KR20110085201A - Media signal transferring system and transferring method for the same - Google Patents

Abstract

PURPOSE: A media signal transceiving system and a media signal transceiving method thereof are provided to control resolution of an image to correspond to the resolution of an image capable of processing in a receiving device. CONSTITUTION: A wireless communication unit(120) transmits a media signal to a receiving device. The wireless communication unit receives a response signal which the receiving device transmits by corresponding to the transmitted media signal. A media box(110) distinguishes a signal transmission state of the wireless network based on the response signal. The media box distinguishes resolution of an image which can be processed in the receiving device. The media box controls a resolution of an image based on an image signal including the media signal if the distinguished signal transmission state is under the reference value. The media box controls the wireless communication unit to transmits a media signal including the image signal to receiving device. The media box controls a resolution of the image to correspond to the resolution of the distinguished receiving device.

Description

Media signal transmission system and method for transmitting and receiving the media signal {Media Signal Transferring System and Transferring Method for the Same}

The present invention relates to a media signal transmission and reception system and a media signal transmission and reception method thereof. The media signal transceiving system according to the present invention can transmit and process at least one media signal input from an external device, and can display an image based on the received media signal after receiving the media signal transmitted from the transmission device. It includes a receiving device. The media signal transmission / reception method of the media signal transmission / reception system according to an embodiment of the present invention relates to a method for transmitting / receiving a signal when a signal transmission environment of a wireless network where a transmission device and a reception device transmit and receive a wireless signal is equal to or less than a reference value.

In general, an image display device receives and processes a media signal including a video signal and an audio signal from an airwave, a cable, and other external devices (VCR, DVD, etc.), and outputs a video based on the processed signal. It may be configured as a display module for displaying on the screen.

On the other hand, the receiving module and the display module may be configured separately from each other. Recently, a media signal transmission / reception system for transmitting an externally input media signal to a display unit using a wireless signal and displaying an image based on an image signal included in the media signal has been provided.

One object of the present invention is to provide a media signal transmission and reception system and a method for transmitting and receiving a media signal such that a receiving apparatus including a display unit capable of displaying an image on a screen can wirelessly receive a media signal.

It is also an object of the present invention to provide a media signal transmission and reception system and a method for transmitting and receiving a media signal including a transmission device capable of adjusting the resolution of an image so as to correspond to the resolution of an image that can be processed by the reception apparatus.

A media signal transmission method according to an embodiment of the present invention for achieving the above object is a media signal transmission method of a transmission device for transmitting a media signal to a reception device using a wireless network, the signal transmission state of the wireless network is determined Making; Determining a resolution of an image that can be processed by the receiving device; Adjusting the resolution of an image included in the media signal when the determined signal transmission state is equal to or less than a reference value; And transmitting a media signal including an image signal constituting the image of which the resolution is adjusted; The resolution adjusting step may include adjusting the resolution of the image to correspond to the resolution of the determined receiving apparatus.

In addition, the media signal receiving method according to an embodiment of the present invention for achieving the above object, in the media signal receiving method of the receiving apparatus for receiving the media signal transmitted by the transmitting apparatus using a wireless network, the signal of the wireless network Determining a transmission state; Transmitting information about a resolution of an image that can be processed when the signal transmission state is equal to or less than a reference value to the transmitting device; Receiving a media signal transmitted by the transmitting device; And displaying an image based on the image signal included in the media signal, wherein the transmitting device is based on the image signal included in the media signal according to the information about the resolution transmitted by the receiving device. Characterized in that the resolution of the adjustment.

In addition, the media signal transmission and reception method according to an embodiment of the present invention for achieving the above object, transmitting the media signal to a receiving device capable of displaying an image based on the video signal contained in the media signal received using a wireless network A method of transmitting and receiving a media signal of a transmitting device, the method comprising: determining, by the transmitting device, a signal transmission state of the wireless network; Determining, by the transmitting device, a resolution of an image that can be processed by the receiving device; Adjusting the resolution of an image based on an image signal included in a media signal when the determined signal transmission state is equal to or less than a reference value; Transmitting, by the transmitting apparatus, a media signal including an image signal constituting the image whose resolution is adjusted to the receiving apparatus; And the receiving device receiving a media signal transmitted by the transmitting device; The transmitting apparatus may adjust the resolution of an image based on the image signal included in the media signal so as to correspond to the resolution of the determined receiving apparatus.

In addition, a media signal transmission apparatus according to an embodiment of the present invention for achieving the above object is a transmission apparatus for transmitting a media signal to a reception apparatus using a wireless network, the media signal is transmitted to the reception apparatus, the transmission A wireless communication unit which receives a response signal transmitted by the receiving device in response to a media signal; And determining a signal transmission state of the wireless network based on the response signal, determining a resolution of an image that can be processed by the receiving device, and when the determined signal transmission state is equal to or less than a reference value, the image included in the media signal. A media box for controlling the wireless communication unit to adjust a resolution of an image based on a signal and to transmit a media signal including an image signal constituting the adjusted image to the receiving device; When adjusting the resolution of the image, the media box may adjust the resolution of the image to correspond to the resolution of the determined receiving apparatus.

In addition, a media signal receiving apparatus according to an embodiment of the present invention for achieving the above object is a receiving apparatus for receiving a media signal transmitted by a transmitting apparatus using a wireless network, wherein the transmitting apparatus transmits through the wireless network. A wireless communication unit for receiving a media signal; A display unit which displays an image based on an image signal included in the media signal received through the wireless communication unit; And determining a signal transmission state of the wireless network based on the received media signal, and when the signal transmission state is equal to or less than a reference value, information about a resolution of an image that can be processed by the receiving device is transmitted to the transmitting device. And a signal processing unit for controlling a wireless communication unit, wherein the transmitting device adjusts the resolution of an image based on the image signal included in the media signal according to the information about the resolution transmitted by the receiving device.

In addition, the media signal transmission and reception system according to an embodiment of the present invention for achieving the above object, and a receiving device capable of displaying an image based on the video signal contained in the media signal received using a wireless network, A media signal transmitting and receiving system comprising a transmitting device for transmitting a media signal, the transmitting device determining a signal transmission state of the wireless network, and determining the resolution of an image that the transmitting device can process in the receiving device. And a media including a video signal configured to adjust a resolution of an image based on the video signal included in a media signal by the transmitting apparatus according to the determined signal transmission state, and to configure an image of which the transmitting apparatus adjusts the resolution. Transmits a signal to the receiving apparatus, and the receiving apparatus transmits the transmitting apparatus It characterized in that for receiving a media signal, and the transmitter is characterized in that for adjusting the resolution of the image that is based on an image signal included in the media signal to correspond to the resolution of the determination by the receiving device.

According to the present invention, a user can arrange a receiving device including a display unit capable of displaying an image in a desired place without restriction of wiring. In addition, various types of media signals may be received using the transmitter. The media signal input to the transmitting device may be converted (converted) into a wireless signal and transmitted to the receiving device. The resolution of the image based on the image signal included in the media signal may be adjusted according to the signal transmission state of the wireless network.

1 is a block diagram showing the configuration of a media signal transmission and reception system according to an embodiment of the present invention;
2 is a block diagram showing the inside of a media signal transmitting apparatus and a receiving apparatus according to an embodiment of the present invention;
3 is a flowchart illustrating a flow of a method for transmitting a media signal according to an embodiment of the present invention;
4 is a flowchart showing a flow of a method for receiving a media signal according to an embodiment of the present invention;
5 is a view provided to explain a media signal transmission and reception method of a media signal transmission and reception system according to an embodiment of the present invention.

Disclosure of Invention An object of the present invention is to provide a media signal transmission / reception system and a method for transmitting / receiving a media signal that can efficiently transmit and receive a media signal using wireless communication. Hereinafter, a media signal transceiving system and a media signal transceiving method according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

<Description of Fig. 1>

1 is a block diagram illustrating an embodiment of a configuration of a media signal transmission / reception system, and the transmission / reception system may include a transmission device 100 and a reception device 200.

Referring to FIG. 1, the transmission apparatus 100 receives a media signal from an airwave, a cable, or an external device, converts the received media signal into data in a wireless transmission format, and wirelessly transmits the media signal.

The reception device 200 may receive a media signal wirelessly transmitted from the transmission device 100, and display an image based on an image signal included in the received media signal on a screen.

The transmitting device 100 includes a high-definition multimedia interface (HDMI) terminal, a universal serial bus (USB) terminal, a component terminal, an external input terminal, and an RGB to which an external device for outputting an antenna or a media signal is connected. Various input terminals, such as a terminal and an antenna cable terminal, can be provided. The transmitter 100 may receive a media signal using an antenna or the input terminals.

In the present embodiment, the media signal may be a broadcast signal that the transmitting device 100 receives using an antenna or a cable. Also, it may be an external device output signal input using the input terminals. In addition, the transmitting apparatus 100 may be a set-top box (STB) for receiving a media signal using a wired or wireless network, converting the received media signal, and wirelessly transmitting the received media signal to the receiving apparatus 200. .

In addition, in the present embodiment, the transmitting device 100 may include all kinds of devices capable of receiving a media signal transmitted from the outside and wirelessly transmitting it to the receiving device 200. For example, the transmitting device 100 according to the present invention may be implemented in a portable terminal such as a computer or a mobile phone.

The reception device 200 may receive a wireless signal transmitted by the transmission device 100 and display an image based on the video signal included in the received signal on a screen. The receiving device 200 may convert an image signal included in a media signal wirelessly transmitted from the transmitting device 100 into a format that can be displayed on the display unit and convert the image signal into a display unit. In addition, the sound based on the voice signal included in the received signal can be output to the speaker.

According to an embodiment of the present invention, the transmitting device 100 and the receiving device 200 may be connected to various wireless communication standards, for example, wireless HD (WiHD), wireless home digital interface (WHDi), or wireless LAN (WiFi). Media signals may be transmitted and received using communication standards.

The WiHD uses a frequency band of about 60 GHz, and transmits and receives data at a transmission rate of about 4 Gbps, so that the HD video signal of 1080p (1920 × 1080) can be transmitted without compression. However, since WiHD uses a high frequency of 60 GHz band, the data transmission and reception distance is about 10 m, and the transmission and reception quality can be easily affected by the obstacles around the installation space.

The WHDi may transmit and receive data at a transmission rate of about 1.8 Gbps using a frequency band of about 5 GHz. In addition, since the WHDi uses a relatively low frequency band of 5 GHz, the transmission / reception distance is about 30 m, and the transmission / reception quality may not be greatly influenced by peripheral obstacles in the installation space. On the other hand, when the HD video signal of 1080p (1920 x 1080) is to be transmitted at a transmission speed of about 1.8 Gbps, the transmitting device 100 needs to compress the HD video signal or adjust the resolution of the video to transmit the video signal. have.

In addition, the WiFi may transmit and receive data at a transmission rate of about 54 Mbps using a frequency band of 2.4 GHz. Since the WiFi uses a low frequency band of 2.4 GHz, the transmission and reception distance is about 50 to 200 m, and the transmission and reception quality may be hardly affected by obstacles around the installation space. On the other hand, if you want to transmit a 1080p (1920 × 1080) HD video signal at a low transmission rate of about 54Mbps. The transmission device 100 needs to compress the HD video signal or adjust the resolution of the video for transmission. In this case, image quality degradation of an image included in the image signal received by the reception apparatus 200 may occur.

Meanwhile, in addition to the wireless communication standard as described above, the transmitter 100 and the receiver 200 may use various short-range wireless communication standards such as Bluetooth, ZigBee, or binary binary code division multiple access (CDMA). It is possible to transmit and receive media signals wirelessly using communication standards such as).

<Description of Fig. 2>

2 is a block diagram showing the configuration of the transmitting apparatus 100 and the receiving apparatus 200 according to an embodiment of the present invention. The transmitting device 100 may include a media box 110 and a wireless communication unit 120. The media box 110 may include a signal processor 111, a scaler 112, and a controller 113. The reception device 200 may include a wireless communication unit 210, a display unit 220, and a signal processor 230. The signal processor 220 of the receiver 200 may include a resolution determiner 231 and a scaler 232.

The media box 110 may receive various types of external media signals. The signal received by the media box 100 may be converted into a form suitable for wireless communication and transmitted to the receiving device 200 through the wireless communication unit 120. The media box 100 may determine a signal transmission state using a wireless network, and adjust the resolution of an image based on an image signal included in a transmitted media signal when the signal transmission state is less than or equal to a reference value. In the present embodiment, when adjusting the resolution, the media box 100 may adjust the resolution to correspond to the resolution of the image that can be processed by the receiving apparatus 200.

The signal processor 111 included in the media box 110 may perform a function such as demodulation, demultiplexing, or decoding of a media signal input through an antenna, a cable, or an input terminal. For example, when the broadcast signal is input to the media box 100, the signal processor 111 may demodulate the broadcast signal and demultiplex the video signal, the audio signal, and the data signal. In addition, the signal processor 111 may decode the demultiplexed video signal according to a predetermined coding scheme. For example, when the video signal included in the media signal input to the media box 110 is a video signal encoded by an MPEG coding scheme, the signal processor 111 may convert the input video signal according to the MPEG pack scheme. After decoding, it may be output to the wireless communication unit 120.

The scaler 112 may perform a function of adjusting the resolution of an image based on the image signal output from the signal processor 111. In the present embodiment, when the signal transmission state of the wireless network is less than or equal to the reference value, the media box 110 may lower the resolution of an image based on the image signal included in the media signal.

The controller 113 may wirelessly transmit the media signal to the receiving device 200 through the wireless communication unit 120. In addition, the controller 113 may receive a response signal transmitted by the reception apparatus 200 that has received the media signal through the wireless communication unit 120. The controller 113 may determine a signal transmission state of the wireless network based on the response signal transmitted by the reception device 200. When the controller 113 determines that the signal transmission state of the wireless network is less than or equal to the reference value, the controller 113 controls the scaler 112 to adjust the resolution of the image based on the image signal included in the media signal output from the media box 110. can do.

In the present embodiment, the transmitting device 100 may transmit a media signal including a video signal whose resolution is adjusted to correspond to the resolution of an image that can be processed by the receiving device 200 to the receiving device 200. The control unit 113 of the media box 110 may determine the resolution of an image that may be processed by the receiving device 200 from a transmission signal of the receiving device 200 received through the wireless communication unit 120. The controller 113 may control the scaler 112 to adjust the resolution of the image corresponding to the resolution of the receiving device 200. The media signal including the video signal constituting the image whose resolution is adjusted through the scaler 112 may be transmitted to the receiving device 200 through the wireless communication unit 120.

In the present embodiment, the control unit 113 may measure the sensitivity of the media signal received by the receiving device 200 using the signal transmitted by the receiving device 200. For example, the controller 113 may measure the received signal strength (RSSI), the packet error rate (PER) or the sound noise ratio (SNR) of the media signal received by the receiving apparatus 200. . When the controller 113 determines that the reception sensitivity is equal to or less than the reference value, the controller 113 controls the scaler 112 to adjust the resolution of the image based on the image signal included in the transmitted media signal.

The reception device 200 may include a wireless communication unit 210 for receiving a signal transmitted from the transmission device 100 and a display unit for displaying an image based on an image signal included in a media signal received by the wireless communication unit 210 on a screen ( And a signal processor 230 for processing the image signal received by the wireless communication unit 210 and outputting the image signal to the display unit 220.

The wireless communication unit 210 may receive a media signal transmitted from the transmission device 100, and transmit a response signal corresponding thereto to the transmission device 100. The signal processor 230 may control the wireless communicator 211 to transmit information about a resolution of an image that may be processed by the display 220 to the transmitting apparatus 100.

In addition, the signal processor 230 may include a resolution determiner 231 and a scaler 232 that determine a resolution of an image based on the image signal included in the media signal received through the wireless communication unit 210. The scaler 231 may adjust the resolution when the resolution of the image based on the image signal included in the media signal is not suitable for the display unit 220.

When the sensitivity of the signal received through the wireless communication unit 210 is less than or equal to the reference value, the signal processor 230 transmits the information about the resolution of the image that can be processed by the display unit 220 to the transmitting device 100. 210 can be controlled. The resolution of an image that may be processed by the display unit 220 may be a resolution of a panel on which an image is displayed or a resolution of an image that may be processed by a video processor that outputs an image signal to the display unit 220.

When the resolution of the image based on the image signal included in the received media signal is suitable for the display unit 220, the signal processor 230 sends the received image signal to the display unit 220 without adjusting the resolution. I can pass it. If the resolution of an image based on the image signal included in the received media signal is not suitable for the display unit 220, the display unit 220 displays an image signal constituting the image whose resolution is adjusted through the scaler 232. Can be printed as

<Description of Fig. 3>

3 is a flowchart illustrating a media signal transmission in the transmission apparatus 100 according to an embodiment of the present invention.

When the media signal including the video signal is input to the media box 110, the signal processor 111 may demultiplex the media signal to extract the video signal (S110).

The controller 113 may determine a signal transmission state of the wireless network (S120 to S140). That is, the response signal transmitted by the reception apparatus 200 in response to the media signal transmitted by the transmission apparatus 100 may be received through the wireless communication unit 120 (S120). The controller 113 may monitor the signal transmission state of the wireless network based on the signal received through the wireless communication unit 120 (S130). The controller 130 may determine whether the signal transmission state of the current wireless network is less than or equal to the reference value based on the monitored signal transmission state (S140).

If the signal transmission state of the wireless network is not less than the reference value, the controller 113 may bypass the extracted video signal to the wireless communication unit 120 (S150). In this case, the video signal extracted by the signal processor 111 is bypassed to the wireless communication unit 120. Meanwhile, when the signal transmission state of the wireless network is less than or equal to the reference value, the controller 113 may adjust the resolution of the image based on the extracted image signal through the scaler 112 (S160). The scaler 112 may adjust the resolution to correspond to the resolution of the image that can be processed by the receiving device 200.

The media signal including the video signal bypassed by the signal processor 111 or the video signal constituting the image whose resolution is adjusted through the scaler 112 may be transmitted to the receiving apparatus 100 through the wireless communication unit 120. There is (S170).

<Description of Fig. 4>

4 is a flowchart referred to for describing an operation control method of a receiving apparatus that receives a media signal according to an embodiment of the present invention.

As shown, the media signal transmitted by the transmitting device 100 may be received through the wireless communication unit 210 of the receiving device 200. The resolution determining unit 231 may determine whether the resolution of the image based on the image signal included in the media signal received through the wireless communication unit 210 is the resolution of the image that can be displayed on the display 230. There is (S220).

When the resolution determining unit 231 determines that the resolution of the image based on the image signal included in the media signal received through the wireless communication unit 210 is not the resolution of the image that can be displayed on the display 230, The resolution may be adjusted through the scaler 232. The scaler 232 may adjust the resolution of the image based on the input image signal so as to suit the resolution of the panel constituting the display unit 220 (S230).

The signal processor 230 may configure an image frame using an image signal included in the received media signal or an image signal constituting an image whose resolution is adjusted through the scaler 232, and output the image frame to the display unit 220. (S240). The display 220 may display an image based on the image signal output from the signal processor 230 on the screen.

<Description of Fig. 5>

5 is a diagram illustrating a resolution of an image signal included in a media signal transmitted by the transmitting device 100 according to an embodiment of the present invention. As shown in the drawing, when the signal transmission state of the wireless network decreases below the reference value, the transmitter 100 may decrease the resolution of an image having a resolution of 1080p. In this case, the resolution of the image reduced by the transmitting apparatus 100 may be the resolution of the image that can be processed by the receiving apparatus 200.

In the present embodiment, the media box 110 of the transmitting apparatus 100 may reduce the resolution of the original image having the resolution of 1080p to 720p or 480p. If it is determined that the signal transmission state of the wireless network is not very good, the transmitting device 100 may stop transmitting the media signal.

The reception apparatus 200 that has received the media signal transmitted by the transmission apparatus 100 before displaying the image corresponding to the image signal included in the media signal on the display 220, the image based on the received image signal. Can determine the resolution. If the resolution of the image corresponding to the image signal included in the media signal transmitted by the transmitting apparatus 100 is not the resolution of the image that can be processed by the display unit 220, the receiving apparatus 200 adjusts the resolution of the image. I can regulate it.

The media signal transceiving system and transceiving method according to the present invention is not limited to the configuration and method of the embodiments described as described above, but the embodiments are all or part of each embodiment so that various modifications can be made. May be optionally combined.

Meanwhile, the present invention can be embodied as processor readable codes on a processor readable recording medium included in the image display device. The processor-readable recording medium includes all kinds of recording devices that store data that can be read by the processor. Examples of the processor-readable recording medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like, and also include a carrier wave such as transmission through the Internet. The processor-readable recording medium can also be distributed over network coupled computer systems so that the processor-readable code is stored and executed in a distributed fashion.

In addition, while the preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the specific embodiments described above, but the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

100 transmission device 110 media box
120: wireless communication unit 200: receiving device
210: receiving unit 220: display unit

Claims (6)

In a media signal transmission method of a transmitter for transmitting a media signal to a receiver using a wireless network,
Determining a signal transmission state of the wireless network;
Determining a resolution of an image that can be processed by the receiving device;
Adjusting the resolution of an image included in the media signal when the determined signal transmission state is equal to or less than a reference value; And
Transmitting a media signal including an image signal constituting the image having the adjusted resolution;
And the resolution adjusting step adjusts the resolution of the image to correspond to the determined resolution of the receiving device. In the method of receiving a media signal of a receiving apparatus for receiving a media signal transmitted by a transmitting apparatus using a wireless network,
Determining a signal transmission state of the wireless network;
Transmitting information about a resolution of an image that can be processed when the signal transmission state is equal to or less than a reference value to the transmitting device;
Receiving a media signal transmitted by the transmitting device; And
Displaying an image based on an image signal included in the media signal,
And the transmitting apparatus adjusts the resolution of an image based on the image signal included in the media signal according to the information about the resolution transmitted by the receiving apparatus. A media signal transmission / reception method of a transmission device for transmitting a media signal to a reception device capable of displaying an image based on a video signal included in a media signal received using a wireless network, the method comprising:
Determining, by the transmitting apparatus, a signal transmission state of the wireless network;
Determining, by the transmitting device, a resolution of an image that can be processed by the receiving device;
Adjusting the resolution of an image based on an image signal included in a media signal when the determined signal transmission state is equal to or less than a reference value;
Transmitting, by the transmitting apparatus, a media signal including an image signal constituting the image whose resolution is adjusted to the receiving apparatus; And
The receiving device receiving a media signal transmitted by the transmitting device;
And the transmitting apparatus adjusts the resolution of an image based on the image signal included in the media signal to correspond to the determined resolution of the receiving apparatus. A transmitting device for transmitting a media signal to a receiving device using a wireless network,
A wireless communication unit which transmits a media signal to the receiving device and receives a response signal transmitted by the receiving device in response to the transmitted media signal; And
Determine a signal transmission state of the wireless network based on the response signal, determine a resolution of an image that can be processed by the receiving device, and include an image signal included in the media signal when the determined signal transmission state is equal to or less than a reference value; And a media box for controlling the wireless communication unit to adjust a resolution of an image based on the control unit and to transmit a media signal including an image signal constituting the adjusted image to the receiving device.
And the media box adjusts the resolution of the image to correspond to the determined resolution of the receiver when the resolution of the image is adjusted. A receiving apparatus for receiving a media signal transmitted by a transmitting apparatus using a wireless network,
A wireless communication unit which receives a media signal transmitted by the transmitting apparatus through the wireless network;
A display unit which displays an image based on an image signal included in the media signal received through the wireless communication unit; And
Determine a signal transmission state of the wireless network based on the received media signal; It includes a signal processing unit for controlling the communication unit,
And the transmitting apparatus adjusts the resolution of an image based on the image signal included in the media signal according to the information about the resolution transmitted by the receiving apparatus. A media signal transmitting and receiving system comprising a receiving apparatus capable of displaying an image based on an image signal included in a media signal received using a wireless network, and a transmitting apparatus transmitting a media signal to the receiving apparatus.
The transmission apparatus determines a signal transmission state of the wireless network,
Determine a resolution of an image that the transmitting apparatus can process in the receiving apparatus,
The transmitter adjusts the resolution of an image based on the image signal included in the media signal according to the determined signal transmission state;
The media device transmits a media signal including a video signal constituting an image of which the resolution is adjusted, to the receiver;
Wherein the receiving device receives a media signal transmitted by the transmitting device,
And the transmitting apparatus adjusts the resolution of an image based on the image signal included in the media signal so as to correspond to the resolution of the determined receiving apparatus.

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