KR100617655B1 - PVR System for processing video and caption data - Google Patents

Abstract

The present invention provides a method for storing and reproducing video and subtitle information by removing the vertical black bar phenomenon, which can essentially eliminate the vertical black bar that may occur when the subtitle information is stored and played back in a conventional FB system. Its purpose is to provide a VRL system.

The video system for storing and reproducing video and subtitle information according to the present invention is configured to input video data and slice data output from the MPEG decoder to the MPEG encoder through different paths, thereby internally in the MPEG encoder. This prevents the SAV signal of the next line to be encoded or line blanking from occurring in the middle. Also, the order of Cb, Y, Cr, Y, etc. in the active video data is not aligned. It breaks down, which makes it possible to fundamentally eliminate problems such as strange colors.

Vertical black bar, video data, slice data, MPEG encoder

Description

FIV system for processing and storing video and caption information {PVR System for processing video and caption data}             

1 is a block diagram of a conventional FB system for storing and reproducing video and subtitle information.

2 is a diagram illustrating a CCIR 656 format corresponding to a form of data output from an NTSC decoder;

3 illustrates CCIR 656 format lines corresponding to radix fields.

4 is a view showing an image in which vertical black bars and abnormal colors are shown

5 is a block diagram of a FB system for storing and playing back video and subtitle information according to the present invention.

FIG. 6 is a view for explaining how VBI slice data and video data are input to an MPEG encoder through different paths. FIG.

<Explanation of symbols for the main parts of the drawings>

101: NTSC tuner 120: NTSC decoder

130: MPEG encoder 140: MPEG decoder

150: storage means 160: control unit

The present invention relates to a personal video recorder (PVR) system for storing and playing back video and subtitle information.

Recently, with the digital television boom, the digital TV has a built-in function of the digital TV according to the needs of customers who want to store images serviced on a hard disk drive (HDD) installed in the system in real time. .

In addition, digital television has basically adopted a function for decoding and displaying caption broadcasting for the disabled. In particular, in the case of 14-inch North American export type, the caption function must be supported.

The television with the FB function also needs to be able to store subtitle information included in storing the image information together in the HDD and display the subtitle information again in the playback mode.

The configuration and operation of a conventional FB system for reproducing video and subtitle information stored in a HDD will be briefly described with reference to the accompanying drawings.

1 is a block diagram of a conventional FB system for storing and reproducing video and subtitle information.

Referring to FIG. 1, a conventional TV system for storing and reproducing video and subtitle information may be used to receive a National Television System Committee (NTSC) analog audio / video (A / V) broadcast signal. NTSC tuner 101, NTSC decoder 102 for converting the analog audio / video signal from analog to digital and outputting the signal, and EMPG for MPEG encoding and TS muxing the signal output from the NTSC decoder 102 ( Moving Picture Experts Group (MPEG) encoder 103, an EMPG decoder 104 for decoding the encoded data output from the EMPG encoder 103, and the encoded data output from the EMPG encoder 103. And a storage unit 105 for storing the transport stream and a control unit 106 for controlling other components in accordance with a user command input.

An operation for reproducing image and caption information in a conventional FB system for storing and reproducing image and caption information configured as described above will be described.

First, a signal of a channel tuned from the NTSC tuner 101 is a CVBS (Composite Video Banking Sync) type signal and 262/263 lines are input to the NTSC decoder 102 for each top / bottom field.

At this time, the subtitle signal is carried in the vertical blanking interval (VBI). The vertical blanking section is a section to be sent for additional services such as data / text in addition to the audio / video signal. Typically 6 to 22 lines correspond to the VBI.

The CVBS signal input to the NTSC decoder 102 is input to the MPEG encoder 103 in the form of raw-data and VBI-sliced data.

The raw data is data obtained by simply converting the input CVBS signal into a digital signal, and the VBI slice data is separated from the caption data of the 21st line and the video signal in the VBI section as a digital signal and the MPEG encoder 103. Is entered.

2 is a diagram illustrating a CCIR 656 format corresponding to a form of data output from an NTSC decoder, and FIG. 3 is a diagram illustrating CCIR 656 format lines corresponding to an odd field.

As described above, the CCIR 656 format, in which one NTSC image (when an Odd Field) including a vertical blanking interval (VBI) is output through a video decoder, is as shown in FIG. 3.

As one embodiment according to the related art, the video processing apparatus may be configured by using a video decoder called VPX3226F as the NTSC decoder 102 shown in FIG. 1 and using an encoder called BCM7040 as the MPEG encoder 103.

In this case, the CCIR 656 format data lines as shown in FIG. 3 are input to the BCM7040 encoder using the VBI-slicer inside the VPX3226F.

However, the BCM7040 is internally operated by a microcode method, and in the case of such a microcode, the incoming CCIR 656 format line is checked.

Meanwhile, the standard analog signal alternates 262 lines in the odd field and 263 lines in the even field. However, in the case of non-standard signals, for example, when regenerating old BC tapes, mixing noise components into the signal, or shorting the radio frequency (RF) signal cable continuously, the number of lines per field is significantly higher than the standard value. It becomes smaller or larger by quantity.

4 is a view showing an image in which a vertical black bar and an abnormal color are shown.

As described above, when the number of lines per field becomes smaller or larger than the standard value, as shown in FIG. 4, the BCM7040 does not find the SAV of the next line to be encoded internally, or the line gap is in the middle. This can happen. In addition, the order of Cb, Y, Cr, and Y in the active video data is broken, causing a color problem.

An object of the present invention is to configure a video decoder to input sliced data to an MPEG encoder through a different path, thereby fundamentally eliminating the vertical black bar phenomenon that may occur when storing and playing caption information in a conventional FB system. It is an object of the present invention to provide a FB system for storing and playing back video and subtitle information that can be removed.

In order to achieve the above object, a FB system for storing and reproducing video and subtitle information according to the present invention includes an analog tuner for receiving an analog audio / video broadcast signal, and an analog audio / video output of the analog tuner. An analog decoder for converting signals from analog to digital and outputting video data and slice data through different paths, an MPEG encoder for MPEG encoding and TS muxing the signals output from the analog decoder, and an output from the MPEG encoder An MPEG decoder for decoding the encoded data, the storage means for storing the encoded data output from the MPEG encoder as a transport stream, and a control unit for controlling other components according to a user command input. Being The features.

The MPEG decoder may reproduce audio / video data stored in the storage means.

According to the configuration of the present invention as described above, by configuring the video data and the slice data output from the MPEG decoder to the MPEG encoder through a different path, the SAV signal of the next line to be encoded internally in the MPEG encoder The problem of not finding or coming in the middle of the line blank can be prevented, and the problem of abnormal color of the active video data can be fundamentally eliminated.

Hereinafter, a fibral system for storing and reproducing video and subtitle information according to the present invention will be described in detail with reference to an embodiment.

FIG. 5 is a block diagram of a FV system for storing and reproducing video and subtitle information according to the present invention.

As shown in FIG. 5, the FB system for storing and reproducing video and subtitle information according to an embodiment of the present invention includes an analog tuner for receiving an NTSC analog audio / video (A / V) broadcast signal. NTSC tuner 101 is provided.

NTSC decoder 102 is an analog decoder for converting the analog audio / video output signal of the analog tuner from analog to digital output. The NTSC decoder 102 converts the analog audio / video output signal from analog to digital and then separates the video data and the slice data and outputs them through different paths.

The EMPG (Empeg) encoder 103 performs MPEG encoding and TS muxing on the signal output from the NTSC decoder 102. The EMPG encoder 103 is controlled to separately receive video data and slice data output from the NTSC decoder 102.

The EMPG decoder 104 decodes and outputs the encoded data output from the EMPG encoder 103.

The storage means 105 stores the encoded audio / video data output from the EMPG encoder 103 in the form of a transport stream.

The control unit 106 controls each component of the FV system for storing and playing back video and subtitle information according to a user command input signal.

An operation of a fibral system for storing and reproducing video and subtitle information according to an embodiment of the present invention configured as described above will be described.

First, when the channel information selected by the user is controlled by the controller 106, the NTSC analog audio / video signal for the selected channel among the NTSC analog audio / video broadcast signals input to the NTSC tuner 101 is tuned and output.

The NTSC decoder 102 converts the analog audio / video output signal output from the TSC tuner 101 from analog to digital, separates the video data and the slice data, respectively, and uses an EMPG encoder 103 through a different path. Will be printed).

When using the VPX3226F as the NTSC decoder 102 according to the conventional configuration, the VBI and the video data are input to the BCM7040 used as the EMPG encoder 103 as one frame without separating the VBI and the video data in the 656 format. In such a case, even though the VBI is already parsed in the BCM7040, the SAV of the VBI and the SAV of the video data must be found again during encoding. In the case of non-standard signals, an error may exist in the process of finding the SAV. have.

Accordingly, in the exemplary embodiment of the present invention illustrated in FIG. 5, when the NTSC decoder named uPD64011A is used as the NTSC decoder 102, two of raw data and VBI sliced data are output in an output form. You will get output that is classified into branches. Raw data and VBI sliced data output, which are classified into two types as described above, are divided into ①path and ②paths from the NTSC decoder 102, as shown in FIG. It is output to the EMPG encoder 103.

FIG. 6 is a view for explaining how VBI slice data and video data are input to an MPEG encoder through different paths.

As shown in Fig. 6, ① path of the video data of the CCIR 656 format is input to the EMPG encoder 103 consisting of BCM7040, ② path of the EMPG encoder 103 of the VBI slice data of the CCIR 656 format is composed of BCM7040 Is entered.

Since the BCM7040 operates internally in a microcode method, in order to receive and process VBI slice data entering a path, the microcode may be modified again. However, existing non-standard signals can be introduced to fundamentally solve the possibility of error in finding SAV at the boundary between VBI slice data and video data. Of course, in order for the subtitles to be synchronized with the video during encoding, the subtitles can be included in the uPD64011A through the I ² C bus until the actual one video is encoded. Need to be optimized.

As described above, the EMPG encoder 103 performs MPEG encoding and encoding of the corresponding signals under the control of the control unit 160 for the video data that is input into the raw data and the VBI sliced data. Output after muxing TS (Transport Stream).

The MPEG-encoded and TS muxed signals are stored in the form of encoded audio / video data transport stream in the storage means 105.

Meanwhile, in order to reproduce audio / video data stored in the form of a transport stream encoded in the storage means 105, the audio / video data in the form of a transport stream stored in the storage means 105 is read and sent to the EMPG decoder 104. Output it.

Subsequently, the EMPG decoder 104 decodes and outputs the audio / video data in the form of the transport stream, thereby reproducing the corresponding audio / video information.

The above has been described in detail a fiBAL system for storing and playing back video and subtitle information according to the present invention. However, the present invention is not limited thereto, but the present invention may be included in the present invention even if the present invention is carried out without change and modification without departing from the spirit of the present invention, and the fact will be apparent to those skilled in the art.

According to the FB system for storing and reproducing video and subtitle information according to the present invention, it is possible to prevent the MPEG encoder from finding the SAV signal of the next line to be encoded internally or to prevent the line blanking from occurring. In addition, the Cb, Y, Cr, Y, etc. in the active video data, the order is broken, and the color is also abnormally eliminated, there is an effect that can clearly see the image containing the subtitle information. .

Claims (2)

An analog tuner for receiving analog audio / video broadcast signals; An analog decoder for converting the analog audio / video output signal of the analog tuner from analog to digital and outputting video data and slice data through different paths; An MPEG encoder for MPEG encoding and TS muxing the signal output from the analog decoder; An MPEG decoder for decoding the encoded data output from the MPEG encoder; Storage means for storing the encoded data output from the MPEG encoder as a transport stream and a control unit for controlling other components in accordance with a user command input, the storage and playback of the video and subtitle information, characterized in that FIVEAL system. The video system of claim 1, wherein the MPEG decoder is capable of reproducing audio / video data stored in the storage means.

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