KR100479392B1 - Apparatus for interfacing data - Google Patents

Abstract

The optical signals received from the source device are interfaced to accurately restore 8-bit parallel data.

The optical signal receiver receives the optical signal transmitted from the source device through the optical fiber, the clock generator generates a clock signal of a predetermined frequency, and the serial / parallel converter converts the serial data of the optical signal received by the optical signal receiver into 10-bit parallel. Converts data into 10 bits and outputs 10-bit parallel data according to the first clock signal obtained by dividing the clock signal input from the clock generator and the second clock signal in which the phase of the first clock signal is inverted, and serial / parallel conversion 10-bit / 20-bit interface unit converts 10-bit parallel data output additionally to 20-bit parallel data, and divides 10-bit parallel data from 10-bit / 20-bit interface unit into 10-bit / 8-bit decoder And 10-bit / 8-bit decoding the two 10-bit parallel data.

Description

Data interface device {Apparatus for interfacing data}

According to the present invention, a display device such as a digital television receiver receives serial data such as a video signal, an audio signal, and a control signal, which a predetermined source device such as a set top box transmits as an optical signal through an optical fiber. The present invention relates to a data interface device for interfacing a serial data into an original video signal, an audio signal, a control signal, and the like.

With the development of electronic technology, many flat panel display (FPD) devices have been developed. In display devices such as television receivers and monitors, display screens displaying predetermined images are bulky and thin and light instead of heavy cathode ray tubes. Increasingly, flat panel display elements are adopted.

A flat panel display element is divided into the element using an inorganic substance, and the element using an organic substance based on the substance used. Examples of devices using inorganic materials include plasma display panels (PDPs) using PL (photo luminescence) and field emission display (FED) devices using cathode luminescence (CL), and organic materials are used. Examples of the device include a liquid crystal display element (LCD), an organic EL display element, and the like, which are widely used in various fields.

Among these flat panel display elements, PDP has high brightness and high luminescence efficiency, wide viewing angle, can be manufactured at a relatively low manufacturing price compared to other flat panel display elements, and has excellent heat and cold resistance and earthquake resistance characteristics. Because of the advantages of easy implementation of full color and light weight, PDP has been widely adopted as a display screen in display devices such as television receivers and monitors with the advent of large PDPs. In addition, since the display device adopting the PDP as the display screen is light in weight and thin in thickness, it is being developed as a wall-mount type.

As such, in order to input a video signal and an audio signal output from a source device such as a set top box to a display device employing a PDP, the display device outputs video and audio. Are connected to each other with a predetermined cable so that the video and audio signals of the source device are transmitted to the display device via the cable, and the display device and the source device transmit the predetermined control signal to each other through the cable. have.

1 is a diagram illustrating a connection relationship between a conventional display device and a source device as an example. Here, reference numeral 100 denotes, for example, a wall-mounted display device such as a wall-mounted monitor or wall-mounted television receiver using a PDP as a display screen.

Reference numeral 110 denotes a digital apparatus such as a digital VTR (Video Tape Recorder) or a DVD (Digital Video Disc) player that reproduces a predetermined playback medium and outputs a transport packet stream of a digital video signal and an audio signal. Reference numeral 120 is an analog device such as a VTR or computer system that reproduces a playback medium such as a video tape and outputs an analog video signal and an analog audio signal.

Reference numeral 130 receives a digital broadcast signal, selectively receives a transmission packet stream output from the digital device 110 and analog video and audio signals output from the analog device 120, and selectively switches the converted signal. A source device such as a set top box to transmit to the display device 100.

In the conventional apparatus having such a configuration, the plurality of digital devices 110 and the source device 130 are connected by, for example, an IEEE 1394 cable or the like, and the digital device 110 reproduces a predetermined playback medium or the like. A signal and an audio signal are output as a transmission packet stream, and the output predetermined transmission packet stream is transmitted to the source device 130 through an IEEE 1394 cable or the like.

In addition, the analog device 120 and the source device 130 are connected by a coaxial cable. The analog device 120 reproduces a predetermined playback medium and outputs an analog video signal or an analog R, G, B signal, and an analog audio signal. The generated analog video signal or the analog R, G, and B signals and the analog audio signal are transmitted to the source device 130 through a coaxial cable.

The source device 130 receives a digital broadcast signal through an ATSC (Advanced Television Systems Committee) tuner or the like, transmits a packet packet stream of the received digital broadcast signal, and a transmission packet input from the digital device 110. Converts the stream into analog video signals and analog audio signals, selectively converts the converted analog video signals and analog audio signals, and analog video signals and audio signals input from the analog device 120 according to a user's selection And transmit it to the display device 130.

Here, the source device 130 transmits the analog R, G, B signals and the audio signals of the L and R channels to the display device 100 through the respective cables or through the dedicated integrated cable, the analog R, G, The B signal and the analog audio signals of the L channel and the R channel are transmitted to the display device 100.

In addition, a separate control / response cable is connected between the display device 100 and the source device 130, and a predetermined control signal and a response signal according to the control signal are transmitted to each other through the control / response cable. have.

However, since the display device 100 and the source device 130 are connected by a predetermined cable, the above-described conventional technology is installed when the display device 100 is mounted on a wall as a wall type and the source device 130 is installed on a shelf or the like. A cable for transmitting analog R, G, B signals and an analog audio signal, a cable for transmitting control signals and response signals, etc. are exposed to a wall exposed between the display device 100 and the source device 130. The exposed cable is thick and does not look good.

Therefore, in Patent Application No. 2002-5941, filed by the present applicant, the display device and the source device are connected with an optical fiber that is hardly discernible from a distance because of a thin thickness, and the source device is a video signal, an audio signal, a control signal, an image. Signal characteristics, voice signal characteristics, and the like are transmitted as optical signals to the display device through the optical fiber, and the display devices receive and process the optical signals.

In order for the source device to transmit a video signal, an audio signal, a control signal, an image signal characteristic, and an audio signal characteristic to the display device as an optical signal through an optical fiber, 8-bit data is converted into 10-bit data so as to be suitable for transmission of the optical signal. In addition, since the optical signal cannot be transmitted in parallel data, the optical signal must be converted into serial data in a predetermined format and transmitted.

Therefore, the source device selects and encodes the video signal, the audio signal, the control signal, the video signal characteristic and the audio signal characteristic in the order of a predetermined format, converts 8-bit parallel data into 10-bit data, and encodes the 10-bit data. After converting the parallel data of the serial data to the optical signal is transmitted through the optical fiber.

2 is a diagram illustrating a format structure of serial data in which a source device transmits a video signal, an audio signal, a control signal, a video signal characteristic, and an audio signal characteristic to a display device as a packet. Here, reference numeral 200 denotes a video signal packet having the largest data capacity. Each of the video signal packets 200 includes a video signal of one horizontal line, and in front of the video signal, the blanking header is provided when the video signal is a blanking section, and the video signal is active. Active header is provided, and the tail is continuously provided after the video signal.

The audio signal packet 202, the control signal packet 204, the video signal characteristic packet 206, and the audio signal characteristic packet 208 each having a header and a tail before and after each of the video signal packets 200 are provided. To be located. Here, the arrangement order of the audio signal packet 202, the control signal packet 204, the video signal characteristic packet 206 and the audio signal characteristic packet 208 may be changed.

The serial data of this format is encoded so that 8-bit data is converted into 10-bit data suitable for the transmission of the optical signal, and is modulated by the optical signal transmitter into the optical signal and then transmitted to the display device 100 through the optical fiber.

Therefore, the display device must convert serial data received as an optical signal from the source device into 10-bit parallel data, decode the 10-bit parallel data, and accurately convert it to 8-bit parallel data.

It is therefore an object of the present invention to provide a data interface device for interfacing an optical signal received from a source device with 8 bits of parallel data accurately.

In the data interface apparatus of the present invention having the above object, the optical signal receiving unit receives an optical signal transmitted from an optical device through an optical fiber, the clock generating unit generates a clock signal of a predetermined frequency, and the optical signal receiving unit receives the optical signal. The serial / parallel converter converts the serial data of the signal into 10-bit parallel data, and converts the clock signal inputted from the clock generator into the first clock signal divided by two and the second clock signal inverted phase of the first clock signal. Outputting the 10-bit parallel data, the 10-bit / 20-bit interface unit converts the 10-bit parallel data output by the serial / parallel conversion unit into 20-bit parallel data, and 20 from the 10-bit / 20-bit interface unit. 10-bit / 8-bit decoder receives bit-parallel data, divides it by 10-bit, and divides the two 10-bit parallel data into 10-bit / 8-bit Characterized in that the coding.

Hereinafter, a data interface device of the present invention will be described in detail with reference to the accompanying drawings of FIG. 3.

3 is a block diagram showing a data interface device of the present invention. As shown in the drawing, an optical signal receiver 300 for receiving an optical signal transmitted by a source device through an optical fiber, a clock generator 310 for generating a clock signal, and the optical signal receiver 300 received Converting the serial data of the optical signal into 10-bit parallel data and inverting the phase of the first clock signal CLK1 and the first clock signal CLK1 divided by two by dividing the clock signal received from the clock generator 310. 20-bit parallel data of the serial / parallel converter 320 for outputting the 10-bit parallel data according to the second clock signal CLK2 and the 10-bit parallel data output from the serial / parallel converter 320. 10-bit / 20-bit interface unit 330 for converting the data into 20-bit parallel data received from the 10-bit / 20-bit interface unit 330, divided into 10 bits, and the two 10-bit parallel data are simultaneously 10-bit. 10 bits / 8 bits for decoding 8 bits The decoder 340 was configured.

In the data interface device of the present invention configured as described above, the clock generator 310 generates a clock signal having a predetermined frequency and supplies the clock signal to the serial / parallel converter 320 and the 10-bit / 20-bit interface 330.

The optical signal receiver 300 receives and outputs an optical signal transmitted from the source device through the optical fiber. For example, the source device transmits serial data of a predetermined format through an optical fiber at a speed of 1.26 Gbps, and the optical signal receiver 300 receives an optical signal having a speed of 1.26 Gbps at the serial / parallel converter. Output to 320.

The serial / parallel converter 320 divides a clock signal input from the clock generator 310 into, for example, two clock signals having a frequency of 125 MHz and divides the first clock signal CLK1 having a frequency of 62.5 MHz. ) And a second clock signal CLK2 having the same frequency as the first clock signal CLK1 and having an inverted phase, and converting serial data received from the optical signal receiver 300 into 10-bit parallel data. The conversion is performed at each rising edge of the first clock signal CLK1 and the second clock signal CLK2.

The 10-bit parallel data output by the serial / parallel converter 320 is input to the 10-bit / 20-bit interface unit 330 to be converted into 20-bit parallel data and received from the clock generator 310. For example, the clock signal is output according to a clock signal having a frequency of 62.5 MHz and input to the 10-bit / 8-bit decoder 340.

Then, the 10-bit / 8-bit decoder 340 divides the 20-bit parallel data received from the 10-bit / 20-bit interface unit 330 into two by 10 bits, the two divided 10-bit parallel data 10 bits and 8 bits are decoded according to one clock signal and output.

On the other hand, while the present invention has been shown and described with respect to specific preferred embodiments, various modifications and changes of the present invention without departing from the spirit or field of the invention provided by the claims below It can be easily understood by those skilled in the art.

As described in detail above, the present invention receives an optical signal input from a source device, converts the optical signal into 10-bit parallel data, decodes the 10-bit parallel data, and converts the received signal from the source device into 8-bit parallel data. It can accurately restore and output clear video and audio.

1 is a view showing a connection relationship between a conventional source device and a display device as an example,

2 is a diagram illustrating a format structure of serial data in which a source device transmits a video signal, an audio signal, a control signal, a video signal characteristic, and an audio signal characteristic to a display device as a packet.

3 is a block diagram showing the configuration of a data interface device of the present invention.

* Description of the symbols for the main parts of the drawings *

300: optical signal receiver 310: clock generator

320: serial / parallel converter 330: 10-bit / 20-bit interface

340: 10-bit / 8-bit decoder

Claims (1)

An optical signal receiver for receiving an optical signal transmitted from an optical device by a source device; A clock generator for generating a clock signal; Converting the serial data of the optical signal received by the optical signal receiver into 10-bit parallel data, and inverting the phase of the first clock signal and the first clock signal divided by two by dividing the clock signal received from the clock generator; A serial / parallel converter for outputting the 10-bit parallel data according to two clock signals; A 10-bit / 20-bit interface unit for outputting 10-bit parallel data output by the serial / parallel conversion unit as parallel data by 20 bits in synchronization with the first clock signal; And 10 bits / 8 bits for receiving 20 bits of parallel data output by the 10 bits / 20 bits interface unit according to the first clock signal, dividing the data into 10 bits and decoding the two 10 bits of parallel data into 8 bits of parallel data. Data interface device consisting of a decoder.