Source: https://patents.google.com/patent/US8385250B2/en
Timestamp: 2019-01-17 15:42:40
Document Index: 773207980

Matched Legal Cases: ['Application No. 10', 'Application No. 60', 'Application No. 60', 'Application No. 61', 'Application No. 61', 'Application No. 61']

US8385250B2 - Digital broadcasting system and data processing method in the digital broadcasting system - Google Patents
US8385250B2
US8385250B2 US12820031 US82003110A US8385250B2 US 8385250 B2 US8385250 B2 US 8385250B2 US 12820031 US12820031 US 12820031 US 82003110 A US82003110 A US 82003110A US 8385250 B2 US8385250 B2 US 8385250B2
US12820031
US20100254318A1 (en )
This application is a continuation of U.S. patent application Ser. No. 12/234,915 filed on Sep. 22, 2008, now U.S. Pat. No. 8,089,929, which claims the benefit of and right of priority to Korean Patent Application No. 10-2008-0092423, filed on Sep. 19, 2008, and also claims the benefit of and right of priority to U.S. Provisional Application No. 60/974,084, filed on Sep. 21, 2007, U.S. Provisional Application No. 60/977,379, filed on Oct. 4, 2007, U.S. Provisional Application No. 61/044,504, filed on Apr. 13, 2008, U.S. Provisional Application No. 61/076,686, filed on Jun. 29, 2008, and U.S. Provisional Application No. 61/081,729, filed on Jul. 17, 2008, the contents of all of which are hereby incorporated by reference herein in their entireties.
Herein, j indicates the slot number within a sub-frame. The value of j may range from 0 to 15 (i.e., 0≦j≦5). Also, variable i indicates the data group number. The value of i may range from 0 to 15 (i.e., 0≦i≦15).
The major_channel_num field is an 8-bit field indicating a major_channel number of the corresponding virtual channel.
FIG. 22 illustrates an exemplary bit stream syntax structure of an MH_system_time_descriptor according to the present invention.
Since the above-mentioned timing model is not operated, the video/audio components are not synchronized with each other, such that the user may feel uncomfortable if he or she receives content data including video/audio components. In order to solve this problem, the MPEG-2 TS system defines a system time clock as the value of 27 MHz, and the video/audio components are synchronized with each other.
In accordance with contents prescribed in the MPEG-2 TS system, a transmission system, performs PCR (Program Clock Reference)-coding on a system time clock frequency, and transmits the coded result to the reception system. This PCR value indicates a transmission system time as the value of 27 MHz in a field ‘program_clock_reference_base_field’ of the MPEG-2 TS.
A baseband processor of the digital broadcast reception can recognize the beginning part and the end part of each MH frame. The end part of any one of the MH frames is equal to the beginning part of the next MH frame following the above MH frame. The baseband processor of the digital broadcast reception system is synchronized with a modulator of a digital broadcast transmission system, such that a modulator of the digital broadcast transmission system modulates each MH frame at intervals of the time 0.968 ms and outputs the resulting MH frame. Therefore, the digital broadcast reception system and the digital broadcast transmission system processes broadcast signals at intervals of a constant time, the buffer of the digital broadcast reception system can process data at a constant data rate without any overflow or underfloor. In order to allow each of the digital broadcast reception system and the digital broadcast transmission system to process data at the constant data processing rate, the digital broadcast transmission system can transmit reference time information used as a data processing reference to the digital broadcast reception system. The digital broadcast reception system(s) can receive reference time information contained in broadcast signals, and can process the received broadcast signals according to the reference time information. Accordingly, the digital broadcast reception system can process data at the same data processing rate as that of the digital broadcast transmission system, and a plurality of digital broadcast reception systems can simultaneously display the same contents. For the convenience of description and better understanding of the present invention, the reference time information at which the digital broadcast reception system is driven is called reference time information.
transmitting, at a transmitting unit, a transmission frame including a plurality of slots during which data groups of mobile data are transmitted, the mobile data being encoded through a Reed-Solomon (RS) frame, each of the data groups including a plurality of regions, each of the regions including a plurality of data blocks, each of the data blocks including contiguous Vestigial Sideband (VSB) data segments,
wherein a first region and a second region in the data group include at least three known data sequences which are spaced apart by regular VSB data segments, and the first region further includes signaling information of the mobile data in specified VSB data segments,
wherein the second channel information provides an identification number of the ensemble,
wherein the ensemble includes a first signaling table describing a service,
wherein the first signaling table includes a service map table (SMT) providing Internet Protocol (IP) address information and IP component level information for the service, and
wherein the service is signaled by hierarchical signaling information which includes ensemble access information in the second channel information and IP level service access information in the SMT.
2. The method of claim 1, wherein the SMT includes a flag indicating whether or not the IP address information is an IPv4 address.
3. The method of claim 2, wherein, when the flag is set to 0 (zero), the IP address information is an IPv4 address, and, when the flag is set to 1, the IP address information is an IPv6 address.
4. The method of claim 1, wherein each row of a payload of the RS frame includes a transport packet of the mobile data, the transport packet including an IP datagram having a network time protocol (NTP) timestamp.
receiving, at a tuner, a transmission frame including a plurality of slots during which data groups of mobile data are received, the mobile data being data encoded through a Reed-Solomon (RS) frame, each of the data groups including a plurality of regions, each of the regions including a plurality of data blocks, each of the data blocks including contiguous Vestigial Sideband (VSB) data segments,
wherein a first region and a second region in the data group include known data sequences which are spaced regular VSB data segments apart, and the first region further includes a known data sequence and signaling information of the mobile data in specified VSB data segments,
wherein the service is signaled by hierarchical signaling information which includes ensemble access information in the second channel information and IP level service access information in the SMT;
building, at a frame builder, the RS frame using the data groups included in the transmission frame; and
decoding, at a decoder, the RS frame.
6. The method of claim 5, wherein the SMT includes a flag indicating whether or not the IP address information is an IPv4 address.
7. The method of claim 6, wherein, when the flag is set to 0 (zero), the IP address information is an IPv4 address, and, when the flag is set to 1, the IP address information is an IPv6 address.
8. The method of claim 5, wherein each row of a payload of the RS frame includes a transport packet of the mobile data, the transport packet including an IP datagram having a network time protocol (NTP) timestamp.
synchronizing presentation of audio and video of the mobile data based on the NTP timestamp.
US12820031 2007-09-21 2010-06-21 Digital broadcasting system and data processing method in the digital broadcasting system Active 2029-08-12 US8385250B2 (en)
US12234915 Continuation US8089929B2 (en) 2007-09-21 2008-09-22 Digital broadcasting system and data processing method in the digital broadcasting system
US20100254318A1 true US20100254318A1 (en) 2010-10-07
US8385250B2 true US8385250B2 (en) 2013-02-26
US8098646B2 (en) * 2007-06-25 2012-01-17 Lg Electronics Inc. Digital broadcast system for transmitting/receiving digital broadcast data, and data processing method for use in the same
US8149754B2 (en) * 2007-08-24 2012-04-03 Lg Electronics Inc. Digital broadcasting system and method of processing data in digital broadcasting system
US8089929B2 (en) * 2007-09-21 2012-01-03 Lg Electronics, Inc. Digital broadcasting system and data processing method in the digital broadcasting system
US8089929B2 (en) 2012-01-03 grant
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LEE, CHUL SOO;CHOI, IN HWAN;SONG, JAE HYUNG;AND OTHERS;SIGNING DATES FROM 20081114 TO 20081119;REEL/FRAME:024569/0377