TW201339947A - A car camera capable of capturing enlarged picture by touch screen and a method thereof - Google Patents

Abstract

A car camera capable of capturing enlarged picture by touching a touch screen and a method thereof is disclosed. The car camera comprises a touch screen, a video processing chip and a static picture processing chip. During the video recording operation, if a user touches any point at the image displayed on the touch screen, then the car camera will immediately capture an enlarged static picture of that image and also record the time of that captured picture, without the needs to switch the functions between video-recording and photo-taking, nor to perform zooming operation manually, nor to pause the video recording operation. Therefore, the car camera has the advantages of: 1. capturing an enlarged static picture of some important image, and 2. recording the time and image of important or emergent incident instantly.

Description

Click to enlarge the image capturing method and device

The invention relates to a driving method and device for clicking and zooming in, especially a touch screen, which can be photographed by touching a certain point on the touch screen during recording. A magnified photo and a driving recorder for magnifying the still image and its method.

In order to ensure the safety of driving or to provide audio and video records in the event of an accident, as evidence of the attribution of the accident, more and more users are installing vehicle video equipment such as driving recorders on their vehicles. Since such driving recorders often require long-term continuous recording for several hours or more, and at the same time, it is necessary to avoid the visibility of the driver of the vehicle after installation, the general driving recorder is usually small in size. At most, it only has a display screen of about 2 inches, and most of them only have a video function, or a simple function of taking a still image as a digital camera without performing a video recording operation.

However, in the event of a traffic accident, objects that need to be videotaped or photographed are not close enough, and if the distance is too far, it is likely that a clear image may not be captured, or although the image is taken, the most important Key information (such as the license plate number of the vehicle) is too small to be recognized. In addition, the accident usually occurs suddenly, and the user almost does not have enough time to pause the recording function of the driving recorder and switch to the mode of shooting the still image, and then take a still image, and let alone An optical or digital zoom operation that zooms in and out of a still image is performed immediately. What's more, once you switch to the function of shooting still images, the current driving recorder needs to pause the continuous recording function, and it is impossible to take still images during continuous recording or static after shooting. The function of the image, its proof function is obviously insufficient, and needs further improvement.

The main purpose of the present invention is to provide a driving video recording device capable of clicking and zooming in, which can be photographed during the recording of the driving video recording device by touching a certain point on the touch screen of the driving video recording device. Zoom in on the point and take a magnified still image to overcome the problem that the technology must first switch between recording and taking pictures before taking still pictures, not taking pictures immediately, and when taking pictures. The lack of video recording must be stopped.

In order to achieve the above object, a preferred embodiment of the present invention is characterized in that: a touch screen can be used to display an image, and when the touch screen is touched at a certain position, When touched, a touch signal corresponding to a coordinate value of the touched portion is generated; a lens module can be used to capture a dynamic image of the outside; a memory unit; and a control unit coupled to the touch Controlling the screen and the lens module, the moving image captured by the lens module is displayed on the touch screen, and the moving image is stored in the memory unit as an electronic file under a preset condition And the control unit can receive the touch signal from the touch screen, and according to the touch signal and the coordinate value, capture an image in the motion image when the touch screen is touched. Frame data; afterwards, the control unit performs a predetermined multiple of the digital image on the image frame data according to the coordinate value, and thus obtains an enlarged still image, and the enlarged image is enlarged The still image In the form of electronic files stored in the memory unit.

In a preferred embodiment, the control unit further includes an image compression video chip and a still image capturing chip, and the still image capturing chip has a digital image processing function of the still image; and the control unit is And continuously displaying the moving image captured by the lens module on the touch screen, and storing the dynamic image in the memory unit in the electronic file under the preset condition, simultaneously performing The image frame data is retrieved according to the touch signal and the coordinate value, and the captured image frame data is digitally enlarged according to the coordinate value and the static image is enlarged. The operation of storing images in the memory unit as an electronic file.

In a preferred embodiment, the driving video device has a loop recording function.

In a preferred embodiment, the memory unit includes a built-in memory component and an external memory component, and the dynamic image and the static image are stored in the electronic file in the external memory component; wherein the external device The memory component includes a card reader for accepting and accessing data in one of the external memory cards; the built-in memory component includes at least one of the following: a dynamic random access memory, a hard disk, and a flash memory. .

In a preferred embodiment, the driving video recording device further includes: a microphone, which can be used to capture one of the external sounds and is coupled to the control unit, and the control unit combines the sound with the dynamic image. And storing in the memory unit as an electronic file; a power source for providing power required by the driving video device; and an input/output interface coupled to the control unit and further comprising an operation interface and a signal output module The operation interface includes a plurality of control keys for a user to operate and control the driving video device; the signal output module includes at least one of the following: a digital data transmission port, an audio output terminal, and An image output terminal is respectively connected to one of the external electronic devices and transmits digital audio and video data, digital audio signals, and video playback signals; wherein the digital data transmission is in accordance with one of the following specifications: USB, mini-USB And IEEE 1394.

For the above purposes, the driving video recording method of the present invention can include the following steps: Step (A): activation of the driving video device; enabling the control unit to capture the outside world by the lens module One of the motion pictures is displayed on the touch screen; step (B): during the continuous execution of capturing and displaying the motion picture, check whether the touch screen is touched? If no, perform step (E); if yes, perform step (C); step (C): obtain a coordinate value of the touch screen touched by the touch screen, and capture the touch screen on the touch screen Touching an image frame data in the dynamic image at that time; after that, the image frame data captured is subjected to a predetermined multiple of the digital magnification processing according to the coordinate value, and thus an amplified static is obtained Image; step (D): storing the enlarged still image as an electronic file in the memory unit, and then performing step (A); step (E): performing one can be performed under a preset condition An operation in which a motion picture is stored in an electronic file in the memory unit.

In a preferred embodiment, the operating system for storing the motion image in the memory unit in the electronic file under the preset condition in the step (E) includes the following steps: Step (E1) : Check whether the duration of the operation of capturing the motion image described in the step (A) has reached a preset period? If "No", go back to step (A); if "Yes", go to step (E2); Step (E2): Check if the remaining memory space of the memory unit is insufficient? If no, perform step (E4); if yes, perform step (E3); step (E3): delete the earliest image file stored in the memory unit; and step (E4): The motion picture is stored in the memory unit as an electronic file, and then returns to step (A) and re-times the operation of capturing the motion picture.

In a preferred embodiment, the step (D) includes the following steps: Step (D1): Check whether the remaining memory space of the memory unit is insufficient. If no, perform step (D3); if yes, perform step (D2); step (D2): delete the earliest image file stored in the memory unit; and step (D3): The enlarged still image is stored in the memory unit as an electronic file.

In a preferred embodiment, even in the process of performing step (C) to step (D), the moving image is stored in the memory unit as an electronic file under the preset condition as described in step (E). This operation in the process continues to be ongoing.

In order to enable your review committee to have a better understanding and understanding of the features, purposes and functions of the present invention, the detailed description of the drawings is as follows:

Please refer to FIG. 1 , FIG. 2A and FIG. 2B , which are respectively a schematic diagram of an operation of a preferred embodiment of the driving video recording device capable of clicking and zooming in, and the captured moving image screen and the enlarged image. A schematic representation of a still image. The driving video recording device 2 (commonly known as the driving recorder) of the present invention can be specifically configured with a touch screen 23 (such as but not limited to a touch LCD screen), and is controlled inside the body 21 thereof. An image compression video chip 251 and a still image capturing wafer 252 are disposed in the unit 25. When the driving video recording device 2 of the present invention captures the moving image of the foreign object 10 by the lens module 22, that is, during the video recording function, if the user touches the touch screen 23 with the finger 15 or other items. When a certain point 231 of the display screen (hereinafter referred to as the touch contact 231) is displayed, the driving video recording device 2 of the present invention takes an enlarged photograph of the touch contact 231 and captures an enlarged still image while recording Shooting time. For example, as shown in FIG. 1, when the captured motion picture (that is, the dynamic picture displayed on the touch screen 23 as shown in FIG. 2A) contains the license plate 11 of the foreign object 10 (for example, the preceding vehicle), the user only When the position of the license plate 11 displayed on the touch screen 23 is touched (that is, the touch contact 231 shown in FIG. 2A is touched), a clear still image of the license plate 11 can be captured (also For example, as shown in FIG. 2B, the static image after a predetermined multiple of the touch contact 231 is centered, and there is no need to switch between the video and camera functions, and the manual zoom operation without zooming in and out is performed. There is no need to suspend the recording function that is currently in progress. Therefore, the driving video device 2 of the present invention can not only overcome various shortcomings of the prior art, but also can have: 1. a static image after the focus picture is enlarged, and an extremely important picture at the time when the special event occurs. The effect.

Please refer to FIG. 3, which is a circuit block diagram of a preferred embodiment of a driving video recording device capable of clicking and zooming in. In this embodiment, the driving video recording device 2 that can be clicked and enlarged includes: a body 21 for accommodating and positioning other components, a lens module 22, a touch screen 23, a sensing unit 24, A control unit 25, an input/output interface 26, a memory unit 27, a power source 28, and a microphone 29.

The lens module 22 is for capturing a still image or a moving image of the foreign object 10 and converting it into a digital image signal. In this embodiment, the lens module 2 can include a lens group (Lens Set) and an image sensing module (Image Sensor); wherein the lens group can be fixed focus or Preferably, the zoom lens group and the image sensing module may include a CCD or CMOS image sensing chip.

The touch screen 23 can be used to display an image, and the sensing unit 24 is coupled to the touch screen 23 and coupled to the control unit 25 for detecting whether a foreign object touches the touch. The position of the control screen 23 and the touch point 231 is controlled. When the touch screen 23 is touched at a certain point, the sensing unit 24 will generate a touch signal corresponding to a coordinate value of the touched portion 231. In the embodiment, the sensing unit 24 may be built in the touch screen 23, but in other embodiments, the sensing unit 24 may also be a separate component that is additionally coupled to the surface of the touch screen 23.

The control unit 25 is coupled to the touch screen 23, the sensing unit 24 and the lens module 22, and the dynamic image captured by the lens module 22 is displayed on the touch screen 23, and The motion picture is stored in the memory unit 27 as an electronic file under preset conditions. In this embodiment, the control unit 25 further includes an image compression video chip 251, a still image capturing chip 252, and a timing unit 253. The timing unit 253 can provide the system time of the driving record device 2 and the recording period. The timing function, and the still image capturing wafer 252 has a digital image processing function of a still image. When the driving video recording function is executed, the dynamic digital video signal from the lens module 22 is mainly processed by the image compression video chip 251, and is compressed into a dynamic image electronic file format that can be interpreted by the computer, for example, but not limited thereto. It is commonly used in the format of mpeg, avi, flv, etc., and is stored in the memory unit 27 after the recording time of the timing unit timing 253 every predetermined period of time. At the same time, the control unit 25 can also receive the touch signal from the touch screen 23 and the sensing unit 24, and capture the touch screen 23 according to the touch signal and the coordinate value of the touch point 231. The image frame data in the dynamic image at the time is touched, and the system time of the timing unit 253 is recorded at the same time. Then, the control unit 25 performs a predetermined multiple of the digital image processing on the image frame 252 by the static image capturing chip 252 according to the coordinate value, and thus obtains an enlarged static image. For example, and the enlarged still image is stored in the memory unit 27 in a static image electronic file format (for example, but not limited to, currently common: jpg, etc.) that can be interpreted by the computer.

In the embodiment, the control unit 25 displays the moving image captured by the lens module 22 on the touch screen 23, and the electronic image is electronically under the preset condition. The file format is stored in the memory unit 27, and the image frame data is retrieved according to the touch signal and the coordinate value, and the captured image frame data is based on the coordinate The value is the center for digital enlargement processing and the enlarged still image is stored in the memory unit 27 in the form of an electronic file. Therefore, the driving video recording device 2 of the present invention does not need to perform the switching of the video recording and photographing functions, and does not need to perform the zooming and zooming manual zooming operation, and does not need to suspend the original recording function in progress, and can indeed solve various kinds of conventional technologies. Missing.

The input and output interface 26 is coupled to the control unit 25, and further includes an operation interface 261 and a signal input and output module 262. The operation interface 261 is coupled to the control unit 25 and includes a plurality of control keys or a rotary control button for the user to operate and control the driving video recording device 2 of the present invention which can click to enlarge the image. The signal input/output module 262 is coupled to the control unit 25 and includes at least one of the following: a digital data transmission port, an audio output terminal, and an image output terminal, respectively, which are respectively available to an external electronic device (in the figure) Not shown) Connect and transmit digital audio and video data, digital audio signals, and video playback signals. In an embodiment of the present invention, the digital data transmission port is a socket that meets one of the following interface specifications: USB, mini-USB, and IEEE 1394; and an external device that can be connected to the same communication interface, for example, but not limited thereto For computers, external hard drives, external card readers, smart phones, and more. The control unit 25 can write or read the digital audio and video data through the digital data transmission port 262 to the connected external device.

The memory unit 27 is connected to the control unit 25, and can be stored in the memory unit 27 or from the memory unit 27 under the control of the control unit 25 to store the digital video, dynamic video, or still image data. Read or display pre-stored digital motion pictures, motion pictures, or still image data. In the embodiment, the memory unit 27 includes a built-in memory component 271 and an external memory component 272. The built-in memory component 271 can include at least one of the following: dynamic random access memory (DRAM), static random access memory (SRAM), read only memory (ROM), hard disk, and fast Flash Memory. The external memory component 272 can include a memory card interface, such as a card reader, for accepting and accessing data in one of the external memory cards 273. In this embodiment, the dynamic image and the still image are preferably stored in the electronic file format on the memory card 273 connected to the external memory component 272.

The power source 28 is used to provide the power required for each component included in the driving video recording device 2 of the present invention, which includes at least one of the following: a battery, and a power supply connectable to an external power source. Device.

The microphone 29 is coupled to the control unit 25 and can be used to capture one of the outside sounds and convert it into a digital audio signal. The control unit 25 can further include an audio codec (not shown), which can convert the sound captured by the microphone 29 into a digital audio signal and the motion image captured by the lens module 22 The single dynamic image electronic file is synthesized and stored in the memory unit 27 or played.

In one embodiment, the driving video recording device 2 of the present invention has a loop recording function. The operation of storing the motion image in the memory unit 27 in the electronic file under the preset condition means that the captured motion image is recorded for each preset period (for example, every 2 minutes). After 3 minutes, 5 minutes or longer, the motion picture captured during the preset period (which can also be integrated with the digital audio signal of the period) is processed into a dynamic image electronic file and stored in the memory. In the unit 27; and when the storage capacity of the memory unit 27 is insufficient to accommodate the dynamic image electronic file, the control unit 25 will record the earliest of the plurality of dynamic image electronic files previously stored in the memory unit 27 (the earliest recording time) After the one or several motion picture electronic files are deleted to increase the capacity, the currently recorded motion picture electronic file is stored in the memory unit 27. Thus, the inventive driving video device 2 can continue to record for a long time without worrying about the problem of insufficient capacity of the memory unit 27. In addition, the driving video recording device 2 of the present invention has another unique design, that is, the enlarged static image electronic file captured by touching the touch screen 23, if found in the process of being stored in the memory unit 27. When the capacity is insufficient, the control unit 25 of the driving video recording device 2 of the present invention also deletes the dynamic image electronic file of the earliest (the earliest recording time) among the plurality of moving image electronic files originally stored in the memory unit 27, Instead of deleting the static image of the earliest shot. In this way, there is no need to worry that the important still image electronic files that are captured may be deleted because they continue to use the video recording function of the driving video device 2 or after taking multiple photos.

Please refer to FIG. 4 , which is a flowchart of a preferred embodiment of a driving video recording method capable of clicking and zooming in. The driving video recording method of the present invention can be applied to a driving video recording device 2 having a lens module 22, a touch screen 23, a control unit 25, and a memory unit 27 as described above, and the method includes The following steps:

Step 400: Start. The driving video device is activated; the control unit can capture a moving image of the outside world by using the lens module, and display the dynamic image on the touch screen.

Step 401: During the continuous execution of capturing and displaying the video of the motion picture, check whether the touch screen is touched (step 402). If no, step 403 is executed to perform an operation of storing the motion picture in the memory unit in an electronic file under a preset condition; if YES, step 408 is performed.

Step 403: Check whether the duration of the video recording operation for capturing the motion picture described in the step 401 has reached a preset period (for example, but not limited to: n minutes, where n is a positive integer)? If "No", go back to step 401; if "Yes", go to step 404.

Step 404: Try to save the motion image in the memory unit in the form of an electronic file, and then perform step 405.

Step 405: Check whether the remaining memory space of the memory unit is insufficient to store the motion image. If no, step 407 is performed; if YES, step 406 is performed.

Step 406: Delete the first one or several image files that have been stored in the memory unit, and then perform step 407.

Step 407: The moving image is stored in the memory unit as an electronic file, and then returns to step 401 and the recording operation for capturing the dynamic image is re-timed during the continuous recording period.

Step 408: Obtain a coordinate value of the touch screen being touched, and capture an image frame data included in the dynamic video recording stream when the touch screen is touched, and record the driving video at the same time. One of the devices is system time. Then, as shown in step 409, the captured image frame data is subjected to a predetermined multiple of the digital magnification processing according to the coordinate value, and thus an enlarged still image is obtained.

Step 410: After combining the enlarged still image with the system time, try to store the file in an electronic file format in the memory unit, and then perform step 411.

Step 411: Check if the remaining memory space of the memory unit is insufficient to store the still image. If no, step 413 is performed; if YES, step 412 is performed.

Step 412: Delete the first image file that has been stored in the memory unit, and then perform step 413.

Step 413: The enlarged still image is stored in the memory unit as an electronic file, and then step 401 is performed.

In this embodiment, even in the process of performing the static image enlargement and storage of steps 408 to 413, the moving image is stored in the memory as an electronic file under the preset condition as described in steps 403 to 407. This operation in the unit continues until the operation.

The above-mentioned embodiments are not intended to limit the scope of application of the present invention, and the scope of the present invention should be based on the technical spirit defined by the content of the patent application scope of the present invention and the scope thereof. It is to be understood that the scope of the present invention is not limited by the spirit and scope of the present invention, and should be considered as a further embodiment of the present invention.

10. . . Foreign matter

11. . . License plate

15. . . finger

2. . . You can click on the zoom video camera

twenty one. . . Body

twenty two. . . Lens module

twenty three. . . Touch screen

231. . . Touch contact

twenty four. . . Sensing unit

25. . . control unit

251. . . Image compression video chip

252. . . Still image capture chip

253. . . Timing unit

26. . . Output interface

261. . . Operation interface

262. . . Signal output module

27. . . Memory unit

271. . . Built-in memory component

272. . . External memory component

273. . . Memory card

28. . . power supply

29. . . microphone

400~413. . . Steps

FIG. 1 is a schematic diagram of the operation of a preferred embodiment of a driving video recording device capable of clicking and zooming in.

FIG. 2A is a schematic diagram of an embodiment of a moving image captured by a driving video recording device capable of clicking and zooming in.

FIG. 2B is a schematic diagram of an embodiment of an enlarged static image captured by a driving video recording device capable of clicking and zooming in on the present invention.

FIG. 3 is a circuit block diagram of a preferred embodiment of a driving video recording device capable of clicking and zooming in.

FIG. 4 is a flow chart of a preferred embodiment of a driving video recording method capable of clicking and zooming in.

400~413. . . Steps

Claims (10)

A driving video recording method capable of clicking on a zoom-in image is applicable to a driving video recording device including a lens module, a touch screen, a control unit, and a memory unit, the method comprising the following steps: Step (A) ): the driving video device is activated; the control unit can capture a dynamic image of the outside world by using the lens module, and display the dynamic image on the touch screen; step (B): continue to execute During the process of capturing and displaying the motion picture, check whether the touch screen is touched? If no, perform step (E); if yes, perform step (C); step (C): obtain a coordinate value of the touch screen touched by the touch screen, and capture the touch screen on the touch screen Touching an image frame data in the dynamic image at that time; after that, the image frame data captured is subjected to a predetermined multiple of the digital magnification processing according to the coordinate value, and thus an amplified static is obtained Image; step (D): storing the enlarged still image as an electronic file in the memory unit, and then performing step (A); step (E): performing one can be performed under a preset condition An operation in which a motion picture is stored in an electronic file in the memory unit. The driving video recording method according to the first aspect of the patent application, wherein the moving image is stored in the memory unit as an electronic file under the preset condition as described in the step (E). The operation in the system includes the following steps: Step (E1): Check whether the duration of the operation of capturing the motion image described in the step (A) has reached a preset period? If "No", go back to step (A); if "Yes", go to step (E2); Step (E2): Check if the remaining memory space of the memory unit is insufficient? If no, perform step (E4); if yes, perform step (E3); step (E3): delete the earliest image file stored in the memory unit; and step (E4): The motion picture is stored in the memory unit as an electronic file, and then returns to step (A) and re-times the operation of capturing the motion picture. As shown in the first paragraph of the patent application, the driving video recording method of the zoom-in image can be clicked, wherein the step (D) includes the following steps: Step (D1): Check whether the remaining memory space of the memory unit is insufficient. If no, perform step (D3); if yes, perform step (D2); step (D2): delete the earliest image file stored in the memory unit; and step (D3): The enlarged still image is stored in the memory unit as an electronic file. The driving video recording method according to the first aspect of the patent application, wherein the step (C) to the step (D) is performed, the step (E) is described in the preset condition. The operation of storing the motion picture in the memory unit in the form of an electronic file continues to be continued. A driving video device capable of clicking and zooming in, comprising: a touch screen for displaying an image, and when the touch screen is touched, one of the touched portions corresponding to the touched screen is generated a touch signal of a coordinate value; a lens module for capturing a dynamic image of the outside world; a memory unit; and a control unit coupled to the touch screen and the lens module, the lens module The captured dynamic image is displayed on the touch screen, and the dynamic image is stored in the memory unit as an electronic file under a preset condition; and the control unit can receive the touch screen from the touch screen. Touching the signal, and according to the touch signal and the coordinate value, capturing an image frame data in the dynamic image when the touch screen is touched; afterwards, the control unit will capture the image The image frame data is subjected to a predetermined multiple of the digital enlargement processing according to the coordinate value, and thus an enlarged still image is obtained, and the enlarged static image is stored in the memory unit as an electronic file. . The driving video recording device of claim 5, wherein the control unit further comprises an image compression video chip and a still image capturing chip, and the still image capturing chip has a static image. a digital zoom processing function; and the control unit continuously displays the motion image captured by the lens module on the touch screen, and the electronic image is electronically under the preset condition The file format is stored in the memory unit, and the image frame data is retrieved according to the touch signal and the coordinate value, and the captured image frame data is based on the coordinate value. The operation of performing digital enlargement processing for the center and storing the enlarged still image as an electronic file in the memory unit. The driving video recording device can be clicked and zoomed in, as described in claim 5, wherein the driving video recording device has a loop recording function, and the dynamic image is stored in an electronic file under the preset condition. The operation in the memory unit includes the following steps: step (E0): starting the operation of capturing the motion picture and timing; step (E1): checking the duration of the operation of capturing the motion picture Has it reached a preset period? If "No", go back to step (E0); if "Yes", go to step (E2); Step (E2): Check if the remaining memory space of the memory unit is insufficient? If no, perform step (E4); if yes, perform step (E3); step (E3): delete the earliest image file stored in the memory unit; and step (E4): The motion picture is stored in the memory unit as an electronic file, and then returns to step (A) and re-times the operation of capturing the motion picture. The driving video recording device can be clicked and zoomed in, as described in claim 7, wherein the operation of storing the enlarged still image in the electronic file in the memory unit includes the following steps. :Step (D1): Check if the remaining memory space of the memory unit is insufficient? If no, perform step (D3); if yes, perform step (D2); step (D2): delete the earliest image file stored in the memory unit; and step (D3): The enlarged still image is stored in the memory unit as an electronic file. The driving video recording device according to the fifth aspect of the patent application, wherein the memory unit comprises a built-in memory component and an external memory component, and the dynamic image and the static image are electronic The file format is stored in the external memory component; wherein the external memory component includes a card reader for accepting and accessing data in one of the external memory cards; the built-in memory component includes at least one of the following: Random access memory, hard drive, and flash memory. For example, the driving video recording device of the fifth aspect of the invention can be clicked to enlarge the image capturing device, wherein the driving video device further includes: a microphone, which can be used to capture one of the outside sounds and is coupled to the control unit. And the control unit is configured to combine the sound image with the dynamic image and then store the data in the memory unit; a power source for providing power required by the driving video device; and an input/output interface coupled to the The control unit further includes an operation interface and a signal output module; the operation interface includes a plurality of control keys for a user to operate and control the driving video device; the signal input and output module includes at least the following a digital data transmission port, an audio output terminal, and an image output terminal respectively connected to one of the external electronic devices and transmitting digital audio and video data, digital audio signals, and video playback signals; wherein the digital data transmission埠 is one of the following specifications: USB, mini-USB, and IEEE 1394.