KR20010073671A - Method for transmitting and processing an on screen display data - Google Patents

Abstract

PURPOSE: An OSD data transferring and processing method is provided to perform a normal OSD operation even when being used in a DVD player and a digital TV without an MPEG decoder by adding identification information identifying the type of transfer data and sorting the data stream in accordance with the identification information to perform decoding and signal processing for the sorted data stream. CONSTITUTION: In a first step, self data are generated apart from data stream provided from a record medium or externally. In a second step, identification information representing the types of the generated data is generated. In a third step, the generated data are structured into a transfer packet format of the provided data stream, and the generated identification information is added to a data area of the transfer packet to be transferred.

Description

Method for transmitting and processing an on screen display data

The present invention provides on-screen display (OSD) data such as menu information guiding functions and operations that can be provided from a DVD (Digital Versatile Disc) or DVD player, to a Vestigial Side (VSB). The present invention relates to an on-screen display data transmission and processing method which transmits to an external connection device such as a digital television (D-TV) connected through a band interface, and enables the external connection device to identify and signal the external connection device.

First, FIG. 1 illustrates a configuration of a general DVD-player, and the DVD player 100 reads data stored in a disc recording medium 1 such as a DVD as a high frequency signal. Optical pickup (P / U) 2 to be shipped; An analog signal processor (3) for analog signal processing the read high frequency signal; A digital signal processor (4) for processing the signal-processed analog signal through a digital signal and outputting the digital signal as a program stream (PS), which is an digital data stream in an MPEG format; An amplifier pack decoder 5 for decoding the output program stream and restoring the original program data to original digital data; An NTSC encoder and D / A converter (6) for encoding and D / A-converting the original digital data, which are restored and outputted, into NTSC analog audio and video signals and outputting them to a general television (200); An OSD data generator 8 for generating and outputting on-screen display (OSD) data for user selection and guidance; A microcomputer (7) for controlling the operation of the components; And a memory 9 for storing data necessary for the control operation of the microcomputer, which is used in connection with the general television 200 of the NTSC system, which is described in the DVD player 100 configured as described above. Is as follows.

First, when a reproduction operation request key is input from the user, the microcomputer 7 sets the current operation mode to the reproduction mode. Accordingly, the optical pickup 2 is recorded on the DVD 1. The signal is read out as a high frequency signal, and the high frequency signal to be read is processed by the analog signal processing unit 3 and the digital signal processing unit 4 into a program stream PS, which is an digital data stream in an MPEG format. The amplifier is output to the amplifier pack 5.

The amplifier pack 5 receives the received data and restores the original digital data, while the restored digital data is NTSC analog audio signal and the NTSC encoder and the D / A converter 6. Since it is encoded and D / A-converted into a video signal and transmitted to the general television 200 of the NTSC system, in the general television 200, video screens and playback sounds corresponding to the video and audio read out from the DVD 1 are output. Will print

Meanwhile, when an OSD screen output is requested from a user, for example, a key for requesting a display of a menu screen for guiding functions and operations that may be provided by the DVD 1 or the DVD player 100 may be provided. When the input is received, the microcomputer 7 controls the operation of the OSD data generator 8, and the OSD data generator 8 generates and generates OSD data corresponding to the menu screen. The analog video signal output from the NTSC encoder and the D / A converter 5 and transmitted to the general television 200 by outputting to the amplifier pack 5 is a video signal corresponding to the menu screen and a read signal from the DVD. The processed reproduction video signal is mixed and output.

Therefore, a menu screen, which is guide information about various functions and operations that may be provided from the DVD 1 or the DVD player 100, is displayed on the screen of the general television 200, so that the user may check the A key corresponding to the desired operation or function can be selected and entered.

Meanwhile, the DVD player configured and operated as described above may be used to connect a communication channel such as a VSB to a digital television (D-TV) capable of displaying a high-definition video. Since the decoder 5 is separately included, a DVD player which does not include the amp pack decoder has been recently developed and released.

However, in the case where the DVD player and the digital television which are not provided with the amp pack decoder 5 as described above are connected and connected through a communication channel such as VBS, in the DVD player, the digital signal processor 4 and the OSD are used. After reconstructing digital data and OSD data output from the data generator 8 into a transport stream (TS), which is an amp data type digital data stream, it is modulated into a VBS format data stream and transmitted. In the digital television, the digital television must receive and demodulate the data, and decode and process the digital data and the OSD data, respectively. Therefore, identification information capable of identifying the reproduction digital data and the OSD data can be identified in the VBS format data stream. In other words, an identification definition that can identify the type of transmission data. Additional transmission method, and a situation that is urgently needed is a data processing method thereof.

Therefore, the present invention was created to solve the above problems, and when transmitting a data stream to an external connection device such as a digital television connected through a communication channel such as VBS, the on-screen display data, such as To provide on-screen display data transmission and processing method by adding identification information for identifying the type of transmission data, and transmitting and decoding and signal-processing each data type according to the identification information. , Its purpose is.

1 illustrates a configuration of a general DVD player.

FIG. 2 illustrates a configuration of a DVD player and a digital television (D-TV) to which an on-screen display (OSD) data transmission and processing method according to the present invention is applied.

3 shows data type identification information recorded in a data area of a transmission packet according to the present invention;

4 shows an on-screen display screen in a digital television according to the present invention.

※ Explanation of code for main part of drawing

1,31: Optical disc 2,32: Optical pickup (P / U)

3,33: analog signal processor 4,34: digital signal processor

5: MPEG decoder 6: NTSC encoder and D / A converter

7,39: Micom 8,37: OSD data generator

9,40: Memory 35: MPEG TS mux

36: VSB modulation / output unit 38: transmission packet generation unit

51: VSB receiving / demodulation unit 52: Demux (Demux)

53: audio decoder 54: audio signal processor

55: video decoder 56: video signal processing unit

57: OSD decoder 58: OSD signal processing unit

59: summer 100,300: DVD player

200: regular television 500: digital television

In accordance with another aspect of the present invention, there is provided a method for transmitting on-screen display data, the method comprising: generating its own data separately from a recording medium or a data stream provided from the outside; Generating identification information indicating the type of the generated data; And constructing the generated data in the form of a transmission packet of the provided data stream, and adding and transmitting the generated identification information to a data area of the transmission packet.

In addition, the on-screen display data processing method according to the present invention, step 1 of searching and confirming identification information indicating the data type of the received transmission packet; Performing a decoding operation corresponding to a data type of the transmission packet based on the identified identification information; And synthesizing the two different types of decoded data and outputting the screen.

Hereinafter, preferred embodiments of the on-screen display data transmission and processing method according to the present invention will be described in detail with reference to the accompanying drawings.

First, FIG. 2 illustrates a configuration of a DVD player and a digital television to which the on-screen display data transmission and processing method according to the present invention is applied. The DVD player 300 includes a disc recording medium such as a DVD (DVD). An optical pickup (P / U) 32 for reading out data stored in 31) as a high frequency signal; An analog signal processor 33 for analog signal processing the read high frequency signal; A digital signal processor 34 for digitally processing the signal-processed analog signal and outputting the digital signal as a program stream PS which is an digital data stream in an MPEG format; An amppack TS mux 35 which muxes the output program stream and outputs it as a transport stream TS; A VBS modulation / output unit (36) for modulating the output transport stream into a VBS format data stream and transmitting the same to a digital television connected through a VBS communication channel; An OSD data generator 37 generating and outputting on-screen display (OSD) data for user selection and guidance; A transmission packet generator 38 configured to convert the OSD data into a transmission packet and output the converted OSD packet to the amp pack TS mux 35; A microcomputer 39 for controlling the operation of the components; And a memory 40 that stores data necessary for the control operation of the microcomputer.

On the other hand, the digital television 500, Demux for separating and outputting the transmission packet of the data stream received from the DVD player 300 via the VB receiver / demodulator 51 by data type 52; An audio decoder (53) for decoding the transmission packet of the audio data separated and output by the demux and restoring and outputting the original audio data; An audio signal processor 54 for processing the restored audio data as a signal and outputting the reproduced audio signal; A video decoder 55 for decoding the transmission packet of the video data separated and output by the demux and restoring and outputting the original video data; A video signal processor 56 for signal processing the reconstructed output video data and outputting the reproduced video signal; An OSD decoder (57) for decoding the transmission packet of the on-screen display data separately output by the demux and restoring and outputting the original on-screen display data; An OSD signal processor 58 for signal processing the restored OSD data and outputting the OSD data as an original OSD image signal; And an adder 59 for superimposing and outputting the reproduced video signal and the OSD image signal. The on-screen display data of the DVD player 300 and the digital television 500 that are configured and connected as described above are used. The transmission and processing method will be described in detail as follows.

First, when a playback operation request key is input from the user, the microcomputer 39 of the DVD player 300 sets the current operation mode to the playback mode. Accordingly, the optical pickup 32 sets the DVD. The signal recorded in 31 is read as a high frequency signal, and the high frequency signal to be read out is a program stream (MPEG) digital data stream by the analog signal processor 33 and the digital signal processor 34. PS) and the signal is output to the amppack TS mux 35.

The Amppack TS mux 35 receives the converted signal and converts it into a transport stream for transmission to a digital television 500 connected through a digital interface such as IEEE 1394. The VBS modulation / output unit 36 ) Modulates the data into a VBS format data stream and outputs the same, when the OSD screen output is requested from the user, for example, a function that may be provided by the DVD 31 or the DVD player 300. When a key for requesting display of a menu screen for guiding an operation is received, the microcomputer 39 controls the operation of the OSD data generator 37 and the OSD data generator 37 ) Generates and generates OSD data corresponding to the menu screen, and outputs the generated OSD data to the transmission packet generator 38. In the transmission packet generator 38, As shown in FIG. 3, the OSD data is converted into a transmission packet (TSP) and output to the amppack TS mux 35. The transmission output from the transmission packet generation unit 38 is performed. As shown in Fig. 3, the packet TSP is composed of 1 byte of header information and 187 bytes of transmission data. The packet TSP is used to identify the type of transmission data in the 187 bytes of the transmission data area. Identification information, for example, two bits of flag information is additionally recorded, and the identification information has a value when the transmission data of 187 bytes-2 bits is a main data stream corresponding to video and audio data. If the transmission data of 187 bytes-2 bits is a PSIP data stream corresponding to Program Specific Information Protocol (PSIP), the value is set to '00'. If the transmission data of 187 bytes-2 bits is an OSD data stream corresponding to the on-screen display data, the value is set and recorded as '10'. When the transmission data of 187 bytes-2 bits is another data stream other than the type of the data, the identification information is set to '11' so as to be identified.

On the other hand, the amppack TS mux 35, for receiving the transmission packet with the additional identification information indicating the data type as described above, for transmitting to the connected digital television 500 via a communication channel such as VBS Converting the transport stream into a data stream in a VB format and outputting the data stream transmitted to the digital television 500. The identification information for identifying the data type of the transmission packet is included and transmitted.

Accordingly, in the demux 52 of the digital television 500, a transmission packet received through the VBS reception / demodulation unit 51 and demodulated, in particular, two bits of additionally recorded in 187 bytes of transmission data are identified. The information value is searched and confirmed, and according to the result of the check, the received transmission packet is separated and output through different paths. For example, when the identification value is '00', 187 bytes-2 bits It is determined that the transmission data is the main data stream, and is separately outputted as audio and video data. When the identification information value is '10', it is determined that the transmission data of 187 bytes-2 bits is an OSD data stream. The video data will be separated and output through different paths.

On the other hand, the audio data separated and output by the demux 52 is decoded by the audio decoder 53 and restored to the original audio data, and then signal-processed and reproduced by the audio signal processing unit 54. The video data output as an audio signal and separated and output by the demux 52 is decoded by the video decoder 55 and reconstructed and output as original video data by the video signal processor 56. After the signal is processed and output as a reproduced video signal, the OSD data separated by the demux 52 is decoded by the OSD decoder 57 and restored to the original OSD data, and then the OSD signal processing unit ( 58) to process the signal and output the OSD video signal.

Therefore, as shown in FIG. 4, the video screen of the digital television 500 displays a menu screen which is guide information on various functions and operations that may be provided from the DVD 31 or the DVD player 300. The user can check this and select and input a key corresponding to the desired action or function.

For reference, the identification information additionally recorded as two bits of flag information in the transmission data area of the transmission packet may identify various types of data using three or more bits, depending on the data type of the transmission packet. It can be recorded additionally.

The on-screen display data transmission and processing method according to the present invention as described above, the on-screen when the data stream is transmitted from the DVD player to an external connection device such as a digital television connected and connected through a communication channel such as VBS, An amplifier pack is not provided by additionally recording and transmitting identification information for identifying a type of transmission data such as display data, and decoding and signal-processing the data stream transmitted according to the identification information separately for each data type. Even when using a DVD player and a digital television connection, it is a very useful invention to be able to perform on-screen display operation normally.

Claims (7)

Generating the own data separately from a recording medium or a data stream provided from the outside; Generating identification information indicating the type of the generated data; And And configuring the generated data in the form of a transmission packet of the provided data stream, and adding and transmitting the generated identification information to the data area of the transmission packet. Data transmission method. The method of claim 1, The identification information is flag information configured to identify at least two or more data types including on-screen display data by using two bits included in the data area of the transmission packet. Transmission method. The method of claim 1, In the step 3, the transmission packet to which the identification information is added is modulated into a Vestigial Side Band (VSB) transmission format and transmitted to an external connected device connected and connected through a VSB interface. Data transmission method. The method of claim 3, wherein The external connection device is a digital television that separates, decodes, and processes the data stream of the transmitted VBS format into at least two data types including on-screen display data, respectively. Transmission method. Step 1 of retrieving and identifying identification information indicating a data type of a received transmission packet; Performing a decoding operation corresponding to a data type of the transmission packet based on the identified identification information; And And synthesizing the two different types of decoded data and outputting the same to each other. 3. The method of claim 5, The identification information is flag information configured to identify at least two or more data types including on-screen display data using two bits included in the data area of the transmission packet. Treatment method. The method of claim 5, In the step 2, the transmission packet is divided into at least two or more data types including on-screen display data, and each of the on-screen display data processing method is characterized in that the decoding and signal processing.