KR100850715B1 - Audio/Video system and method for controlling resolution - Google Patents

Abstract

Disclosed are an AV system and an AV signal control method for reproducing a best voice format by automatically changing a resolution of a video player in accordance with a DTV in an AV system processing a signal input through an HDMI (High Difinition Multimedia Interface). The present invention relates to a method of controlling an audio / video signal of an audio / video receiver in an audio / video system connected by wired or wireless connection between a DVD player, an audio / video receiver, and a display device. The process of detecting the resolution by referring to the EDID information of the display device, extracting the resolution and channel information of the DVD audio title played by the DVD player, and resolving the resolution and channel information of the DVD audio title. Changing the resolution of the DVD player within the detected resolution range of the display device.

Description

AV system and method for controlling AV signal {Audio / Video system and method for controlling resolution}

1 is a block diagram of an AV system according to the present invention.

2 is a conceptual diagram of processing EDID information in the AV receiver 120 of FIG. 1.

3 is a flowchart illustrating a method of performing AV control in the AV receiver 120 of the AV system according to the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an AV system, and more particularly, to an AV system that processes a signal input through a High Difinition Multimedia Interface (HDMI), and to an AV system for reproducing the best voice format by automatically changing the resolution of a video player to match a DTV. An AV signal control method.

In general, HDMI (High Definition Multimedia Interface) is an interface of a digital AV device capable of transmitting both video and audio signals.

HDMI is a standard that can simultaneously transmit video and audio data that exceeds the quality and sound quality of high-definition digital TVs.

In addition, HDMI transmits signals at 5GB / sec. With one terminal and low data loss rate, resulting in high image and high sound quality. It can support up to 1080p video resolution and up to 8 audio channels (192kHz).

Therefore, the DVD player, AV receiver and DTV are connected to each other with an HDMI cable to form an AV system. The DVD player plays back video and audio signals. The AV receiver plays the audio signal output from the DVD player to the speaker through the audio DSP, DAC and amplifier. The DTV displays a video signal output from the DVD player on the screen.

When audio is output from the DVD player to the AV receiver via an HDMI cable, the general CD is output to the PCM, and in the case of DVD, the DVD-audio is output to the Multi PCM as LPCM or compressed data. DVD-Audio is a disc that is filled with only a minimum of video to ensure high sound quality with up to 9 gigabytes of disk space. In addition to high-quality signals, DVD-Audio can insert about 20 still images per audio track through MPEG-1 / 2 Intra Picture Coding.

 In the case of such DVD-audio, only the analog output is output from the DVD player, and the digital output is available in some DVD players supporting IEEE 1384. However, as DVD players that support DVD audio in HDMI version 1.1 and DVD players equipped with HDMI version 1.1 have been expanded, DVD players supporting multi-PCM with HDMI have been expanded.

 During DVD-Audio playback of DVD titles of the DVD player, audio signals are output in various ways depending on the resolution setting of the DVD player and the DVD player. For example, in the case of DVD-audio (speech data is fs = 96KHz, 5.1Ch), the DVD player can output audio signals with two audio channels and 5.1 channel. When playing a multi-PCM fs = 96KHz, 5.1 channel source, the user wants to listen to 5.1 channel sound, but if the setting value is not properly set, there is a problem of listening to 2 channels.

Therefore, there is a problem that the voice output from the speaker of the AV receiver and the image displayed on the DVD player often do not match.

The present invention provides an AV system and an AV signal for reproducing the best voice format by automatically changing the resolution of a video player for a DTV in an AV system that processes a signal input through a High Difinition Multimedia Interface (HDMI). To provide a control method.

In order to solve the above technical problem, the present invention provides a method for controlling an audio / video signal of the audio / video receiver in an audio / video system connected wired or wirelessly between a DVD player, an audio / video receiver, and a display device.

Determining a DVD-audio title by analyzing a signal reproduced by the DVD player;

If it is determined that the DVD-audio title is detected, referring to the EDID information of the display device;

Extracting resolution and channel information of a DVD audio title played in the DVD player;

And changing the resolution of the DVD player within the detected resolution range of the display device according to the resolution and channel information of the DVD audio title.

In order to solve the above other technical problem, the present invention provides a DVD player for generating an audio / video signal from a DVD-Audio title;

An AV receiver for amplifying an audio signal input from the DVD device and outputting an input video signal to a display device;

A DTV device displaying a video signal generated from the AV receiver,

The AV receiver

An HDMI receiver for receiving a video / audio signal from the DVD player via HDMI;

An HDMI transmitter for outputting a video signal to the DTV device through the HDMI;

And a control unit which reads EDID information from the DTV device, extracts a resolution value, and changes the resolution of the DVD player within the resolution range detected by the DTV according to the resolution and channel information of the DVD audio title. do.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a block diagram of an AV system according to the present invention.

The AV system of FIG. 1 includes a DVD player 110, an AV receiver 120, and a DTV 130. The DVD player 110, the AV receiver 120, and the DTV 130 are connected to each other with an HDMI cable.

The DVD player 110 includes a video / audio source unit 111, an HDMI transmitter 113, and a controller 115. The video / audio source unit 111 reproduces the video / audio signal recorded on the disc recording medium such as DVD, CD, DVD Audio, etc. in accordance with the reproduction control signal of the control unit 115. The HDMI transmitter 113 outputs a video / audio signal from the video / audio source unit 111 to the AV receiver 120 through a high definition multimedia interface (HDMI). The control unit 110 applies a reproduction control signal to the video / audio source unit 111, decodes a header from the data demodulated by the video / audio source unit 111, extracts image resolution and audio channel information, and reproduces. EDID information or video resolution and audio channel information are exchanged with the HDMI transmitter 113 and the AV receiver 120 through the DDC (Digital Display Channel) protocol played on a DVD-Audio disc.

The AV receiver 120 includes an HDMI receiver 121, an HDMI transmitter 124, an EEPROM unit 122, a controller 123, a DSP unit 125, and a DAC 126. The HDMI receiver 121 receives a video / audio signal or an image resolution and audio channel information from the DVD player 110 through HDMI. The HDMI transmitter 124 outputs a video / audio signal to the DTV 130 through HDMI. The EEPROM unit 122 stores EDID (Extended Display Identification) information. EDID contains display information such as header, manufacturer identification code, product identification code, date of manufacture, EDID structure version, basic display variables and maximum resolution, color characteristics, timing information, and check-sum bytes for error detection. The present invention may include audio channel information and video resolution information as shown in FIG. 2. The controller 123 reads the EDID information from the DTV 130 and stores the EDID information in the EEPROM 122. In particular, the controller 123 analyzes the EDID information read from the DTV 130 through the DDC protocol to determine the resolution. To change the resolution. The digital signal processor (DSP) unit 125 extracts and decodes only audio data from the HDMI transmitter 124. The digital analog converter (DAC) unit 126 converts audio data of a plurality of channels decoded by the DSP unit 125 into an analog audio signal and outputs the analog audio signal to 1-8 speakers 127.

The DTV 130 includes an HDMI receiver 121, a display 132, an EEPROM unit 133, and a controller 134. The HDMI receiver 131 receives a video / audio signal from the AV receiver 120 through HDMI and outputs only the video signal to the display unit 132. The EEPROM unit 122 stores EDID (Extended Display Identification) information. The display unit 132 displays a video signal output from the HDMI receiver 131 on the screen. The controller 134 reads EDID information stored in the EEPROM 133.

2 is a conceptual diagram of processing EDID information in the AV receiver 120 of FIG. 1.

The AV receiver 120 reads the EDID information of the DTV 130, adds the information of the AV receiver, and stores the EDID data in the EEPROM 122. The EDID information includes channel information of the audio mode, resolution information of the video mode, and the like. For example, EDID information of the EEPROM 122 of the AV receiver stores EDID information (audio channel information, video resolution information) of the DTV and information (audio channel information and resolution information) of the AV receiver itself.

3 is a flowchart illustrating a method of performing AV control in the AV receiver 120 of the AV system according to the present invention.

First, when the DVD is played, it is checked whether the disc is a DVD-audio title (step 310).

Subsequently, in the case of a DVD-audio title, EDID information of the DTV 130 is read (step 320).

Next, the EDID information is checked to determine whether the DTV 130 supports 720p (progressive) or 1080i (interlace) (step 322).

Subsequently, it checks whether the current resolution is 720p (progressive) or 1080i (interlace) by checking EDID information in itself (step 324).

Subsequently, if the current resolution is not 720p (progressive) or 1080i (interlace), the current resolution of the AV receiver 120 is backed up (step 330).

Subsequently, the resolution information of the decoded video signal is read from the DVD player 110 into the header portion of the signal reproduced in the DVD-audio title (step 340).

Next, it is checked whether the resolution of the DVD video signal is 720p (progressive) or 1080i (interlace) (step 342).

Subsequently, if the resolution of the DVD video signal is not 720p (progressive) or 1080i (interlace), the resolution information of the EDID is modified to 720p (progressive) or 1080i (interlace) (step 350).

Subsequently, audio channel information of the decoded DVD-audio title is checked as a header portion of the signal reproduced by the DVD player 110 (step 352). At this time, if the audio channel is 5.1, the preset resolution is reproduced at 720p (progressive) or 1080i (interlace).

Subsequently, if the audio channel is 2 channels, the current resolution, that is, the resolution value backed up in step 340 is loaded (step 360).

Subsequently, the process changes to the resolution value loaded in the EDID information of the AV receiver 120 (step 370).

As a result, the AV receiver 120 interprets the signal from the DVD player 110 and changes the video resolution of the DVD player 110 in the range of possible resolutions of the DTV 130 in the case of a DVD-audio title to play in the best audio format. You can.

The present invention is not limited to the above-described embodiment, and of course, modifications may be made by those skilled in the art within the spirit of the present invention.

The present invention can also be embodied as computer readable code on a computer readable recording medium. The computer-readable recording medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, hard disk, floppy disk, flash memory, optical data storage device, and also carrier waves (for example, transmission over the Internet). It also includes the implementation in the form of. The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.

As described above, according to the present invention, in the AV receiver of an AV system that processes a signal input through HDMI (High Difinition Multimedia Interface), the DVD player is reproduced by automatically changing the resolution of the DVD player to match the DTV. The speaker and audio output of the display and AV receiver can be output in synchronization.

Claims (4)

In the audio / video signal control method of the audio / video receiver in an audio / video system connected by wired or wireless connection between the DVD player, audio / video receiver, display device, Analyzing a signal reproduced by the DVD player to determine a DVD audio title into which a still picture is inserted per audio track; If it is determined that the DVD audio title is detected, referring to EDID information of the display device, detecting the resolution; Extracting video resolution information and audio channel information from a header portion of a signal played in a DVD audio title played in the DVD player; And changing the video resolution of the DVD player within the detected resolution range of the display device according to the video resolution information and the audio channel information of the DVD audio title. The method of claim 1, wherein the changing of the video resolution of the DVD player comprises changing the resolution value in the EDID information according to the video resolution information and the audio channel information of the DVD audio title. A DVD player for generating an audio / video signal from the DVD audio title; An AV receiver for amplifying an audio signal input from the DVD player and outputting an input video signal to a display device; A DTV device displaying a video signal generated from the AV receiver, The AV receiver An HDMI receiver for receiving a video / audio signal from the DVD player via HDMI; An HDMI transmitter for outputting a video signal to the DTV device through the HDMI; Read the EDID information from the DTV device to extract the resolution value, and according to the video resolution information and audio channel information extracted from the header portion of the DVD audio title, the video resolution of the DVD player within the resolution range detected by the DTV device AV system comprising a control unit for changing the. 4. The AV system of claim 3 wherein the AV receiver further comprises an EEPROM storing EDID information including the audio channel and video resolution.

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