KR20110085606A - A display device and method of setting audio path of dvi/hdmi - Google Patents

Abstract

PURPOSE: A video display and DVI/HDMI audio setting method are provided to set an audio path by displaying a currently available OSD path. CONSTITUTION: A video display is connected to an audio and video source device through an HDMI/DVI cable(S401). The HDMI/DVI statue packet is analyzed through a connected cable(S403). If a packet analysis result audio packet is not detected, an available audio path is detected(S407). A detected available audio path is displayed on a screen as an OSD menut(S408).

Description

A display device and method of setting audio path of DVI / HDMI}

The present invention relates to a video display device and a DVI / HDMI audio setting method. More particularly, the present invention relates to a method for setting an audio path of a video display device by displaying currently available voice multiplexing information on a menu screen.

Recently, as multimedia contents are diversified, various multimedia devices for reproducing and transmitting various multimedia contents have been developed together, and thus, many simple and lossless interface technologies have been developed.

The most representative multimedia interfaces are DVI and HDMI. DVI (Digital Visual Interface) is a transmission standard established by a consortium formed by leading companies in the computer industry called DIGITAL DISPLAY WORKING GROUP to digitally connect monitors and PCs. The DVI standard has been widely applied to not only PCs and monitors but also commercial plasma displays and peripherals. Recently, HDMI standards, which are more suitable for high-definition multimedia environments, have been developed and commercialized.

HDMI is a high-speed multimedia interface that integrates and transmits uncompressed full digital audio and video signals, and can transmit all ATSC and HDTV, and devices such as audio / video sources, set-top boxes and DVD players, monitors, and digital TVs. Provides an interface between

This HDMI is simple to process 5Gbps digital video and audio without compression, simple circuit, no quality deterioration, and copyright protection of content by HDCP (High-bandwidth Digital Content Protection). It has the advantage of being easy to use with a single cable connection. In addition, it is compatible with DVI, which is mainly used in the computer industry, and its application is a multimedia interface that is being developed.

Meanwhile, the HDMI standard defines a user electronic control (CEC) and a CEC bus that can easily control a plurality of multimedia devices connected through a network. According to the CEC, individual control of multimedia devices connected through HDMI is separately performed. Since it can be simply performed on one device without the user, the user can conveniently link the devices.

HDMI, which has the advantages described above, is also generally connected to each device by wire using a cable. It defines an HDMI device as an image display device such as a transmitter or a TV as a receiver, and operates according to the HDMI / DVI according to the HDMI state setting received from the TV. If the HDMI signal is determined, connect the audio from the HDMI terminal, and if the DVI signal is determined, connect to the input audio of the Aux terminal.

The present invention is to provide an image display apparatus for setting an audio path by analyzing an HDMI status packet and displaying the currently available audio path on an OSD screen when there is no audio packet output.

Technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned above will be clearly understood by those skilled in the art from the following description. Could be.

In order to achieve the above object, a video display device for setting a DVI / HDMI audio path according to the present invention includes an HDMI / DVI receiver for receiving an HDMI / DVI status packet from an audio and video source device connected through an HDMI / DVI cable. ; A controller which analyzes the HDMI / DVI Status packet and automatically detects an available audio path when no audio packet is detected as a result of the packet analysis; And an OSD generator which generates the detected available audio path as an OSD menu and outputs the same to the screen.

The controller may set one of audio paths available on the OSD menu as audio input information.

The available audio path is characterized by comprising an Aux terminal, a Scart terminal and an AV1 / 2/3.

The audio and video source device requests extended display identification data EDID from the video display device.

The audio and video source device checks the HDMI / DVI cable connection state by detecting a hot plug signal.

It contains an EEPROM that stores Extended Display Identification Data (EDID) that represents the manufacturer or specification information, basic display variables and characteristic information of the supported resolution and color formats.

And an audio decoding unit for decoding and outputting an audio signal received through the audio path set as the audio input information.

In addition, the present invention provides a DVI / HDMI audio setting method of a video display device, comprising: connecting to an audio and video source device through an HDMI / DVI cable; Analyzing an HDMI / DVI Status packet through the connected cable; If an audio packet is not detected as a result of the packet analysis, detecting an available audio path; And displaying the detected available audio path on a screen with an OSD menu.

Setting audio input information of any one of audio paths available on the OSD menu.

The available audio path is characterized by comprising an Aux terminal, a Scart terminal and an AV1 / 2/3.

The audio and video source device requests extended display identification data EDID from the video display device.

The audio and video source device checks the HDMI / DVI cable connection state by detecting a hot plug signal.

The present invention has an effect of setting an audio path by displaying the currently available voice multi-information on an OSD screen when receiving an incorrect HDMI status information from a non-certified HDMI device.

1 is a diagram illustrating a state in which a DVI / HDMI device is connected to a video display device according to an exemplary embodiment of the present invention.
2 is a block diagram schematically illustrating a configuration of a video display device performing a DVI / HDMI audio setting function according to an exemplary embodiment of the present invention.
3A to 3C illustrate an example of HDMI state information syntax.
4 is a flowchart illustrating a method of setting DVI / HDMI audio in a video display device according to an embodiment of the present invention.
5 is an exemplary view illustrating a currently available audio path setting menu screen according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to include a certain component, it means that it may further include other components, except to exclude other components unless specifically stated otherwise. In addition, terms such as '.. part', '.. module' described in the specification means a unit for processing at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software.

1 is a diagram illustrating a state in which a DVI / HDMI device is connected to a video display device according to an exemplary embodiment of the present invention.

A DVD player 100 having an HDMI / DVI output and a digital TV 200 which is an image display device for transmitting and receiving information to each other via HDMI / DVI communication are connected to the DVD player 100 through an HDMI / DVI cable 300. do.

According to an embodiment of the present invention, in order to detect whether the HDMI cable 300 is connected between the DVD player 100 and the digital TV 200, the DVD player 100 uses a hot plug signal of a digital interface defined by HDMI. To determine if it is 'high'. When the DVD player 100 and the digital TV 200 are connected by the HDMI cable 300, the Hot Plug signal is high (5V), and when the DVD player 100 is not connected by the HDMI cable 300, the Hot Plug signal is low ( 0V). If the Hot Plug signal is 'high', the DVD player 100 obtains data format (EDID) information of the digital TV 200 through the DDC line when the HDMI cable is connected.

2 is a block diagram schematically illustrating a configuration of a video display device that performs a DVI / HDMI audio setting function according to an exemplary embodiment of the present invention.

The DVI / HDMI device 100 includes an HDMI / DVI transmitter 110 for outputting a signal, and according to an embodiment of the present invention, the HDMI / DVI transmitter 110 may transmit decoded digital video and audio data to an HDMI communication scheme. Transmit with correct signal. Transition Minimized Differential Signaling Interface (TMDS) encoding is transmitted to the video display device 200 through an HDMI cable in order to change to a format that can be transmitted in HDMI communication. When the HDMI / DVI device connects the HDMI / DVI cable 300, the data format (EDID) information for the recognition of the image display apparatus 100 is read through the DDC line, and the communication status of the DDC line and the signal status of the hot plug are read. It detects whether the HDMI / DVI cable 300 is connected to the video display device 100 and automatically sets the output port to HDMI when the HDMI cable connection is detected.

The video display device 200 connected to the DVI / HDMI device 100 may include an HDMI / DVI receiver 210, a controller 220, an EEPROM 230, an OSD generator 240, an audio decoder 250, and a speaker ( 260).

The HDMI / DVI receiver 210 receives digital video and audio signals transmitted from the HDMI / DVI transmitter 110 of the DVI / HDMI device 100 and DMDS decodes the HDMI signal converted into a format that can be transmitted in HDMI communication. .

The controller 220 checks the DVI or HDMI link state and receives the HDMI signal. At this time, the controller 220 analyzes the HDMI status packet and determines whether or not the audio packet is detected. If the audio packet is not detected by analyzing the HDMI status packet, the controller 220 checks the audio path (HDMI-> Aux-> Scart-> AV1 / 2/3) in the HDMI status setting. The controller 220 displays the currently available audio input information on the OSD menu screen to set the audio path selected by the user among the available audio input information.

The EEPROM 230 is for storing EDID data. The data format defined by the Video Electronics Standards Association (VESA), that is, Extended Display Identification Data (hereinafter referred to as EDID), refers to display characteristic information data. For example, the information may include information such as a manufacturer or a standard, basic display variable and characteristic information such as a supported resolution and color format, and the like. The EDID data is stored in the internal EEPROM 230 when the image display apparatus 200 is produced.

The OSD generator 240 converts the currently available audio path into OSD data based on the result of checking the audio path (HDMI-> Aux-> Scart-> AV1 / 2/3) in the HDMI status by the controller 220. Create

The audio decoding unit 250 receives and decodes the digital audio signal output from the HDMI / DVI receiving unit 210 through the audio path set by the controller 220 and outputs the digital audio signal to the speaker 260.

3A to 3C are diagrams showing examples of HDMI state information syntax.

The HDMI status information illustrated in FIG. 3A includes the following field values. The connenction_status field indicates which connection is present at the HDMI terminal. The host_HDCP_status field indicates whether High-bandwidth Digital Content Protection (HDCP) is enabled on the HDMI link.

The Device_HDCP_status field represents the HDCP status of the peripheral device connected to the host through the HDMI terminal. The video_format field represents the current video format used at the HDMI terminal. The vertical_lines field represents the number of vertical lines associated with the video format on the HDMI link. The scan_rate field indicates a scan rate associated with a video format on a DVI link. The aspect_ratio field represents an aspect ratio related to a video format on a DVI link. The prog_inter_type field indicates whether the scanning method on the DVI link is interlaced scanning or sequential scanning.

Further, assuming that a DVD player is connected to the current video display device through an HDMI link and transmits AVI information, ADUIO information, and MPEG information, the auxiliary_information_status field value is 010112. AVI information, ADUIO information, and MPEG information are generated by AVI_info {}, AUDIO_info {}, and MPEG_info {} syntax.

Therefore, when the auxiliary_information_status field value is parsed by the POD module and the value is 010112, AVI_info {}, AUDIO_info {}, and MPEG_info {} syntax are parsed to extract AVI information, ADUIO information, and MPEG information. That is, as shown in FIG. 3A, 0x01 is logically multiplied by an auxiliary_information _status field value, and if 1, current AVI information used on an HDMI port is generated using AVI information fields in AVI_info {} which are newly defined next. .

The newly defined AVI information field includes a version field, a color_space field, an active_format field, a bar_info field, a scan_info field, an aspect_ratio field, an active_format_aspect_ratio field, a picture_scaling field, a video_id_code field, a pixel_repetition field, and the like.

Meanwhile, as shown in FIG. 3B, when the auxiliary_information_status field value is 0x02 by a logical value of 1, audio information currently used on the HDMI terminal is generated using audio information fields in AUDIO_info {} which are newly defined.

The newly defined audio information fields include a version field, an audio_coding_type field, an audio_channel_count field, a sampling_frequency field, a sample_size field, a max_bit_rate field, a speaker_allocation field, a down_mix field, a level_shift_value field, and the like.

When the auxiliary_information_status field value of FIG. 3B and 0x04 are logically multiplied to 1, SPD (Source Product Description) information currently used on the HDMI terminal is generated using SPD information fields in SPD_info {} which are newly defined.

The newly defined SPD information fields include a version field, a source_device_info field, a vendor_name_character1 field, a vendor_name_ character8 field, a product_description_char1 field, a product_description_char16 field, and the like.

Meanwhile, if the auxiliary_information_status field value shown in FIG. 3C is 0x08 and is 1, MPEG information currently used on the HDMI terminal is generated by using MPEG information fields in MPEG_info {} which are newly defined.

The newly defined MPEG information fields include a version field, an mpeg_bit_rate0 field, an mpeg_bit_rate3 field, a field_repeat field, and an mpeg_frame field.

4 is a flowchart illustrating a DVI / HDMI audio setting method in a video display device according to an exemplary embodiment of the present invention.

The video display device is connected to the HDMI / DVI device through the HDMI / DVI cable (S401).

The HDMI / DVI device reads the data format (EDID) information for recognizing the video display device through the HDMI / DVI cable, and checks the DDC line communication status and the signal status of the hot plug to connect the HDMI cable to the video display device. If detected, the output port is automatically set to HDMI to initialize the connection (S402).

The video display device analyzes the HDMI / DVI Status packet received through the connected cable (S403).

It is determined whether the signal received through the cable is an HDMI signal (S404).

If the determination result in step S404 is HDMI Status, it is determined whether an audio packet exists in the HDMI Status (S405).

If the determination result in step S404 is DVI Status, check the presence / absence of an audio packet in DVI Status (S406).

If there is no audio packet in step S405 and step S406, respectively, an available audio path is automatically detected (S407). At this time, the Aux terminal, the Scart terminal, and the AV1 / 2/3 terminal except for the HDMI terminal are provided.

The detected available audio input information is displayed on the screen by the OSD menu (S408).

The audio path selected by the user among the available audio input information is set and connected (S409).

An audio signal is received through the connected audio terminal (S410). The received audio packet is decoded and output through the speaker (S411, S412).

5 is an exemplary view illustrating a currently available audio path setting menu screen according to an embodiment of the present invention.

When no audio packet is detected in the HDMI Status and DVI Status received through the HDMI / DVI cable, the available audio input information (Aux, Scart, AV1 / 2/3, etc.) is detected and output to the OSD menu screen. At this time, the audio path selected by the user among the available audio input information is forcibly set.

On the other hand, the terms used in the present invention (terminology) are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of the skilled person in the relevant field, the definitions of which are used throughout the present invention. It should be based on.

The present invention is not limited to the above-described embodiments and may be variously modified and changed by those skilled in the art, which are included in the spirit and scope of the present invention as defined in the appended claims.

100. HDMI / DVI device 200. Video display device
300.HDMI / DVI cable 110.HDMI / DVI transmitter
210. HDMI / DVI Receiver 220. Controller
230. EEPROM 240. OSD generator
250. Audio decoding unit 260. Speaker

Claims (12)

Connecting to an audio and video source device via an HDMI / DVI cable;
Analyzing an HDMI / DVI Status packet through the connected cable;
If an audio packet is not detected as a result of the packet analysis, detecting an available audio path; And
And displaying the detected available audio paths on a screen with an OSD menu. The method of claim 1,
And setting audio input information of any one of audio paths available on the OSD menu. The method of claim 1,
And the available audio path includes an aux terminal, a scart terminal, and an AV1 / 2/3. The method of claim 1,
And the audio and video source device requests extended display identification data (EDID) from the video display device. The method of claim 1,
And the audio and video source device detects a hot plug signal to check the HDMI / DVI cable connection state. An HDMI / DVI receiver configured to receive an HDMI / DVI Status packet from an audio and video source device connected through an HDMI / DVI cable;
A controller which analyzes the HDMI / DVI Status packet and automatically detects an available audio path when no audio packet is detected as a result of the packet analysis; And
And an OSD generator which generates the detected usable audio path as an OSD menu and outputs it to a screen. The method of claim 6,
And the control unit sets any one of audio paths available on the OSD menu as audio input information. The method of claim 6,
And the available audio path includes an Aux terminal, a Scart terminal, and an AV1 / 2/3. The method of claim 6,
And the audio and video source device requests extended display identification data (EDID) from the video display device. The method of claim 6,
And the audio and video source device detects a hot plug signal and checks the HDMI / DVI cable connection state. The method of claim 6,
A video display device that sets up a DVI / HDMI audio path that includes an EEPROM that stores extended display proof data (EDID) representing manufacturer or specification information, basic display variables and characteristic information for supported resolution and color formats. The method of claim 7, wherein
And an audio decoding unit for decoding and outputting an audio signal received through the audio path set as the audio input information.

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