 (number of pictures to display) + 1 (number of pictures remaining) 1/13 = 0.08 0.08 Chapter 14 14 = 4 * 3 + 2 2/14 = 0.14 0.22 Chapter fifteen 15 = 4 * 3 + 3 3/15 = 0.2 0.42 Chapter thirteen 13 = 4 * 3 + 1 1/13 = 0.08 0.50 Chapter fifteen 15 = 4 * 3 + 3 3/15 = 0.2 0.70 Chapter fifteen 15 = 4 * 3 + 3 3/15 = 0.2 0.90 Chapter fifteen 15 = 4 * 3 + 3 3/15 = 0.2 1.10 Chapter fifteen 15 = 4 * 3 + 3 3/15 = 0.2 0.30 Chapter fifteen 15 = 4 * 3 + 3 3/15 = 0.2 0.50

Therefore, the central controller 104 performs the step of displaying the pictures configured in the GOP in accordance with the number of pictures reflected from the error calculating step (S209).

In this case, as illustrated in FIG. 5, a specific picture list may be configured by extracting an I picture from a normal group of pictures (GOP). That is, in general, video signals are compressed using the overlapping characteristics of signals. As a representative example, when video signals are compressed to MPEG-2, they are classified into I, P, and B pictures, and different algorithms are applied.

The I picture is mainly created when a scene change occurs and there is no correlation with an adjacent picture. When similar pictures are contiguous, they are compressed into P pictures by referring to previous I or P pictures. Since B pictures are compressed with reference to previous and subsequent pictures, they are most efficient. In the compression / restore process, less error occurs and I, P, and B are distinguished to improve the compression efficiency.

Accordingly, the digitally compressed image is composed of several GOPs as shown in FIG. 5, and the GOPs are grouped still images divided into I, P, and B pictures. Usually, when a scene change occurs and it is not correlated with an adjacent picture, an I picture has all the information on one screen.

As described above, the present invention adaptively applies the number of pictures selected according to the number of GOPs at the time of FF and FW to prevent the picture from being skipped more than necessary and makes the screen change more naturally.

The present invention described above can be applied not only to conventional video display devices, that is, flat panel display devices such as PDPs and LCDs, but also to PVRs, VTRs, projection TVs, general TVs, CRT monitors, and other video devices. The same applies to, and satellite TV. In addition, it can of course be applied to all NTSC, PAL, SECAM method.

Although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the above-described embodiments, and the present invention is not limited to the above-described embodiments without departing from the spirit of the present invention as claimed in the claims. Anyone skilled in the art can, of course, make various changes and make such changes as fall within the stated claims.

As described above, according to the imaging apparatus and method having a high-speed forwarding and rewinding display function according to the present invention, a picture is required by adaptively applying the number of pictures selected according to the number of GOPs in FF and FW. There is an effect to prevent the above skip, and to change the screen more naturally.

Claims (8)

In the video device for configuring a specific GOP to display a high-speed forwarding (FF) and rewinding (FW) screen, A counter configured to configure the specific GOP and count an error value according to the number of pictures remaining; An error calculator that accumulates an error value according to the GOP configuration counted by the counter and reflects it to the number of pictures to be displayed when the value is greater than or equal to a predetermined value; Determine a speed according to a user's input command, and accordingly select specific pictures to configure a GOP for displaying the FF and FW screen, and subtracts the pictures configured in the GOP according to the number of pictures reflected from the error calculator, And a central controller for increasing and displaying the number of pictures reflected in the GOP as the double speed is increased. The method of claim 1, The central control unit And at least one picture is added to the configured GOP when the error cumulative value is one or more. delete The method of claim 1, The central control unit The number D of pictures to be displayed in the specific GOP is "D = MAX [M / n]", and the error value E is "E = M / n-D" (where D is the number of pictures to display, M Is a number of pictures in a GOP, n is a double speed, MAX [x] is a maximum integer not exceeding x, and E is an error value). In the image display method of configuring a specific GOP to display a high-speed forwarding (FF) and rewinding (FW) screen, A counter step of counting an error value according to the number of pictures remaining after configuring the specific GOP; An error calculation step of accumulating an error value according to the GOP configuration counted in the counter step, and reflecting it on the number of pictures to be displayed when the value is equal to or larger than a predetermined value; Determine the speed according to the user's input command, and accordingly select a particular picture to configure a GOP for displaying the FF and FW screen, and subtracts the picture configured in the GOP according to the number of pictures reflected from the error calculation step, And increasing and displaying the number of pictures reflected in the GOP as the double speed is increased. The method of claim 5, And at least one picture is added to the configured GOP when the error value is greater than 0 and less than 1, and the accumulated error value is greater than or equal to 1. The fast forwarding and rewinding display method of an image apparatus. delete The method of claim 5, The number D of pictures to be displayed in the specific GOP is "D = MAX [M / n]", and the error value E is "E = M / n-D" (where D is the number of pictures to display, M Is a number of pictures in a GOP, n is a double speed, MAX [x] is a maximum integer not exceeding x, and E is an error value).

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