KR100751143B1 - Wireless television, wireless televison system, and control method thereof - Google Patents

Abstract

The present invention relates to a wireless television device, a wireless television system, and a control method thereof. More particularly, the control signal is not transmitted or received within a predetermined time set by a user in transmitting and receiving a control signal between a main television and a sub television. The present invention relates to a wireless television device, a wireless television system, and a control method thereof, which automatically enable retransmission of the control signal if not.

To this end, the transmitter-side wireless television apparatus according to the present invention receives a signal transmitter for transmitting control signal packet data to another television apparatus, and a response signal generated when the other television apparatus normally receives all frames of the packet data. And a signal receiver for determining whether the first frame of the packet data transmitted to the other television device is normal and monitoring whether or not the response signal is received within a time set by the user. And a control unit for controlling to be automatically retransmitted.

In addition, the receiving wireless television apparatus according to the present invention includes a signal receiving unit for receiving control signal packet data from another television apparatus, and a retransmission request signal of the packet data when all frames of the control signal packet data are not successfully received. And a control unit for controlling to transmit the retransmission request signal when the control signal packet data is not received within a time set by the user.

Wireless television system, transmission / reception control unit, response signal, control signal, retransmission

Description

Wireless television device, wireless television system and control method thereof {Wireless television, wireless televison system, and control method}

1 is a schematic diagram illustrating a typical wireless television system.

2 is a block diagram showing a wireless television system according to an embodiment of the present invention.

3 is a configuration diagram schematically illustrating a control unit of a main television device according to an embodiment of the present invention.

4 is a configuration diagram schematically illustrating a control unit of a sub television apparatus according to an embodiment of the present invention.

5 is a flowchart illustrating a control method of a main television device according to an embodiment of the present invention.

6 is a flowchart illustrating a control method of a sub television apparatus according to an embodiment of the present invention.

<Explanation of symbols for main parts of the drawings>

110: main television 120: sub television

213: main control unit 223: sub control unit

213c: main temporary storage unit 213d: response flag determination unit

213e: main timer control unit 223c: sub temporary storage unit

223d: valid data determination unit 223e: sub-timer control unit

The present invention automatically retransmits the control signal when the control signal is not transmitted or received within a predetermined time set by the user in transmitting and receiving the control signal between the main television and the sub television to improve the operation reliability of the system. The present invention relates to a control method of a possible wireless television system.

In general, wireless communication systems are not restricted by geopolitical installation because they do not use cables, and there is no need to expand or change the lines even when the terminal location is changed or added or deleted. There is an advantage that can be significantly reduced, the movement to implement a wireless communication environment using radio waves, light (infrared light), etc. instead of the wired communication environment has recently been active.

In such an atmosphere, the television device, which can be viewed by a wired cable connection in the related art, also enables viewing without limitation of space by wireless. Such a wireless television system will be described with reference to FIG. 1.

1 is a schematic diagram illustrating a typical wireless television system.

As shown in the drawing, the wireless television system 100 relays a video signal input through a broadcast signal, a DVD / VCR signal, or an S-video signal input ports 111 and 112 to transmit to the sub-TV 120 as well. A sub-television 120 including a main television 110 and a key pad unit 124 for allowing a television to be watched on its own, and wirelessly receiving an image to be freely viewed at a desired place by a user, and It is configured to include a remote control (not shown) for inputting a user's control command.

In addition, the main television 110 and the sub-TV 120 is a wireless LAN for transmitting and receiving images and control signals so that the main television 110 and the sub-TV 120 can interoperate with each other. And a control unit (CPU) for controlling transmission and reception of the video object and a control signal.

For a more detailed description of such a wireless television system, please refer to Korean Patent Application No. 2005-55505.

However, in the above-described conventional technology, when a control signal is transmitted and received between the main television 110 and the sub television 120, a function of informing the user or automatically retransmitting a loss or loss of the packet data for the control signal occurs. Did not provide.

For example, when the packet data for the tuner control signal of the main television 110 for changing the broadcast channel being watched on the sub-TV 120 is not effectively transmitted, the packet data for the tuner control is lost or lost. It was not possible to inform the user that a loss occurred or to automatically retransmit the previously transmitted tuner control packet data.

Accordingly, there is a problem that the user has to wait for more than a predetermined time and then repeatedly control the remote controller or the like so that the same control signal as the previously transmitted control signal can be retransmitted.

Accordingly, the present invention has been proposed to solve the above-mentioned problems, and a wireless television device which detects when a control signal is not effectively transmitted and received and notifies a user and automatically retransmits a previously transmitted control signal. To provide a wireless television system and a control method thereof.

A transmitter-side wireless television apparatus according to an embodiment of the present invention for achieving the above object includes a signal transmitter for transmitting a video object and a control signal packet data selected by a user to another television apparatus, and in the other television apparatus. A signal receiver for receiving a response signal generated when all the frames of the packet data are normally received, and whether or not the first frame of the packet data transmitted to the other television device is normal; And a control unit for monitoring whether the control signal packet data is automatically retransmitted by monitoring whether the received signal is received within a set time.

At this time, if it is determined that the first frame of the transmitted control signal packet data is abnormal, it is preferable to retransmit the control signal packet data without determining whether a response signal is received within the set time.

In addition, the receiving wireless television apparatus according to an embodiment of the present invention is a signal receiving unit for receiving the video data and control signal packet data selected by the user from another television device, and all the frames of the control signal packet data successfully received If not, the signal transmission unit for transmitting the retransmission request signal of the packet data and whether the control signal packet data is successfully received within a time set by the user, and if the control signal packet data is not received the retransmission request And a control unit for controlling the signal to be transmitted.

At this time, if it is determined that the first frame of the received control signal packet data is abnormal, the controller is configured to control to transmit the retransmission request signal of the control signal packet data without determining whether the predetermined time has elapsed. It is desirable to have.

Furthermore, the wireless television system according to the present invention is characterized by including the same configurations as the transmitting and receiving wireless television apparatus as described above.

On the other hand, the control method of the transmitting-side wireless television device according to an embodiment of the present invention for achieving the above object comprises the steps of determining whether the first frame of the control signal packet data transmitted to the other television is in a normal state; Operating a timer for determining whether a predetermined time set by a user has elapsed when the first frame of the packet data is in a normal state; and when the frames of the packet data are all transmitted, the set time Determining whether a response signal transmitted from the other television is received within a second time period, and if the response signal is not received, retransmitting the transmitted packet data.

In this case, if it is determined that the first frame of the transmitted control signal packet data is abnormal, the method may further include retransmitting the control signal packet data without determining whether a response signal is received within the set time.

In addition, the control method of the on-time wireless television device according to an embodiment of the present invention comprises the steps of determining whether the first frame of the control signal packet data received from the other television is in a normal state, and the first frame of the packet data In a normal state, operating a timer for determining whether a time set by a user has elapsed; determining whether all frames of the packet data are received within the set time; and all within the set time. Requesting retransmission of the control signal packet data to the other television if a data packet has not been received.

In this case, if it is determined that the first frame of the received control signal packet data is abnormal, the method may further include requesting retransmission of the control signal packet data without determining whether a predetermined time has elapsed by operating the timer. Do.

Hereinafter, a wireless television apparatus, a wireless television system, and a control method thereof according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a schematic view showing a wireless television system according to a preferred embodiment of the present invention, FIG. 3 is a schematic view showing a control unit of a main television device according to a preferred embodiment of the present invention, and FIG. A configuration diagram schematically showing a control unit of a sub television apparatus according to a preferred embodiment of the present invention.

First, as shown in FIG. 2, the wireless television system 200 not only transmits an image input through various signal input ports to the sub-TV 220, but also watches a selected image such as a broadcast channel in itself. A sub-television 220 including a main television 210 for enabling the display, a keypad 224 for receiving and displaying the video material for free viewing at a desired place, and for inputting a user's control command. And a remote controller (not shown).

The main television 210 performs signal processing so that an external signal input unit 217 including a tuner 217a and a video signal interface 217b for tuning a received broadcast channel, and an image of the tuned broadcast channel are suitable for display. A main video output unit 214 including a video signal processing unit 214a for displaying and a display unit 214b for displaying the video object, and a video object or a control signal transmitted to the sub-TV 220 for wireless transmission. A main signal transmitter 215 including an encoder 215a for encoding and a main WLAN (215) for controlling wireless transmission, and a main signal for receiving control signals transmitted from the sub-TV 220 The receiver 216 and the main control unit 213 are configured.

As shown in FIG. 3, the main controller 213 is a main transmission / reception control unit 213b for controlling transmission and reception of broadcast signals and control signals, and a main for temporarily storing control signals transmitted to the sub-TV 220. A response flag determination unit 213d for determining whether a temporary storage unit 213c and a response flag (ACK_Flag) for notifying the control signal packet data are successfully received by the sub-television 220; And a main timer control unit 213e for determining whether the response flag is received within a predetermined time set by the user, and a main micom 213a for performing a predetermined logical operation.

Therefore, in the main television 210 of the present invention, the control signal packet data for controlling the sub television 220 is transmitted through the main signal transmitter 215, and the response flag determination unit 213d and the main timer control unit 213e are used. If it is determined that the response flag has not been received within a predetermined time (preferably within 2 [sec] in consideration of the transmission and reception environment), it is determined that the control signal is not effectively transmitted to the sub-TV 220. It is possible to automatically retransmit the transmitted control signal.

In addition, if necessary, an OSD (On Screen Display) generation unit (not shown) of the main television 210 may be controlled or a warning sound may be generated to alert the user that an error has occurred in transmission of packet data.

In addition, if it is determined that an error occurs in the first frame of the control signal packet data stored in the main temporary storage unit 213c, it is not necessary to monitor whether or not a response flag is received within a predetermined time. It is also possible to retransmit the transmitted packet data.

However, the automatic retransmission of the control signal may be set within a predetermined number in consideration of the load aspect of the system process. The number of retransmissions is limited by increasing the index of packet data for each transmission and stopping retransmission when the index set by the user is reached.

Meanwhile, the sub-TV 220 may include a keypad 224 for inputting a user's command, a sub-WLAN 221a for receiving an image and a control signal transmitted from the main television 210. A sub-image receiver 221 including a decoder 221b, a sub-image output unit 225 including a sub-image signal processor 225b and a sub-display unit 225a for signal processing the decoded image to be suitable for display. ), A sub signal transmitter 222 for transmitting a control signal to the main television 210, and a sub controller 223.

As illustrated in FIG. 4, the sub control unit 223 temporarily stores the sub transmission / reception control unit 223b for controlling transmission and reception of the video object and the control signal, and the packet data for the control signal transmitted from the main television 210. The sub temporary storage unit 223c, the valid data determination unit 223d for determining whether the packet data stored in the sub temporary storage unit 223c is valid, and the packet data normally within a predetermined time set by the user. And a sub-timer control unit 223e for determining whether or not it has been received, and a sub-microcom 223a for performing a predetermined logical operation.

Accordingly, the sub-TV 220 of the present invention is previously transmitted when the packet data transmitted from the main television 210 is not effectively received within a predetermined time set by the user (preferably 20 [msec]). The main television 210 can be automatically requested to retransmit the control signal.

Further, if it is determined that the first frame of the received control signal packet data is not normal, it is possible to request retransmission of the packet data for the transmission control signal without having to determine whether all the packet data frames are received within the set time. do.

Hereinafter, a control method of a wireless television system according to a preferred embodiment of the present invention will be described in detail. Referring to the control method of the wireless television system of the present invention, a clearer understanding of the configuration of the wireless television system described above will be possible.

However, hereinafter, the control signal is transmitted from the main television to the sub television will be described as an example.

5 is a flowchart illustrating a control method of a main television device according to an exemplary embodiment of the present invention.

Referring to FIG. 5 with reference to FIGS. 2 and 3, first, when the control signal such as adjusting the volume and image quality of the sub-TV 220 is not being transmitted, the main television 210 enters the standby mode (S301). Is set.

In the standby mode (S301), the control signal packet data is started to be transmitted through the main WLAN 215b and the main antenna (not shown), and when the first frame of the packet data is transmitted (S302), the first The data frame is stored in the main temporary storage unit 213c, and the main valid data determination unit (not shown) determines whether the stored first data frame is normal data conforming to the serial communication data standard (S303).

If it is determined that the data frame is not a normal data frame, the first data frame stored in the main temporary storage unit 213c is invalidated (S304), and the packet data for the control signal previously transmitted is automatically retransmitted (S305a).

At this time, preferably, the main television 210 generates an OSD screen or a warning sound (S305b) so that the user can recognize that the packet data received by the sub-TV 220 is not valid. When the OSD screen or warning sound is to be generated in the main television 210, the main controller 213 may control the OSD generator (not shown) and the speaker.

If it is determined that the first data frame transmitted is normal, the main timer controller 213e operates the timer (S306) to determine whether a predetermined time set by the user (preferably, 2 [sec]) has elapsed. Can be determined.

When the timer is operated (S306), the above valid data determination unit 223d determines whether or not all the frames have been transmitted so that the packet data can perform one command (S307).

That is, in a general television apparatus, one control signal packet data is composed of 8 bytes, and each byte constitutes one data frame as described above, so that transmission is completed from the first data frame to the eighth data frame. Determine if

However, the second to eighth data frames at this time do not go through the validation check as described above.

This means that in the case of serial communication, if the first data frame is normally transmitted, the second and subsequent data frames have a very low probability of loss and improve the data processing speed. This is because it is preferable not to perform validation on the data frame.

In addition, when a loss occurs in any one or more of the second and subsequent data frames after transmitting all data frames, the response flag is not transmitted from the sub-television 220 within the set time as described later. This is because the data can be replaced by retransmitting the transmitted packet data for the control signal.

As a result of determining whether all the frames have been transmitted, when it is determined that the transmission is completed, it is determined whether 2 [sec] has elapsed as an example since the timer is operated (S308).

If it is determined that 2 [sec] has not elapsed, it waits until 2 [sec] has elapsed. If it is determined that 2 [sec] is exceeded, it is determined whether or not a response flag is received (S309). The response flag means a signal transmitted from the sub-TV 220 to the main television 210 when the sub-TV 220 normally receives all the frames of the packet data and enables the control.

If it is determined that the response flag is not received, the packet data for the control signal transmitted is retransmitted (S310), and if necessary, an OSD screen or a warning sound is generated (S311). If it is determined that the response flag is received, the sub-TV 220 It is determined that valid control has been made, and the interrupt routine set for transmitting the control signal is reset (S312).

On the other hand, if it is determined that transmission has not been completed as a result of determining whether all frames have been transmitted, the response flag will not be received from the sub-television 220. Therefore, it is determined whether 2 [sec] has elapsed. Packet data can be retransmitted.

Although not shown, it may be desirable to determine whether the transmission of all the frames has been completed so that a predetermined time can be set so that transmission can be completed within the corresponding time, in particular the same as the response flag signal reception waiting time described above. It would be desirable to set it to 2 [sec].

Subsequently, it is determined whether the system is to be shut down, such as when the power is turned off by the user (S313). If the system is terminated, the above-described process is terminated. If the system is not terminated, the above-described process can be repeated. The standby mode (S301) is set.

Hereinafter, a control method of a sub television device according to an exemplary embodiment of the present invention will be described.

6 is a flowchart illustrating a control method of a sub television apparatus according to the present invention.

Referring to FIG. 6 with reference to FIGS. 2 and 4, when a control signal such as adjusting the volume and image quality of the sub-TV 220 is not transmitted from the main television 210, the sub-TV 220 will The standby mode is set (S401).

In the standby mode (S401), the control signal packet data transmitted from the main television 210 through the sub antenna (not shown) and the sub wireless LAN 221a starts to be received, and the first frame of the packet data is received ( S402) When completed, the first data frame is stored in the sub temporary storage unit 223c, and the valid data determination unit 223d determines whether the stored first data frame is normal data conforming to the serial communication data standard. (S403).

If it is determined that the first data frame is not normal, the data frame stored in the sub temporary storage unit 223c is invalidated (S404) and retransmission of the control signal packet data previously transmitted to the main television 210 is performed. Request (S405a).

If necessary, the sub-TV 220 may generate an OSD or a warning sound (S405b) so that the user can recognize that the received packet data is not valid.

If it is determined that the first data frame is normal, the sub-timer controller 223e operates the timer (S406) to determine whether or not a predetermined time (preferably, 20 [msec]) set by the user has elapsed. To help.

When the timer is operated, the above valid data determination unit 223d determines whether all data frames have been received so that the packet data can perform one command (S407). That is, it is determined whether all receptions are completed from the first data frame to the eighth data frame.

It has already been mentioned that no validation is performed on the second to eighth frames.

However, if a loss occurs in the second and subsequent data frames after receiving all the data frames, the control using the packet data will be impossible, and thus, the main television 210 cannot receive the response flag as described above. Instead, try to retransmit the transmitted packet data.

On the other hand, if it is determined that the reception of the packet data is not completed, it is determined whether 20 [msec] has elapsed since the timer is operated (S408).

If it is determined that 20 [msec] has not elapsed, it is determined whether or not packet data is completed until 20 [msec] has elapsed, and if the reception of packet data has not been completed by the time exceeding 20 [msec], the sub The TV 220 requests a retransmission of the control signal previously transmitted to the television 220 (S409). If necessary, generates an OSD and a warning sound (S410).

However, when it is determined that the reception of the packet data is completed, a control command corresponding to the received packet data is performed (S411).

If all the frames of the received packet data are normal, a response flag is transmitted to the main television 210 as the control command is successfully performed (S412), and the interrupt routine for performing the control command is reset (S413). .

On the other hand, if the received data frame is abnormal, the control command is not successfully performed, and thus the response flag is not transmitted to the main television 210, so that the main television 210 automatically retransmits the packet data.

Subsequently, it is determined whether the system is to be shut down, such as when the power is turned off by the user (S414). If the system is terminated, the above-described process is terminated. If the system is not terminated, the above-described process can be repeated. The standby mode (S401) is set.

The wireless television device, the wireless television system and the control method thereof according to the present invention have been described above. Such a technical configuration of the present invention will be understood by those skilled in the art that the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention.

In particular, in the above description, a control signal is transmitted from the main television 210 to the sub television 220 as an example, but on the contrary, a signal for controlling a tuner or the like in the sub television 220 is transmitted to the main television 210. It will be apparent to those skilled in the art that the present invention can be applied even in the case of transmission.

Accordingly, the embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following claims rather than the foregoing description, and the meanings of the claims and All changes or modifications derived from the scope and the equivalent concept should be construed as being included in the scope of the present invention.

According to the wireless television apparatus, the wireless television system, and the control method of the present invention as described above, when the control signal is not normally transmitted or received, the control signal can be automatically retransmitted, thereby improving the operation reliability of the system and the user. Convenience can be improved.

Furthermore, when the control signal is not normally transmitted or received, the user can be alerted to provide the user with status information of the system.

Claims (10)

A signal transmitter for transmitting the video object and the control signal packet data selected by the user to another television apparatus; A signal receiver for receiving a response signal generated from the other television device when the other television device normally receives all the frames of the packet data; And Determining whether the first frame of the packet data transmitted to the other television device is normal and monitoring whether the response signal is received within a time set by the user, thereby controlling the packet data for the control signal to be automatically retransmitted. Control unit Wireless television device comprising a. The method of claim 1, If it is determined that the first frame of the transmitted control signal packet data is abnormal, the controller is configured to control the control signal packet data to be retransmitted without determining whether a response signal is received within the set time. Wireless television device. A signal receiving unit for receiving a video object selected by a user and packet data for a control signal from another television apparatus; A signal transmitter for transmitting a retransmission request signal of the packet data when all the frames of the control signal packet data are not successfully received; And A control unit for monitoring whether the control signal packet data is successfully received within a time set by a user and controlling the retransmission request signal to be transmitted when the control signal packet data is not received Wireless television device comprising a. The method of claim 3, wherein If it is determined that the first frame of the received control signal packet data is abnormal, the controller controls the retransmission request signal of the control signal packet data to be transmitted without determining whether the predetermined time has elapsed. Wireless television device. A main signal transmitter for transmitting the video data and the control signal packet data selected by the user to the sub-TV, and for receiving a response signal generated from the sub-TV apparatus when all the frames of the packet data are normally received in the sub-TV. A main television having a main signal receiving unit and a main control unit for monitoring whether the response signal is received within a time set by a user and controlling the packet data for the control signal to be automatically retransmitted when the response signal is not received; And A sub-signal receiver for receiving the video data and the control signal packet data from the main television, and a sub-signal transmitter for transmitting the retransmission request signal of the packet data when all the frames of the control signal packet data are not successfully received; A sub-television having a sub-control unit for monitoring whether the control signal packet data is successfully received within a time set by a user and controlling the retransmission request signal to be transmitted when the control signal packet data is not received Wireless television system comprising a. The method of claim 5, If it is determined that the first frame of the transmitted control signal packet data is abnormal, the main controller controls the control signal packet data to be retransmitted without determining whether a response signal is received within the set time, and the sub controller controls the And if it is determined that the first frame of the received control signal packet data is abnormal, the wireless television system controls to transmit a retransmission request signal of the control signal packet data without determining whether the predetermined time has elapsed. . Determining whether the first frame of the control signal packet data transmitted to the other television is in a normal state; Operating a timer for determining whether a predetermined time set by a user has elapsed when the first frame of the packet data is in a normal state; When all the frames of the packet data are transmitted, determining whether a response signal transmitted from the other television is received within the set time; If the response signal has not been received, retransmitting the transmitted packet data Control method of a wireless television device comprising a. The method of claim 7, wherein And re-transmitting the control signal packet data without determining whether a response signal is received within the set time when it is determined that the first frame of the transmitted control signal packet data is abnormal. Control method of the device. Determining whether the first frame of the control signal packet data received from another television is in a normal state; When the first frame of the packet data is in a normal state, operating a timer for determining whether a time set by a user has elapsed; Determining whether all frames of the packet data are received within the set time; Requesting retransmission of the control signal packet data to the other television if all data packets have not been received within the set time; Control method of a wireless television device comprising a. The method of claim 9, If it is determined that the first frame of the received control signal packet data is abnormal, requesting retransmission of the control signal packet data without determining whether a predetermined time has elapsed by operating the timer. Control method of a wireless television device.

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