KR19990050412A - High-definition video decoding device for multiple input, single output of digital multimedia system - Google Patents

Abstract

The present invention relates to a video decoding apparatus for decoding a plurality of MPEG-2 media streams in order to provide a high-definition multimedia communication service of a Moving Picture Expert Group-2 (MPEG-2) level in a digital multimedia system. Media decoding means for receiving a plurality of MPEG-2 media streams from the devices and decoding them to restore a plurality of digital video and digital audio signals, and reconstructing the reconstructed video signals according to a desired type to reconstruct them into a single video. A plurality of inputs of a digital multimedia system comprising a video processing means, an analog media output control means for converting a processed video and audio signal into an analog signal and outputting the same through a TV, and a system control means for overall control of the entire apparatus, High Definition Movie for Single Output By providing an image decoding apparatus, a plurality of high-definition decoding of an integrated form, and freely reconstructed decoded digital screens to display one digital video on one TV or computer monitor, thereby providing a media processing apparatus in various multimedia systems. In addition, there is an effect that can be widely used as a media decoding and video processing device in a multimedia communication service, digital broadcasting, a terminal of an on-demand video service, a multipoint access control device for video conferencing, and the like.

Description

High-definition video decoding device for multiple input, single output of digital multimedia system

The present invention relates to a multi-input, single-output high-definition video decoding apparatus having a plurality of MPEG-2 decoding functions to provide a high-definition multimedia communication service of moving picture expert group-2 (MPEG-2) level in a digital multimedia system. In particular, the present invention relates to an MPEG-2 class video decoding and video processing apparatus used in multimedia communication services such as video conferencing, video on demand, and digital broadcasting.

In today's advanced information society, digital multimedia is a very important and promising field. In addition, in a variety of digital multimedia systems and multimedia communication services, many digital media streams are often provided at the same time, and thus, the development of a device capable of efficiently processing them is very urgent. In particular, multi-point access unit (MCU) for video conferencing services and high-definition decoding apparatus of multiple inputs and single outputs are essential in high-performance terminal devices for on-demand multimedia and digital broadcasting services. Also, in a high-performance multimedia system, a plurality of video decoding functions are very important, and the function of reprocessing them into a single screen is essential for various expressions such as picture in picture (PIP) and split-screen on a TV screen.

However, conventional video decoding apparatuses mostly process a single stream, and even if a plurality of streams are processed, they do not have a function of reconfiguring them into a single screen and have a plurality of decoders.

In order to solve the above problems, the present invention receives a plurality of MPEG-2 TS streams, decodes them, and outputs a plurality of inputs and a single output of a digital multimedia system for reconstructing and outputting a plurality of digital video signals restored by decoding into a single screen. The purpose of the present invention is to provide a high-definition video decoding apparatus for a plurality of high-definition decoding in an integrated form, and to freely reconstruct the decoded digital screens to display one digital video on one TV or computer monitor.

1 is a block diagram of a digital multimedia system according to the present invention;

2 is an internal configuration diagram of a decoding device of FIG. 1;

3 is an internal configuration diagram of the video processing apparatus of FIG. 2;

<Explanation of symbols for main parts of drawing>

100: digital media input device 200: high-definition video decoding device

210: media input interface device 220: media decoding device

230: system control unit 240: video processing unit

241 video storage element 242 video size controller

243: video position controller 244: video merge controller

250: analog media output control device 260: host interface device

300: external host device 400: external video processing device

500: external audio processing device 600: TV monitor

700: TV Speaker

The present invention relates to a multi-input, single-output high-definition video decoding apparatus having a plurality of MPEG-2 decoding functions to provide a high-definition multimedia communication service of moving picture expert group-2 (MPEG-2) level in a digital multimedia system. Media decoding means for receiving a plurality of MPEG-2 media streams from external media stream input devices and decoding them to recover a plurality of digital video and digital audio signals, and dividing / merge the recovered video signals according to a desired type. It consists of video processing means for reconstructing one video, analog media output control means for converting processed video and audio signals into analog and outputting them through TV, and system control means for overall control of the whole device. If the device is mounted as part of another device John that the host interface means and the network device is connected to the case to be used as part of a multimedia communication service apparatus means is further configured with additional features.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

1 is a block diagram of a digital multimedia system according to the present invention, in which a digital media input apparatus 100 for inputting a media stream to be decoded and a high quality video for decoding and outputting a stream signal output from the digital media input apparatus 100 are illustrated. The decoding apparatus 200, the external host apparatus 300 which sends various control signals to the high definition video decoding apparatus 200, and controls the single digital video data output from the high definition video decoding apparatus 200 for use. According to the external video processing apparatus 400 and the plurality of digital audio output from the high-definition video decoding apparatus 200, and an external audio processing apparatus for performing various processing such as audio mixing according to the purpose ( 500 and an analog video signal output from the high quality video decoding apparatus 200. It consists of a TV monitor 600 and, TV speaker 700 that outputs the analog audio signal output from the high-quality video decoding apparatus 200.

Looking at the operation of the digital multimedia system configured as described above are as follows.

First, when a plurality of digital media input apparatuses 100 input a media stream to be processed by the high definition video decoding apparatus 200, the high definition video decoding apparatus 200 receives a signal output from the digital media input apparatus 100. The input signal is decoded by the control signal of the external host device 300. Here, the signal input to the digital media input device 100 is based on the MPEG-2 TS signal, and may have various forms according to the purpose of the invention device. For example, when accommodating a multimedia communication service in an ATM (Asynchronous Transfer Mode) network, the high definition video decoding apparatus 200 has a network access device as a secondary device, and an input signal is an MPEG-2 TS made of an ATM cell. It can be in form.

The external video processing apparatus 400 processes the single digital video data output from the high definition video decoding apparatus 200 in various forms according to the purpose. Here, the digital video output from the high definition video decoding apparatus 200 is a signal conforming to the National Television System Committee (NTSC) video standard. The external audio processing apparatus 500 inputs a plurality of digital audio signals output from the high definition video decoding apparatus 200 and performs various processing such as audio mixing according to the purpose. In this case, the digital audio output from the high definition video decoding apparatus 200 is a raw linear pulse code modulation (PCM) audio signal. The TV monitor 600 outputs an analog video signal output from the high definition video decoding apparatus 200, and the TV speaker 700 outputs an analog audio signal output from the high definition video decoding apparatus 200.

The control signal output from the external host device 300 may vary according to the use of the high definition video decoding apparatus 200 and the type of the host device, and when used as part of a multimedia system, the high definition video decoding apparatus ( 200) must have an external host interface unit in addition. Examples include the PCI bus of a personal computer or the VME interface connection function.

FIG. 2 is a diagram illustrating an internal configuration of the decoding apparatus of FIG. 1, wherein a plurality of media inputs are formed by outputting various types of media input from an external media input apparatus 100 into an MPEG-2 TS format digital media stream according to the MPEG standard. A plurality of media decoding devices 220 for decoding digital video and digital audio signals by decoding a signal of a digital media stream in the form of MPEG-2 TS outputted from the media input interface device 210; And a system control apparatus 230 for initializing each component of the entire decoding apparatus, and collectively controlling the components according to a use and an operation state, and a plurality of digital video data output from the media decoding apparatus 220 and dividing them. A video processing unit 240 merging and outputting a single video signal; An analog media output control device 250 that converts a digital video signal output from the 240 into an analog and outputs it to an external AV device such as a TV or a computer monitor / speaker, and an interface function with a host when used as part of a multimedia system. It is composed of a host interface device 260 in charge.

The operation of the decoding device 200 configured as described above is as follows.

A plurality of media input interface devices 210 make various types of media input from the external media input device 100 into digital media streams according to the MPEG standard and input the streams to meet the conditions of the media decoding device 220. After outputting the data, the plurality of media decoding apparatuses 220 inputs and codes a digital media stream (ie, MPEG-2 TS, MPEG-1 System) according to the MPEG standard outputted from the media input interface device 210. The recovered digital video and digital audio signals are output to the external audio processing device 500 and the analog media output control device 250. In this case, the generated digital video / audio is as many as the number of media inputted, and the number may be determined according to the purpose of the decoding apparatus 200. The number of media decoding apparatus 220 is determined as needed, and there is no logical limitation on the number. That is, a plurality of devices having the same structure exists. In addition, the media input interface device 210 should perform other functions according to the type of an external media input device. For example, when the decoding device 200 is used in a multimedia communication service system, the media input interface device may also function. It includes.

In addition, the system controller 230 initializes each component of the decoding apparatus and collectively controls the components according to the purpose and operation state. When the media input interface apparatus 210 is used for information of a media input and a communication service, Outputs information of devices transmitting the media, and transmits and receives control information with the external host and various information related to the media generated after decoding with the host interface device 260, and the media decoding apparatus 220 is required for media decoding Information is output, and the video processing apparatus 240 outputs position and size information of each video for segmentation / merging of the videos. In addition, the analog media output control device 250 outputs an output control signal of analog media.

The video processing apparatus 240 inputs a plurality of digital video data conforming to the NTSC standard, which is restored from the media decoding apparatus 220, and splits / merges the digital video data into a single video signal and the external video processing apparatus 400 Output to the analog media output control unit 250, the analog media output control unit 250 is a single NTSC digital and linear PCM audio data as many as the number of the media decoding device 220 output from the video processing unit 240 The video signal is converted to analog and output to an external AV device such as a TV or a computer monitor / speaker.

When the decoding device 200 is used as part of a multimedia system, the host interface device 260 functions as an interface with a host, and its function varies depending on the type of the external host device 300. For example, it may have an interface such as VME, PCI, or the like.

3 is an internal configuration diagram of the video processing apparatus of FIG. 2, which includes a plurality of video storage elements 241 for storing a video signal decoded and output from the media decoding apparatus 220 and outputting a video signal by a control signal; Based on the video vertical sync signal and the horizontal sync signal, the input enable signal of the video memory device 241 is controlled to subsample the video size input to the video memory device 241 to adjust the size. A video output from the video storage device 241 by determining a video size controller 242, a location where each video is located on the screen, and controlling an output enable signal of the video storage device according to the video vertical / horizontal synchronization signal. A video position controller 243 that controls the position of the video signal, and merges the scaled and position-adjusted video signals into a single video. The video storage device 241 is configured to merge video controller 244 for controlling so as to maintain the high impedance state when not outputting the data.

The operation of the video processing apparatus 240 configured as described above is as follows.

First, a plurality of video storage elements 241 connected to the media decoding apparatus 220 store an input video signal, adjust the size of the input video under the control of the video size controller 242, and then adjust the video position controller 243. And a video signal having the adjusted position and size are output to the external video processing apparatus 400 and the analog media output control apparatus 250 under the control of the video merging controller 244. Here, the video memory device 241 may use a variety of different memory devices, but it is most efficient to use a field memory due to its characteristics.

The video size controller 242 is for controlling the size of the video input to the video memory device 241. The video size controller 242 controls the size of the video by controlling the input enable signal of the video memory device based on the video vertical sync signal and the horizontal sync signal. Subsampling to adjust the size. That is, the video signal stored in the video memory element 241 is already adjusted in size. Then, the video position controller 243 determines the place where each video is to be placed on the screen and controls the output enable signal of the video memory device according to the video vertical / horizontal sync signal, thereby outputting the video from the video memory device 241. Control the position of Video merge controller 244 merges each of the scaled and positioned video signals into one single video and controls each video storage element to maintain a high impedance state while not outputting data. Here, the reason for maintaining the high impedance state is that the outputs of the respective memory elements may hit each other, thereby making the state of a single video abnormal.

As described above, the high-definition video decoding apparatus for multiple input and single output of the digital multimedia system according to the present invention performs integrated high-definition decoding and freely reconstructs the decoded digital screens on one TV or computer monitor. You can show one digital video.

The present invention provides a media decoding means for receiving a plurality of MPEG-2 media streams from external media stream input devices and decoding them to recover a plurality of digital video and digital audio signals, and segmenting the reconstructed video signals according to a desired type. Video processing means for merging / reconstructing into a single video, analog media output control means for converting the processed video and audio signals to analog and outputting them through a TV, and system control means for overall control of the entire apparatus. A multi-input, single input of a digital multimedia system further comprising a host interface means necessary when the device is mounted as an accessory of another device, and a communication network connection means for the case where the device is used as part of a multimedia communication service device. High Definition Copper for Output By providing an image decoding device, it is possible to perform a plurality of high-definition decoding of the integrated form, and freely reconstructs the decoded digital screens into a single digital video to show on one TV or computer monitor, various multimedia systems It can be widely used as a media decoding and video processing apparatus in an internal media processing apparatus, a multimedia communication service, digital broadcasting, a terminal of an on-demand video service, a multipoint access control apparatus for video conferencing, and the like.

Claims (4)

In the high-definition video decoding apparatus for inputting and decoding a plurality of media signals in a digital multimedia system and output as a single video, Creates and outputs various types of media input from an external media input apparatus 100 into a MPEG-2 TS format digital media stream according to the MPEG standard, and when the decoding apparatus 200 is used in a multimedia communication service system, accesses a communication network. A plurality of media input interface devices 210 functioning; A plurality of media decoding devices (220) for decoding digital video and digital audio signals by decoding signals of the MPEG-2 TS format digital media stream outputted from the media input interface device (210); A system control apparatus 230 for initializing respective components of the entire decoding apparatus and controlling the overall operation according to the use and the operation state; A video processing device (240) for inputting a plurality of digital video data output from the media decoding device (220), dividing / mating them according to a desired type, and outputting them into a single video signal; An analog media output control device 250 for converting a digital video and audio signal of a moving picture output from the video processing device 240 into an analog signal and outputting it to an external AV device such as a TV or a computer monitor / speaker; High-definition video decoding apparatus for multiple input, single output of the digital multimedia system, characterized in that consisting of a host interface device 260 that performs the interface function with the host when the decoding device 200 is used as part of the multimedia system. The method of claim 1, The system control device 230 outputs information of media to be input to the media input interface device 210 and information of devices for transmitting the media when used for a communication service, and an external host from the host interface device 260. Control information and various information related to the media generated after decoding is transmitted and received, the media decoding apparatus 220 outputs information of media necessary for media decoding, and the video processing apparatus 240 for splitting / merging video Outputs position and size information of each video, and outputs a control signal of analog media to the analog media output control device 250 to control the entire system. Video decoding device. The method of claim 1, The video processing apparatus 240 includes a plurality of video storage elements 241 for storing the video signals decoded and output from the media decoding apparatus 220 and outputting the video signals by the control signals; A video size controller which controls an input enable signal of the video memory device 241 based on a video vertical sync signal and a horizontal sync signal to subsample the video size input to the video memory device 241 to adjust the size. 242); A video position controller which determines a position where each video is to be located on the screen and controls the output enable signal of the video memory device according to the video vertical / horizontal synchronization signal to control the position of the video output from the video memory device 241 ( 243); And a video merge controller 244 that merges the scaled and positioned video signals into a single video and controls each video storage element 241 to maintain a high impedance state while not outputting data. High-definition video decoding device for multiple input, single output of a digital multimedia system. The method of claim 3, wherein And a plurality of video memory elements (241) are field memories. High-definition video decoding apparatus for a multiple input, single output of a digital multimedia system.