KR100238137B1 - Program specification information and addition information processing method - Google Patents

Abstract

end. The technical field to which the invention described in the claims belongs

The present invention relates to a method for processing program designation information and additional information in a satellite broadcasting receiver.

I. The technical problem that the invention is trying to solve

This solves the problem of the satellite broadcasting receiver not working properly as the amount of information to be processed in the interrupt routine increases.

All. Summary of Solution of the Invention

A storage step of storing program additional information and additional information in a memory, and searching whether the stored additional information is complete additional information when the additional information is received and stored in the memory. The additional information processing interrupt step, belonging to the main routine which drives the satellite broadcasting receiver according to a certain procedure, the program processing step of reading and processing the program designation information, and belonging to the main routine, search for the additional information flag. And the additional information processing step of reading and processing the additional information only when the additional information flag is executed.

la. Important uses of the invention

Used in satellite broadcast receivers.

Description

PROGRAM SPECIFICATION INFORMATION AND ADDITION INFORMATION PROCESSING METHOD}

The present invention relates to a satellite broadcasting system, and more particularly, to a method for processing program designation information and additional information of a receiver of a satellite broadcasting system.

The conventional analog satellite broadcasting system has a limitation in satisfying various needs of people in various aspects such as image quality and information service.

In recent years, with the development of digital signal processing technologies such as video compression technology and digital communication, satellite broadcasting has also become digital. The transmitting side of the digital satellite broadcasting system implemented according to the multiplexing and multiplexing of information and programs, and demultiplexing on the receiving side reproduced the information and various programs. Here, the transmitting side transmits various additional information such as a resource and subscriber management system (RSMS), a program guide, etc. for managing the subscriber and the system, in addition to the above information and program. In addition, the program specific information (PSI), which is information provided to demultiplex the above information, is also transmitted.

For convenience of explanation, the following will be described by taking Mugunghwa satellite broadcasting as a digital satellite broadcasting in Korea. Currently, Mugunghwa satellite broadcasting transmits subscriber management information and program guide information for subscriber management in addition to video information and audio information, and program specific information necessary for demultiplexing such information (hereinafter referred to as 'PSI'). Send.

In detail, the video is first encoded according to the ISO / IEC 13818-2 standard, which is a moving picture expert group 2 (MPEG 2) video standard, and the audio is ISO / IEC 11172-3 standard, which is the MPEG 1 audio standard, and MPEG. 2 Accepts all ISO / IEC 13818-3 standards. In accordance with this standard, in order to transmit audio and video coded in the form of a bit stream and other information through a network or satellite, according to the ISO / IEC 13818-1 standard, the MPEG 2 system standard. Packetized Elementary Stream (PES) packets are made into TS (Transport Stream). At this time, the TS is composed of packets having a constant size of 188 bytes, each packet is composed of a header of 4 bytes and a payload of 184 bytes. There is a PID (Packet ID) in the 4-byte header field. Refer to this PID to see what kind of information is contained in each payload. In addition, since multiple programs are multiplexed and transmitted, PSI, which is connection information between a program and a PID, is transmitted to select a desired program. The PSI includes connection information of a channel number and a PID so that the viewer can decode and view only the selected video and audio when switching to a desired channel.

The PSI includes a Program Map Table (PMT) and a Program Association Table (PAT). The PMT includes a PID table corresponding to video and audio streams of each program. The PAT includes a PID table of a transmission packet including PMTs of respective programs. The PAT is present in a transmission packet whose PID is always zero. Therefore, when the channel decoder or power-on, the TS decoder finds the PID of the PMT for the program that the viewer wants to watch in the PAT, and then reads and decodes the audio and video packets of the PMT.

Alternatively, there are PMT and PAT having connection information about Program Guide, Resource And Subscriber Management System (RSMS) message, and the like.

As described above, the contents of PAT and PMT vary depending on the usage environment. Accordingly, decoding of PAT and PMT information was performed in the microcomputer.

In the digital satellite broadcasting system as described above, a program guide may be periodically sent to the user. The program guide varies according to the standard, but may be a guide for the program for as many as one week from the program guide on the day. The program guide includes information such as airing time, content, and grade.

The additional information, such as the program guide, is usually handled by an interrupt because the contents of the information change periodically and the information must be processed quickly. However, as described above, when processing a large amount of information such as the program guide in the interrupt, the remote control reception is interrupted or the display time of the frame is not well processed, causing the screen to shake.

As described above, the satellite broadcasting receiver does not operate normally, such as causing a large amount of additional information to be interrupted so that the reception of the remote controller is disturbed or the display time of the frame is not processed well. There was a problem.

Accordingly, an object of the present invention is to provide a program designation information and additional information processing method for operating a satellite broadcasting system even when processing program designation information and additional information.

1 is a block diagram of a conventional satellite broadcasting receiver;

2 is a flowchart of a method of operating a satellite broadcasting receiver according to a preferred embodiment of the present invention;

3 is a flowchart of a method for processing additional information of a satellite broadcasting receiver according to an exemplary embodiment of the present invention.

According to an aspect of the present invention, there is provided a storage step of storing program designation information and additional information in a memory, and searching whether the stored additional information is complete additional information when the additional information is received and stored in the memory. An additional information processing interrupt step of applying additional information flags in the case of complete additional information, a program processing step of reading and specifying program designation information belonging to a main routine for driving a satellite broadcasting receiver according to a predetermined procedure, and And an additional information processing step of retrieving the additional information flag and reading and processing the additional information only when the additional information flag is terminated.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description and the annexed drawings, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. And a detailed description of known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

Normally, PSI information does not change the contents of the information except when a situation such as a broadcasting station or a satellite repeater occurs. Accordingly, it is not necessary to process at the time when the PSI information comes in. However, the additional information should be processed periodically as soon as the contents of the information change. As the satellite receiver processes the PSI information in the interrupt routine, the satellite receiver does not operate normally.

Accordingly, the present invention is to divide the processing of the additional information in the interrupt routine and the main routine to reduce the amount of information to be processed in the interrupt, thereby reducing the load on the satellite broadcasting receiver.

Referring now to FIG. 1, which shows a block diagram of a Mugunghwa satellite broadcast receiver as an example of a receiver for receiving a digital satellite broadcast to which the present invention is applicable, the microcomputer (MICOM) 10 performs a preset program. Each part of the receiver is controlled by. In particular, the microcomputer 10 performs a program according to the flow chart of the main routine and the flow chart of the interrupt routine, and includes a side information buffer and a PSI information buffer. The channel decoder 12 decodes the satellite broadcast reception signal corresponding to the frequency of the channel set by the microcomputer 10 and restores the TS. At this time, TS is PES packetized, and voice information, video information, subscriber management information, and program guide information are multiplexed.

The system decoder 14 is controlled by the microcomputer 10 as a transport packet decoder. The system decoder 14 descrambles and demultiplexes the TS packet output from the channel decoder 12 to decode and demultiplex audio information, video information, and subscribers. Restore and output management information and program guide information. At this time, the system decoder 14 restores and outputs the additional information packet, stores the first memory unit 16, and then causes the microcomputer 10 to perform the additional information packet interrupt.

In this case, the first memory unit 16 provides an information storage area for the system decoder 14. In particular, the first memory unit 16 includes a PSI information queue and an additional information queue for storing PSI information and additional information.

The audio information output from the system decoder 14 is applied to the audio decoder 18, the video information is applied to the video decoder 20, and subscriber management information and program guide information are provided to the microcomputer 10. The voice decoder 18 decodes the input voice information according to the voice standard used for coding and outputs the voice signal into L and R channels. The audio signal is provided to an output device and output through a speaker of the output device.

The image decoder 20 decodes the input image information according to a video standard used for coding and outputs a video signal. When the OSD video signal is applied from the OSD controller 26, the video decoder 20 mixes the input video information. The OSD controller 26 generates an OSD image signal for displaying information on the screen according to the OSD control information applied from the microcomputer 10. In this case, the second memory unit 22 provides an information storage area necessary for the image decoder 20. The video signal output from the video decoder 20 is applied to an NTSC (National Television System Committe) encoder 24 and converted into an NTSC format video signal, which is then provided to an output device and output as an image on the screen of the output device. .

The smart card unit 28 stores key information, subscriber information, viewing history information, and the like for descrambling of the system decoder 14. The modem 30 is connected to a host computer managing subscribers through a telephone line to perform modulation and demodulation for transmitting and receiving information between the host computer and the microcomputer 10. The key input unit 32 provides the microcomputer 10 with key input from a button installed in a satellite broadcasting receiver or a remote controller (REMOCON: remote controller).

When the PSI information or additional information is input to the system decoder 14 through the channel decoder 12, the system decoder 14 transmits the PSI information and the additional information to the PSI of the first memory unit 16. Store in information queue and additional information queue. In particular, when the additional information is inputted and stored in the additional information queue, the system decoder 14 instructs the microcomputer 10 to perform the additional information processing interrupt routine so that the microcomputer 10 processes the additional information. 3 is a flowchart illustrating the additional information processing interrupt. In step (68) of FIG. 3, the microcomputer 10 reads additional information stored in the additional information queue of the first memory 16 into the additional information buffer. When the read of the additional information ends, the microcomputer 10 performs step 70. In step 70, the microcomputer 10 searches whether the read additional information is complete additional information. At this time, if the read additional information is complete additional information, the microcomputer 10 performs step 72. If the read additional information is not complete additional information, the microcomputer 10 ends. In step 72, the microcomputer 10 terminates the additional information flag and terminates the additional information processing interrupt.

2 shows a main flowchart of the satellite broadcasting receiver including the PSI information and the additional information processing method according to the preferred embodiment of the present invention. Since the main flow diagram of the satellite broadcast receiver shown in FIG. 2 includes the PSI information and the additional information processing method according to the preferred embodiment of the present invention, the main flow chart of the conventional satellite broadcast receiver will be described in detail. Omit.

When power is applied to the satellite broadcasting receiver, the microcomputer 10 performs step 34 of FIG. 2. In step 34, the microcomputer 10 searches for channel locking. At this time, if the channel locking is performed, the microcomputer 10 performs step 36, and if the channel locking is not performed, step 38 is performed. In step (36), the microcomputer 10 updates the screen display ratio by searching for the screen display ratio received from satellite broadcasting every predetermined time. When the update of the screen display ratio ends, the microcomputer 10 performs step 40. In step 40, the microcomputer 10 searches whether the loop currently being executed is the first loop. At this time, the microcomputer 10 performs step (42) if the currently executing loop is the first loop, and performs step 44 if it is not the first loop. In step 42, the microcomputer 10 performs the first loop.

Here, the initial loop is a process of resetting the satellite broadcasting receiver to the set values by reading the values set before the satellite broadcasting receiver is turned off. For example, when the power of the satellite broadcasting receiver is turned on, the microcomputer 10 may set the channel of the satellite broadcasting receiver to a specific channel that the user watches before turning off the power. When the execution of the first loop is finished, the microcomputer 10 performs step (44).

In step 38, the microcomputer 10 provides the OSD controller 26 with OSD control information for displaying a channel unlocking message. The OSD controller 26 generates an OSD image signal according to the OSD control information for displaying the channel unlocking message. The OSD video signal is input to the video decoder 20. The video decoder 20 mixes and outputs the OSD video signal to the video signal. At this time, the channel unlocking message is not currently broadcasted. And so on. When the output of the channel unlocking message ends, the microcomputer 10 performs step 44. In step (44), the microcomputer 10 searches whether the power of the LNB (Low Noise Amplifier) is short-circuited. If the power of the LNB is short-circuited, the microcomputer 10 displays the OSD control information for displaying the LNB power short message. Provide to 26. The OSD controller 26 generates an OSD image signal according to the OSD control information for displaying the LNB power short message. The OSD video signal is input to the video decoder 20. The video decoder 20 mixes and outputs the OSD video signal to the video signal. At this time, LNB power short message is 'Check antenna status.' And so on. When the output of the LNB power short message ends, the microcomputer 10 performs step 46. In step 46, the microcomputer 10 receives a remote control signal through the key input unit 32 and performs an operation according thereto. When the execution of the operation according to the remote control signal is finished, the microcomputer 10 performs the PSI information processor 48. In step 50 of the PSI information processor 48, the microcomputer 10 reads the PSI information stored in the PSI information queue of the first memory 16 into the PSI information buffer. When the read ends, the microcomputer 10 performs a step 52. In step 52, the microcomputer 10 searches whether the read PSI information is complete PSI information. At this time, if the read PSI information is complete PSI information, the microcomputer 10 performs step 54. In step 54, the microcomputer 10 decodes and processes the read PSI information. After decoding and processing of the PSI information is completed, the microcomputer 10 performs step 56. In step 56, the microcomputer 10 performs remote control signal processing. When the remote controller signal processing ends, the microcomputer 10 performs the additional information processor 58. In step 60 of the additional information processing unit 58, the microcomputer 10 searches whether the additional information flag is set. At this time, the microcomputer 10 performs step 62 if the additional information flag is not present, and performs step 64 if the additional information flag is not present. In step 62, the microcomputer 10 decodes and processes additional information. After decoding and processing of the additional information is completed, the microcomputer 10 performs step 64. In step 64, the microcomputer 10 performs remote control signal processing. When the remote control signal processing ends, the microcomputer 10 performs step 66. In step (66), the microcomputer 10 searches whether the system decoder 14 and the image decoder 20 operate normally. If the system decoder 14 and the image decoder 20 do not operate normally, they are displayed. When the display ends, the microcomputer 10 performs step 34.

As described above, the present invention reduces the amount of information that the microcomputer 10 should process in the interrupt routine. That is, the additional information processing with a large amount of information simply searches for whether complete additional information has been received at the time when the additional information is received and stored. The additional information is processed in the main routine. Accordingly, the amount of information processed by the microcomputer 10 in the interrupt routine is reduced. Therefore, it is possible to prevent the microcomputer 10 from operating normally due to the large amount of information to be processed in the interrupt routine.

As described above, the present invention reduces the amount of data to be treated as an interrupt. Accordingly, there is an advantage in that the conventional microcomputer of the satellite receiver has a large amount of information to be processed as an interrupt, thereby preventing it from operating normally.

Claims (1)

In the program designation information and additional information processing method of the satellite broadcasting receiver driven according to the main procedure consisting of a series of procedures for driving the satellite broadcasting receiver, Storing the program specific information or additional information as an interrupt whenever the program specific information or additional information is received; Each time the additional information is received and stored, an interrupt is searched for whether the stored additional information is complete additional information, and if the stored additional information is complete additional information, setting the additional information flag; Reading and processing the stored program designation information, which is included in a series of procedures of the main procedure; And a step of searching for whether the additional information flag is set and reading and processing the stored additional information if the additional information flag is set, the program specified information being included in a series of procedures of the main procedure. And additional information processing methods.