Abstract:
A video transmission device and method thereof, which assembles required components and installs an input/output card in a portable device to form a light and handy video transmission device instead of a heavy and clumsy transmission medium in order to transmit data signals to a display device.

Description:
BACKGROUND OF THE INVENTION  
       [0001]     1. Field of the Invention  
         [0002]     The present invention relates to a peripheral device, and more particularly to a video transmission device and method thereof.  
         [0003]     2. Description of the Prior Art  
         [0004]     The digital electronic products have rapidly developed since the first calculator was invented in the whole world. However, it is not to satisfy the requirements of the different users even if the development of the computer technology that it is from the calculator to the personal computer, and further the personal computer to the super computer. Although the developments of the personal computers have gradually matured and the functionalities of the personal computers have satisfied users&#39; requirements, it is not convenient and difficult to move due to the heavy volume and clumsy weight. Hence, some portable digital electronic products have sequentially invented, such as the notebook computers, personal digital assistants (PDA) and smart phones.  
         [0005]     When these portable devices need to output data or display data, they need to combine the transmission medium such as desktop computers, note book computers etc. so that the data are transmitted to the desktop computer or note book computer and next are transmitted to the display device is connected to the desktop computer or note book computer for displaying, such as the projector, computer monitor, video monitor etc. However, if the users don&#39;t take transmission media such as a personal computer or a notebook computer along or take place a malfunction of the transmission media, the data aren&#39;t outputted and displayed by the transmission media and the display devices.  
         [0006]     In addition, the transmission media such as the personal computers or notebook computers are heavy and clumsy so that it is difficult that the users take them with themselves.  
         [0007]     The inventor of the present invention recognizes the above shortage should be corrected and special effort has been paid to research this field. The present invention is presented with reasonable design and good effect to resolve the above problems.  
       SUMMARY OF THE INVENTION  
       [0008]     It is a primary object of the present invention to provide a video transmission device instead of a heavy and clumsy transmission medium in order to transmit data signals to a display device.  
         [0009]     For achieving the primary objective stated above, a video transmission device of the present invention comprises an input/output card, a receiver-transmitter unit, a processing unit, a memory unit and a terminal output unit.  
         [0010]     When the data signals of the portable device need to be outputted, the receiver-transmitter unit receives the data signals by the input/output card and transmits the data signals received to the processing unit, and the processing unit processes the data signals and transmits the data signals processed to the terminal output end for outputting.  
         [0011]     According to the video transmission device and method thereof, the receiver-transmitter unit of the video transmission device further comprises a receiving channel to receive a control signal from a remote controller so as to assist an operation of the video transmission device and increase a functionality of the video transmission device.  
         [0012]     According to the video transmission device and method thereof, the memory unit of the video transmission device further comprises an extension slot interface so that an external memory can be installed in the video transmission device and transmits the data signals to the terminal output unit for outputting.  
         [0013]     It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the invention as claimed. Other advantages and features of the invention will be apparent from the following description, drawings and claims. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0014]     The above and further advantages of this invention may be better understood by referring to the following description, taken in conjunction with the accompanying drawings, in which:  
         [0015]      FIG. 1  is a system block diagram of a video transmission device of the present invention; and  
         [0016]      FIG. 2  is a flowchart of the video transmission device for transmitting data signals of the present invention. 
     
    
       [0017]     The drawings will be described further in connection with the following detailed description of the present invention.  
       DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0018]     Reference is made to  FIG. 1  which is a system block diagram of a video transmission device of the present invention. A video transmission system comprises a video transmission device  100 , a portable device  160  and a remote controller  170 . The video transmission device  100  comprises a memory unit  110 , a processing unit  120 , a receiver-transmitter unit  130 , a terminal output unit  140  and an input/output card  150 .  
         [0019]     The portable device  160  is used to input data signals to the video transmission device  100  and further display the data signals inputted, so the portable device  160  can be a personal digital assistant (PDA) or a portable phone.  
         [0020]     The remote controller  170  is used to input a control signal to the video transmission device  100  by transmitting infrared rays so as to assist an operation of the video transmission device  100 .  
         [0021]     The memory unit  110  comprises a first memory  111 , a second memory  112 , a third memory  113  and a fourth memory  114 . The first memory  111  is used to store system data such as programs, commands and so on for the processing unit  120 , so the first memory  111  can be a flash memory. The second memory  112  is used to store operation messages operated by the processing unit  120 , so the second memory  112  can be a frame memory. The third memory  113  is used to temporarily store operation messages that are produced while the processing unit  120  processes the data signals, so the third memory  113  can be a synchronous dynamic random access memory (SDRAM). The fourth memory  114  is installed in the video transmission device  100  by an extension slot interface (not shown) for transmitting the data signals stored in the fourth memory  114  to the terminal output unit  140  for outputting, so the fourth memory  114  can be an external memory.  
         [0022]     The processing unit  120  is connected with the memory unit  110 , the receiver-transmitter unit  130  and the terminal output unit  140 , and comprises a processor  121  and an operator  122 . The processor  121  creates a data path for controlling an inside operation of the video transmission device  100  by the system data of the first memory  111  so as to receive the data signals inputted by the receiver-transmitter unit  130  and transmit the data signals to the operator  122  for a data operation; during the operation of the processing unit  120 , the operation messages are stored in the third memory  113  and either stored in the second memory  112 , so the operator  122  can be a digital signal processing chip (DSP chip) and the processing unit  120  can be a DSP digital image engine.  
         [0023]     The receiver-transmitter unit  130  comprises a first receiver-transmitter end  131  and a second receiver-transmitter end  132 . The first receiver-transmitter end  131  is used to receive the data signals inputted by the portable device  160 , so the first receiver-transmitter end  131  can be a secure digital input/output end.  
         [0024]     The second receiver-transmitter end  132  is used to provide a receiving channel to receive the control signal from the remote controller  170  and transmit the control signal to the processing unit  120  and further assists an operation of the video transmission device  100  and increases a functionality of the video transmission device  100 , so the second receiver-transmitter end  132  can be an infrared remote control interface.  
         [0025]     The terminal output unit  140  comprises a first output end  141  and a second output end  142 . The first output end  141  is used to encode the data signals inputted by the processing unit  120  and outputs the encoded data signals to a display device, so the first output end  141  can be an encoder. The second output end  142  is used to reassemble the data signals inputted by the processing unit  120  and transmit the data signals reassemble to a display device (not shown), so the second output end  142  can be a de-interlacer. Here, the display device can be a TV monitor, projector or a computer monitor.  
         [0026]     The input/output card  150  is connected with the first receiver-transmitter end  131  of the video transmission device  100  by a cable and installed in a slot of the portable device  160 . Moreover, the portable device  160  sends the data signals that stored in the portable device  160  to the first receiver-transmitter end  131  through the input/output card  150 , so the input/output card  150  can be a secure digital input/output card.  
         [0027]     The above embodiment is described in  FIG. 2 . At step S 210 , a device power of the video transmission device  100  is switched on, the display device connected with the video transmission device  100  shows a status signal of the video transmission device  100 . At step S 220 , the processing unit  120  starts to detect whether the input/output card  150  is installed in the portable device  160  or not according to the system data stored in the first memory  111 . If the processing unit  120  detects which the input/output card  150  has not been installed in the portable device  160 , the video transmission device  100  will output an un-installed status signal (the un-installed status signal means no input/output card  150  in the portable device  160 ) to the display device and continue to detect whether the input/output card  150  is installed in the portable device  160  or not; if the processing unit  120  detects that the input/output card  150  has been installed in the portable device  160 , the display device will show an installed status signal (the installed status signal means that there is a input/output card  150  in the portable device  160 ) and proceeds to next step. At step S 230 , the processing unit  120  further detects whether there is at least one data signal that is required to be sent to the video transmission device  100  or not. If the processing unit  120  detects no data signal, the processing unit  120  outputs an un-received status signal (the un-received status signal means that there is no data signal) to the display device and continues to detect whether there is at least one data signal in the portable device  160 ; if the processing unit  120  detects that there is at least one data signal, the transmission device  100  further receives the data signal from the portable device  160  based on the input/output card  150  connected with the first receiver-transmitter end  131  for next step, and display device shows a received status signal (the status signal means that the transmission device  100  has to receive the data signal). At step S 240 , the processing unit  120  processes the data signal according to the system data stored in the first memory  111 , and the operation messages produced by the processing unit  120  are temporarily stored in the third memory  113  and either stored in the second memory  112 . At step S 250 , the terminal output unit  140  outputs the data signals that are processed by the processing unit  120 . If the video transmission device  100  is connected to the display device (not shown), the terminal output unit  140  will send the data signal and a display status signal (the display status signal means the display device will show the data signal) to the display device. At Step S 260 , the processing unit  120  continuously detects whether the portable device  160  still has any data signal standby showed on display device. If the processing unit  120  detects at least one data signal standby, the process will return to step S 220  and continue the stated above operations. If the processing unit  120  detects no data signal standby, the video transmission device  100  will stop all of the above process such as receiving any data signal, processing data signals and outputting data signals at step S 270 . During the process of transmitting data signals, the remote controller  170  can input a control signal to assist the operation of the video transmission device  100  so as to provide more services of processing the data signals.  
         [0028]     Besides the portable device  160 , the video transmission device  100  can receive the data signal from the external fourth memory  114  through the extension slot interface and further operate all of the above process.  
         [0029]     Further speaking, if the video transmission device  100  is connected to a TV monitor or a projector, according to the system data stored in the first memory  111 , the processing unit  120  will transmit the processed data signal to the first output end  141  of the terminal output unit  140 . The terminal output unit  140  will encode the data signal as a first output signal and send the first output signal to the TV monitor or the projector. Here, the first output signal can be a video signal or an S-video signal.  
         [0030]     On the other way, if the video transmission device  100  is connected to a computer monitor or the projector, according to the system data stored in the first memory  111 , the processing unit  120  will transmit the data signals to the second output end  142  of the terminal output unit  140 . The terminal output unit  140  will interlace the data signal as a second output signal, and send the second output signal to the computer monitor or the projector. Here, the second output signal can be a VGA output signal.  
         [0031]     In addition, the first receiver-transmitter end  131  of the receiver-transmitter unit  130  has a compatibility of one bit and four bits to provide the portable device  160  for inputting the data signals.  
         [0032]     The video transmission device of the present invention has the following advantages:  
         [0033]     1. It is to assemble required components and install an input/output card in a portable device so as to form a light and handy video transmission device;  
         [0034]     2. A remote controller is used to assist the video transmission device and increase a functionality of the video transmission device;  
         [0035]     3. The data signals can be transmitted to the display device by the video transmission device, even if the users don&#39;t take transmission media such as a personal computer or a notebook computer along or take place a malfunction of the transmission media;  
         [0036]     4. The video transmission device is smaller and lighter so it is to greatly increase a convenience for operating;  
         [0037]     5. The video transmission device provides a receiving channel to receive the control signal inputted by the remote controller and further assists an operation of the video transmission device and increases a functionality of the video transmission device; and  
         [0038]     6. The fourth memory is installed in the video transmission device by an extension slot interface for transmitting the data signals in the fourth memory to the terminal output unit for outputting.  
         [0039]     Although the present invention has been described with reference to the preferred embodiment thereof, it will be understood that the invention is not limited to the details thereof. Various substitutions and modifications have been suggested in the foregoing description, and others will occur to those of ordinary skill in the art. Therefore, all such substitutions and modifications are intended to be embraced within the scope of the invention as defined in the appended claims.