KR100840567B1 - Personal video recorder with wibro and using method - Google Patents

Abstract

The present invention relates to a personal video recorder to which WiBro is applied, receives a transport stream (TS) by receiving a request for receiving a stream modulated by Quadrature Phase Shift Keying (QPSK) of a digital video broadcasting-satellite (DVB-S) method, A tuner for performing QPSK demodulation on the received transport stream, a TS-PS switching unit for converting the demodulated stream into a program stream (PS), and controlling to execute WiBro if the reception of the QPSK system stream is not requested. A control unit, a WiBro transceiver for receiving and storing a program stream from the WiBro, a descrambler for determining whether or not scramble exists in the program stream when performing display, and performing descrambling when the scramble exists; A decoder for decoding the program stream transmitted from the PS switching unit or the descrambler, In that it comprises a memory unit that stores the transmission signal, a display for displaying the decoded program stream it is characterized.

PVR, WIBRO, Scrambling, PIP

Description

PERSONAL VIDEO RECORDER WITH WIBRO AND USING METHOD}

1 is a diagram illustrating a structure of a PVR to which a WiBro is applied according to a preferred embodiment of the present invention;

2 is a flowchart illustrating an operation procedure of a PVR to which a WiBro is applied according to an exemplary embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display and storage technology in a personal video recorder, and more particularly, to a personal video recorder to which a WiBro is applied, which is suitable for implementing WiBro technology in a personal video recorder, and a method of using the same.

The trend of broadcasting digitalization is progressing rapidly through existing media such as terrestrial, satellite, and cable TV broadcasting, and WiBro is a new media in communication method to represent the new flow of digitalization and convergence with communication.

The WiBro is a service that enables wireless Internet access at high speed during stop motion anytime and anywhere using a portable Internet terminal, and is used in the 2.3Mhz band. This is a concept in which an Internet Protocol (IP) is assigned, so that various data or information can be retrieved or received through IP.

In addition, media that appear in broadcast digitization include a personal video recorder (hereinafter referred to as a PVR). The PVR improves the disadvantages of the uncomfortable recording method of the existing VCR () and the VCR tape that the image quality deteriorates over time. The PVR converts the analog signal of satellite broadcasting or terrestrial broadcasting into a digital signal, and the MPEG2 standard of digital TV. Convert to a format and record on a hard disk (HDD) in SD or HD quality. In addition, if the user wants to watch the TV is also sent. Therefore, even if the user pauses while watching the TV, it is possible to stop the TV screen as if watching a video. When the user plays again, the information stored in the hard disk is continuously transmitted on the TV.

As described above, the WiBro and the PVR serve as a portable Internet communication method and a digital broadcast receiving or playing function, respectively, and there is no way to fuse them with each other.

The present invention is to overcome the limitations of the prior art described above, and to receive or store satellite broadcasts with a PVR tuner, and a WiBro capable of receiving local terrestrial broadcasting or various games and data through the WiBro of the PVR. The purpose of the present invention is to provide a personal video recorder and a method of using the same.

Another object of the present invention, the PVR performs the QPSK demodulation in the DVB-S (Digital Video Broadcasting-Satellite) method, while receiving a terrestrial wave-type broadcast by using the WiBro function, to display the display in the PIP mode The present invention provides a personal video recorder to which WiBro can be performed and a method of using the same.

In one aspect of the present invention, as a personal video recorder to which WiBro is applied, a transport stream (TS) is received by receiving a request for receiving a stream modulated by Quadrature Phase Shift Keying (QPSK) of Digital Video Broadcasting-Satellite (DVB-S) method. And a tuner for performing QPSK demodulation on the received transport stream, a TS-to-PS switching unit for converting the demodulated stream into a program stream (PS), and a WiBro if the reception of the QPSK scheme stream is not requested. A control unit for controlling the execution; a WiBro transceiver unit for receiving and storing a program stream from the WiBro; and performing display, determining whether scramble exists in the program stream, and descrambling if the scramble exists. A descrambler to be executed and transmitted from the TS to PS switching unit or the descrambler A decoder for decoding a program stream, a memory unit for storing the decoded broadcast signal, and a display unit for displaying the decoded program stream.

In another aspect of the present invention, as a method of using a personal video recorder to which WiBro is applied, a transport stream is requested when receiving a stream modulated by Quadrature Phase Shift Keying (QPSK) of Digital Video Broadcasting-Satellite (DVB-S) method. Receiving, performing QPSK demodulation on the received transport stream, converting and storing the demodulated stream into a program stream, displaying the stored program stream, and performing the QPSK method stream. If the reception is not requested, the process of executing the WiBro, receiving and storing the program stream from the WiBro, displaying the program stream received from the WiBro, and, if so, scrambled in the program stream The process of determining whether it exists Includes the step of the process of, if the scramble is present, performing descrambling and displaying the descrambled program stream.

Hereinafter, the operating principle of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, when it is determined that a detailed description of a known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

The present invention is for viewing streams different from each other, that is, one satellite broadcast and one terrestrial broadcast through one digital device.

That is, the main is to perform broadcasting by performing Quadrature Phase Shift Keying (QPSK) demodulation of DVB-S (Digital Video Broadcasting-Satellite) using the tuner of the PVR, and the PS is the same device as the PS through WiBro. It receives a stream and decodes it in a PVR decoder to watch a broadcast.

At this time, the PS stream received from WiBro is not only broadcast but also game or other information, and corresponds to the case of watching the broadcast directly from the PC in the terrestrial wave form. In addition, to compensate for the shortcomings of free transmission and reception due to the characteristics of the Internet, and to scramble the PS stream for copy protection, and to perform descrambling in the PVR itself. In this case, even if the PS stream received through WiBro can not watch the broadcast unless a specific set (broadcast viewing is allowed), it can be implemented to be able to view the broadcast only through the descrambling process.

1 is a diagram illustrating a structure of a PVR to which a WiBro is applied according to a preferred embodiment of the present invention.

Referring to FIG. 1, by using a PVR 110 to which WiBro is applied, a satellite broadcast stream may be displayed and a subBroadcast stream may be displayed, so that streams from different methods may be simultaneously displayed. Picture in Picture) mode, the PVR 110 to which the WiBro is applied includes a tuner 112, a WiBro transceiver 114, a TS-to-PS switcher 116, a descrambler 118, and a decoder 120. ), A control unit 122, a memory unit 124, and a display unit 126.

The tuner 112 receives a transport stream (TS) of a DVB-S scheme transmitted from a broadcasting station or a satellite, and performs demodulation using the QPSK scheme. The demodulated TS converts the TS into a program stream (PS) in the TS → PS switching unit 116 and then transfers the TS to the descrambler 118. In this case, the TS-to-PS switching unit 116 will be described in detail. The stream transmitted from the broadcasting station is TS, which is modulated and reaches a set, and is separated into video, audio, and data through demultiplexing from the set. Again, these values are converted to PS through PS multiplexing (mux). Of course, it is also possible to convert the PS to TS. The converted PS is transmitted to the decoder 120, and the decoder 120 decodes the received PS under the control of the controller 122 and stores the PS in the memory unit 124 or transmits the PS to the display unit 126.

Since the broadcast data transmitted using the WiBro communication is received by the WiBro transceiver 144 as a PS, the broadcast data is transmitted to the descrambler 118. In the descrambler 118, when the received PS is scrambling, the descrambler 118 performs a descrambling to view a broadcast. In order to perform the descrambling process for the WiBro PS, a descramble source is embedded in a set or a set is set. There is a need for certification. The method for embedding a descramble source into a set can be obtained via over-the-air activation (OTA) or via WiBro, and authentication is done using the set ID already built into the set. Alternatively, the user may be directly authenticated with the broadcaster and authenticated through WiBro with the authentication key (or ID) provided by the broadcaster. When the PS received from the PVR tuner also transmits a stream of pay broadcasting, it can be scrambled and transmitted. In this case, the TS-to-PS switching unit 116 transfers the descrambler 118 to perform descrambling.

The descrambled WiBro PS performs decoding in the decoder 120, stores the data in the memory unit 124, or transfers the same to the display unit 126 for display. If the PVR PS is already displayed on the display unit 126, the controller 122 controls the WiBro PS to be displayed as a sub using the PIP mode. In addition, while watching one broadcast, the other broadcast may be stored in the memory unit 124.

In this case, when the memory unit 124 is full of data, the broadcast data may be stored in a specific site on the web using the WiBro transceiver unit 144.

2 is a flowchart illustrating an operation procedure of a PVR to which a WiBro is applied according to an exemplary embodiment of the present invention.

Referring to FIG. 2, if a request for reception of a stream modulated with a DVB-S type QPSK is requested in step 202, the transport stream is received in step 204, and the tuner performs QPSK demodulation on the received transport stream in step 206. . If the demodulated broadcast stream is not to be stored in step 208, the flow proceeds to step 214. If it is to be stored, the flow proceeds to step 210. Thereafter, if the stored program stream is to be displayed in step 212, the flow proceeds to step 214 to check whether scrambling is performed on the program stream. If scrambling is performed, the process proceeds to step 216 to perform descrambling, and the process proceeds to step 218 to display. In this case, if the broadcast is being received through the WiBro, the display is performed in the PIP mode.

If the request for stream reception in the QPSK method is not requested in step 202, the WiBro is executed in step 220, and the program stream received in step 222 is stored. When the program stream stored in step 224 is displayed, the process proceeds to step 226 to determine whether the program stream is scrambling, and if scrambling is performed, the process proceeds to step 228 to perform descrambling, and then the process proceeds to step 230. Display the broadcast via WiBro.

However, if scrambling is not performed in step 226, the flow proceeds to step 230 to perform display. At this time, if a conventional QPSK stream is being displayed through the PVR tuner, the PPS mode is displayed.

As described above, the broadcast is displayed by performing QPSK demodulation of the DVB-S method using a tuner of the PVR in one PVR, and receiving the PS stream through WiBro to display the broadcast using the PIP mode. The PS stream received from the PC is capable of not only broadcasting but also games and other information. The PS stream is scrambled and transmitted for copy protection, and descrambling is performed in the PVR itself.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by those equivalent to the scope of the claims.

In the present invention operating as described in detail above, the effects obtained by the representative ones of the disclosed inventions will be briefly described as follows.

According to the present invention, a single PVR device can watch various channels received through satellite broadcasting with a PVR tuner, and can receive terrestrial broadcasting or various games or data with WiBro, and simultaneously broadcast satellite and terrestrial broadcasting. Outputting on the screen or watching one broadcast has the effect of recording another broadcast.

Claims (6)

As a personal video recorder with WiBro, When requesting reception of a stream modulated by Quadrature Phase Shift Keying (QPSK) of DVB-S (Digital Video Broadcasting-Satellite) method, receiving a transport stream (TS) and performing QPSK demodulation on the received transport stream. With tuner, A TS to PS switching unit for converting the demodulated stream into a program stream (PS); A control unit which controls to execute WiBro when not receiving the QPSK stream; A WiBro transceiver for receiving and storing a program stream from the WiBro, When the display is performed, it is determined whether scramble exists in the program stream, and if the scramble exists, a descrambler that performs descrambling; A decoder for decoding the program stream transmitted from the TS to PS switching unit or the descrambler; A memory unit for storing the decoded broadcast signal; A display unit for displaying the decoded program stream Personal video recorder applied WiBro including. The method of claim 1, The control unit, When the program stream received from the WiBro is displayed, if the broadcast stream received from the tuner is being displayed, the personal video recorder to which the WiBro is applied is controlled to perform the display in the PIP mode. The method of claim 1, The control unit displays the program stream received from the WiBro and simultaneously controls the broadcast stream received from the tuner to be stored in the memory unit or the web, And displaying the broadcast stream received from the PVR tuner and controlling the program stream received from the WiBro to be stored in a memory unit or the web. As a personal video recorder using WiBro, Receiving a transport stream by receiving a stream modulated by Quadrature Phase Shift Keying (QPSK) of Digital Video Broadcasting-Satellite (DVB-S); Performing QPSK demodulation on the received transport stream; Converting and storing the demodulated stream into a program stream; Displaying the stored program stream; If the request for reception of the QPSK stream is not requested, executing the wibro; Receiving and storing a program stream from the WiBro, Displaying a program stream received from the WiBro; Determining whether scramble exists in the program stream when the display is performed; Performing descrambling when the scrambling exists; Displaying the descrambled program stream How to use the personal video recorder applied WiBro including. The method of claim 4, wherein When displaying the program stream received from the WiBro, if the broadcast stream received from the tuner is being displayed, using a personal video recorder applied to the WiBro characterized in that the display in the PIP mode. The method of claim 4, wherein The method, At the same time displaying the program stream received from the WiBro and storing the broadcast stream received from the tuner on a memory unit or the web; And displaying the broadcast stream received from the PVR tuner and simultaneously storing the program stream received from the WiBro on a memory unit or the web.

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