Source: http://www.google.com/patents/US6330252?dq=7650331
Timestamp: 2015-04-18 23:41:19
Document Index: 344537023

Matched Legal Cases: ['art 143', 'art 142', 'arts 144', 'arts 144', 'arts 144', 'arts 144', 'art 142', 'arts 144', 'arts 144', 'arts 144']

Patent US6330252 - Data broadcasting system for performing highspeed data transmission, data ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsIn regard to technology for broadcasting data through a transmission path, particularly, a system is provided in which a large volume of data is transmitted in a short time. On the data broadcasting side, data to be transmitted is transmitted by shifting the data in time through a plurality of transmission...http://www.google.com/patents/US6330252?utm_source=gb-gplus-sharePatent US6330252 - Data broadcasting system for performing highspeed data transmission, data broadcasting apparatus and data receiving apparatus for performing high speed data transmissionAdvanced Patent SearchPublication numberUS6330252 B1Publication typeGrantApplication numberUS 09/099,315Publication dateDec 11, 2001Filing dateJun 18, 1998Priority dateJun 24, 1997Fee statusLapsedPublication number09099315, 099315, US 6330252 B1, US 6330252B1, US-B1-6330252, US6330252 B1, US6330252B1InventorsHiroshi ShojimaOriginal AssigneeHitachi, Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (6), Referenced by (7), Classifications (12), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetData broadcasting system for performing highspeed data transmission, data broadcasting apparatus and data receiving apparatus for performing high speed data transmission
The attribute of the header portion of each block includes information, such as block start identification, data block number, block size, total number of blocks, compression method, decomposition mode, minimum receiving time and so on as shown in FIG. 5. The block start identification is information used for searching for a front end of the block in the data receiving equipment 2, and an example of using �36 of �O� and �F (16-digit)�� is shown here. The item of compression method indicates the kind of compression method used when the content of a data block is compressed, and designates a decompression method to be used in the data receiving equipment 2 when the data of the block is decompressed. The item of decomposition mode is information to designate a data transmission method, and shows the identification of whether the block is to be transmitted by a shift data transmission mode, as shown in FIG. 2(b) or FIG. 2(c) or a parallel data transmission mode, as shown in FIG. 3(a) and FIG. 3(c). The item of minimum receiving time indicates the transfer time for one block. In addition to these, the data transfer speed may be added as an attribute in order to effect synchronizing processing at the data reception time.
As shown in FIG. 10, the minimum address of the data to be transmitted in the data buffer (�0� in this case), the maximum address (�4095� in this case), the transmission mode (for example, �0� for shift data transmission, and �1� for parallel data transmission), the number of transmission paths (number of channels used; 4 channels in this case) and so on are stored in the address setting register of the address setting part 143 as the control information.
Returning to FIG. 8, in the transmission data outputting process (step 1300), the timing generating part 142 waits until the present time becomes the starting time set in the timing generating register shown in FIG. 9. If a time interval is set in the timing generating register, transmission will be by shift data transmission as shown in FIG. 2(b). Therefore, when the present time becomes the starting time, the data outputting parts 144 to 147 are sequentially started with a time interval (step 1320), the number of the data outputting parts to be started being specified by the number of channels set in the timing generating register. If a time interval is not set in the timing generating register, transmission will be by parallel data transmission as shown in FIG. 3(b). Therefore, the data outputting parts 144 to 147 are started at the same time, the number the data outputting parts to be started being specified by the number of the channels set in the timing generating register. Starting of each of the data outputting parts 144 to 147 is performed by setting to �1� a data outputting part start/end signal provided for each of the data outputting parts, as shown in FIG. 11.
Returning to FIG. 8, after each of the data outputting parts 144 to 147 has started to operate, the timing generating part 142 waits until the present time becomes the end time set in the timing setting register (step 1330), and performs the following processing when the present time becomes the end time. That is, if a time interval is set in the timing generating register, the operation is in accordance with the shift data transmission mode shown in FIG. 2(b). Therefore, the data outputting parts 144 to 147 which were started in step 1320 are instructed to end with completion of the time interval in accordance with the starting order (step 1340). If a time interval is not set in the timing generating register, the operation is in accordance with the parallel data transmission mode shown in FIG. 3(b). Therefore, the data outputting parts 144 to 147 which were started in step 1320 are instructed to end at the same time. The ending of operation of the data outputting parts 144 to 147 is performed by setting the data outputting part start/end signals corresponding to the data outputting parts to �0�, as shown in FIG. 11.
In another case where the number of channels is larger than the number of tuners, the original data can be similarly reconstituted by setting the receiving time period of the tuner to a value (number of channels/number of tuners)�(shift time between channels).
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS3726990 *May 10, 1971Apr 10, 1973Zenith Radio CorpAcoustic surface wave device for separating the luminance and chrominance signals and adjusting their delaysUS5357276 *Dec 1, 1992Oct 18, 1994Scientific-Atlanta, Inc.Method of providing video on demand with VCR like functionsUS5675509 *May 16, 1995Oct 7, 1997Brother Kogyo Kabushiki Kaisha And Xing, Inc.Data transmission deviceUS5926206 *Mar 17, 1997Jul 20, 1999Sanyo Electric Co., Ltd.Digital broadcast receiver having a time shifting functionUS5949472 *Dec 10, 1996Sep 7, 1999Intel CorporationMethod and apparatus for tuning channels for CATV and television applicationsUS6088455 *Jan 7, 1997Jul 11, 2000Logan; James D.Methods and apparatus for selectively reproducing segments of broadcast programming* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS6971121 *Mar 20, 2002Nov 29, 2005Scientific-Atlanta, Inc.Composite bufferingUS7962011Dec 6, 2001Jun 14, 2011Plourde Jr Harold JControlling substantially constant buffer capacity for personal video recording with consistent user interface of available disk spaceUS8429698Jul 30, 2008Apr 23, 2013Panasonic CorporationDigital broadcast transmission device and digital broadcast reception deviceUS8565578Dec 6, 2001Oct 22, 2013Harold J. Plourde, Jr.Dividing and managing time-shift buffering into program specific segments based on defined durationsUS8577201Feb 19, 2009Nov 5, 2013Cisco Technology, Inc.Buffering of prior displayed television channels upon accessing a different channelUS8620135Jul 3, 2007Dec 31, 2013Harold J. Plourde, Jr.Selection and retention of buffered media contentEP2175651A1 *Jul 30, 2008Apr 14, 2010Panasonic CorporationDigital broadcast transmission device and digital broadcast reception device* Cited by examinerClassifications U.S. Classification370/536, 370/390International ClassificationH04N7/173, H04H1/00, H04L12/18, H04L12/56Cooperative ClassificationH04L45/24, H04H20/42, H04H20/33European ClassificationH04L45/24, H04H20/42, H04H20/33Legal EventsDateCodeEventDescriptionFeb 7, 2006FPExpired due to failure to pay maintenance feeEffective date: 20051211Dec 12, 2005LAPSLapse for failure to pay maintenance feesJun 29, 2005REMIMaintenance fee reminder mailedJun 18, 1998ASAssignmentOwner name: HITACHI LTD, JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SHOJIMA, HIROSHI;REEL/FRAME:009265/0130Effective date: 19980603RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services