KR20070018253A - Method for updating software using return channel in a digital broadcasting receiver - Google Patents

Abstract

The present invention relates to a software update method using a return channel of a digital broadcast receiver. That is, the present invention provides a signaling method for updating software in a data broadcasting receiver using a return channel, and by using an optional field in the SD descriptor, it is possible to find out the case where S / W download signaling for the current system is unnecessary only by receiving PMT. For example, since the S / W section does not need to perform section filtering, a more efficient software update download can be performed when the software is updated in the digital broadcast receiver having a return channel.

Return Channels, Digital Broadcast Receivers, Software, Updates

Description

Software update method using return channel of digital broadcasting receiver {METHOD FOR UPDATING SOFTWARE USING RETURN CHANNEL IN A DIGITAL BROADCASTING RECEIVER}

1 is a system configuration diagram between a broadcasting station and a digital broadcasting receiver to which an embodiment of the present invention is applied;

2A to 2B are flowcharts of a software update process using a return channel in a digital broadcast receiver according to an embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a software update method of a digital broadcast receiver, and more particularly, using a return channel that can perform software download more efficiently by using a software download (SD) descriptor in a digital broadcast receiver. The software update method.

As is well known, digital broadcast receivers are shipped with suitable programs built in at the time of product release. In this case, the program is for controlling the operation of the digital broadcast receiver and the user, such as a user interface, or the digital broadcast receiver itself, and it is necessary to update the program to improve the performance according to the change of the use environment.

In order to update the software of the digital broadcasting receiver, the serviceman of the manufacturer who manufactures the digital broadcasting receiver may update the software directly, or the user may download and update the software by accessing the manufacturer's website or the like. Including the software, the broadcast receiver itself extracts the software from the transmitted broadcast signal and automatically updates the software.

The method of extracting updated software included in the broadcast signal and updating the software of the receiver is called over air download (hereinafter referred to as OAD). A software upgrade method of the over-air download type digital broadcast receiver will be described in more detail with reference to FIG. 1.

Manufacturers of digital broadcast receivers offer upgraded software for their digital broadcast receivers encoded in the OC protocol (Object Carousel protocol). The OOC-encoded stream is thus multiplexed with the broadcast stream of the broadcasting station 10 and the data stream for data broadcast and program index.

Then, the stream transmitted from the broadcasting station is received by the digital broadcast receiver 30 of the user through the repeater 20 to extract the updated software included in addition to the broadcast signal to update the software. Such a conventional software update method transmits an update image through a protocol called a date carousel through in-band.

However, this conventional method cannot use a lot of bands because it uses in-band. As a result, the reception time of the update image becomes long, and the reception may be stopped due to the channel conversion of the user. For the same reason, there is a problem that it is not easy to continue carouseling a large file of each company. In this case, a person who does not watch the channel at that time does not receive an update of the receiver.

To this end, define Software Download Descriptor in PMT, Software Download Section to be transmitted through ES (Elementary Stream) for private section, and here, using only mandatory item, Software Download through Return Channel Although methods for realizing signaling have been proposed, in the software update download method using the SD (Software Download) descriptor as described above, the S / W download signaling is not necessary only by receiving the PMT. There was a problem that / W downloads occur frequently.

Accordingly, an object of the present invention is to provide a software update method using a return channel that can more efficiently download software using an SD descriptor in a digital broadcast receiver.

The present invention for achieving the above object, as a software update method using a return channel of the digital broadcast receiver, (a) receives the transport stream to extract the PMT to determine whether the SD (Software Download) descriptor in the PMT exists; (B) extracting an optional field for software update in the SD descriptor; and (c) checking whether org_id in the SD descriptor optional field is equal to the lower 16-bit value of the receiver H / W OUI. (D) if a version value corresponding to org_id in the SD descriptor optional field is a higher version than a version value of the receiver, whether there is an update item matching the receiver among the compatibility descriptors in the loop in the corresponding SD subtable; (E) if there is an update item matching the receiver in the loop; Byte and performing a software download server connected to the address, (f) and the internal variable version during the downloading complete, it characterized in that it comprises the steps of set equal to the version value received from the signaling descriptor SD.

Hereinafter, with reference to the accompanying drawings will be described in detail the operation of the preferred embodiment according to the present invention.

2A to 2B illustrate a control flow of a software update signaling operation in a data broadcast receiver using a return channel according to an embodiment of the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2A and 2B.

First, the user digital broadcast receiver 30 is a transport stream in which an image, audio, and additional information to be transmitted in digital broadcasting are multiplexed in time (S200). After receiving the stream and extracting the PMT (Program Map Table), in step S202 it is checked whether a software download descriptor (SD descriptor) exists in the PMT.

In this case, when the PMT extraction result has the SD descriptor, the digital broadcast receiver 30 checks whether the optional descriptor in the SD descriptor exists in step S204 by checking whether the length of the SD descriptor is greater than zero.

If the length of the SD descriptor is greater than zero, and it is checked that there is an optional field in the SD descriptor, the digital broadcast receiver 30 checks the H / W OUI of the set top in the optional field in step S206. Checks whether the same org_id as the lower 16 bits exists. At this time, if the same org_id does not exist, the update for the corresponding set-top does not exist and the digital broadcast receiver 30 terminates the software update.

However, if the same org_id exists, the digital broadcast receiver 30 checks whether a version value corresponding to its org_id in the corresponding SD descriptor is higher than the version value it has in step S208. . At this time, if it does not go higher than the version value that it has, even if there is an update for the set-top, the set-top is already updated or irrelevant because the digital broadcast receiver 30 is a software update (Software update) To exit.

However, if the version value corresponding to its org_id is increased, the digital broadcast receiver 30 proceeds from step S208 to step S210, in which the private section pid of the PMT and the lower 16 bits of the OUI of the set H / W are used. Monitoring is performed using the table id extension, and the corresponding elementary stream (ES) is monitored in step S212 to receive a subtable corresponding to org_id in the software download section.

Then, the digital broadcast receiver 30 matches the set top among hardware descriptors (S / W) and S / W in the compatibility descriptor in a loop in the received SD subtable (S214). (Software) Checks for items such as OUI, version, and model.

In this case, when there is no item that matches the set-top among the compatibility descriptors in the loop, the digital broadcast receiver 30 proceeds to step S216 and sets the internal variable version equal to the version value signaled by the SD descriptor.

However, if it is checked that there are items such as H / W and S / W OUI, version, model, etc. that match the set-top among the compatibility descriptors in the loop, the digital broadcasting receiver 30 proceeds from step S214 to step S218. In the loop, it connects to the server address corresponding to the matching compatibility descriptor and downloads it.

Subsequently, the digital broadcast receiver 30 checks whether the software update download has been successfully performed in step S220, and if successful, proceeds to step S222, and the internal variable version is converted into a version value signaled from the SD descriptor. Set the same.

As described above, in the present invention, in a signaling method for updating software in a data broadcasting receiver using a return channel, the S / W download signaling for the current system is unnecessary even by receiving a PMT using an optional field in the SD descriptor. By detecting the case, it is not necessary to perform section filtering on the S / W section, so that a more efficient software update download can be performed at the time of software update at the digital broadcast receiver having the return channel.

Meanwhile, in the above description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the invention should be determined by the claims rather than by the described embodiments.

As described above, the present invention provides a signaling method for updating software in a data broadcasting receiver using a return channel, wherein an S / W download signaling for a current system is unnecessary only by receiving a PMT using an optional field in an SD descriptor. Since it is possible to find out, it is not necessary to perform section filtering on the S / W section, and there is an advantage that a more efficient software update download can be performed at the time of software update in a digital broadcasting receiver having a return channel.

Claims (3)

A software update method using a return channel of a digital broadcast receiver, (a) receiving the transport stream and extracting the PMT to check whether there is a software download (SD) descriptor in the PMT; (b) extracting an optional field for software update in the SD descriptor; (c) checking whether org_id in the optional field of the SD descriptor is equal to the lower 16-bit value of the receiver H / W OUI; (d) if a version value corresponding to org_id in the optional field of the SD descriptor is higher than a version value of the receiver, checking whether there is an update item corresponding to the receiver among the compatibility descriptors in the loop in the corresponding SD subtable; , (e) if there is an update item that matches the receiver in the loop, accessing the update server address of the item to perform a software download; (f) setting the internal variable version equal to the version value signaled by the SD descriptor when the download is completed; Software update using the return channel of the digital broadcast receiver. The method of claim 1, The updating item in step (d) includes the H / W and S / W OUI, version, and model information of the receiver. The method of claim 1, The location information of the software update server is a software update method using a return channel of a digital broadcast receiver, characterized in that provided as URL information on the web.

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