Source: http://www.google.com.hk/patents/US7849486?hl=zh-TW
Timestamp: 2013-05-21 00:56:26
Document Index: 470999605

Matched Legal Cases: ['application No. 60', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 03', 'Application No. 05', 'Application No. 06', 'Application No. 06', 'Application No. 05', 'Application No. 05', 'Application No. 05', 'Application No. 03', 'Application No. 03', 'Application No. 06', 'Application No. 03', 'Application No. 03', 'Application No. 03', 'Application No. 03']

�M�Q US7849486 - Networked subscriber television distribution - Google �M�Q�j�M �Ϥ� �a�� Play YouTube �s�D Gmail ���ݵw�� ��h »�i���M�Q�j�M | �������� | �n�J�i���M�Q�j�M�M�QA master device interactively distributes a television signal to a remote device for remote display with low latency between a user input and a television signal change....http://www.google.com.hk/patents/US7849486?utm_source=gb-gplus-share�M�Q US7849486 - Networked subscriber television distribution���}��US7849486 B2�X���������v�ӽЮѽs��10/294,947�o�G���2010�~12��7���ӽФ��2002�~11��14�� �u���v���2000�~11��14����L���}�M�Q��EP1334617A2US7861272US20090193452WO2002047388A2WO2002047388A3�o��HMichael A. GaulDavid B. LettJonathan A. RobinsonSamuel H. Russ��M�Q�v�HScientific-Atlanta, Llc ���M�Q������725/74725/83725/82725/78725/81725/80��ڱM�Q������H04L29/06H04N7/18H04N5/445H04N5/00 �X�@����H04L29/06462H04N21/434H04N21/4113H04N21/43615H04N21/47H04N21/4622H04L29/06027H04N21/440254H04L29/06469H04N21/4383H04N21/43637 �ڬw������H04L29/06M4S6H04L29/06M4S4H04L29/06C2H04N21/4402QH04N21/4363WH04N21/462SH04N21/41P2H04N21/436HH04N21/438TH04N21/434�ѦҤ��m�M�Q�ޥ� (105)�D�M�Q�ޥ� (200)�Q�H�U�M�Q�ޥ� (3)�~���s�����M�Q�ӼЧ� ���M�Q�ӼЧ��M�Q����T�� �ڬw�M�Q��Networked subscriber television distributionUS 7849486 B2�K�n A master device interactively distributes a television signal to a remote device for remote display with low latency between a user input and a television signal change.
CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of U.S. patent application Ser. No. 10/008,581, entitled ��Networked Subscriber Television Distribution, which was filed on Nov. 13, 2001, which claims the benefit of provisional patent application No. 60/248,485, entitled ��Wireless Remote Display Settop Box�� filed on Nov. 14, 2000, both of the teachings of which are entirely incorporated herein by reference.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the invention now will be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Furthermore, all ��examples�� given herein are intended to be non-limiting.
At the physical layer lies the radio technology. The wireless ethernet devices 110, 112 operate in the 2.4 GHz Industrial, Science and Medical (ISM) band according to a direct sequence spread spectrum (DSSS) protocol. The band varies slightly internationally, but was chosen in part because it does not require licensing in the countries in which it is recognized. The DSSS divides the bandwidth into 14 22-MHz channels, all but three of the channels slightly overlapping the adjacent channels. Data is sent directly across one channel. Noise compensation is allowed through a method called ��chipping,�� whereby each bit of data is converted into a set of redundant bit patterns, called ��chips.�� This redundancy, along with spreading the signal out over 22 MHz, provides a sort of error checking and correction that can recover data in many instances without necessitating retransmission.
Referring now to FIG. 2, a block diagram of one example of the integrated master set top box 160 of the wireless system can be seen. First, a cable signal 15 from the headend service provider 1 is introduced into the master set top box 160 through a communications interface 205 that can, preferably, direct data in both directions, to and from, the headend service provider 1. The incoming cable signal 15 arrives at a tuner 210, which filters out the unwanted source signals (i.e. television stations/programs or channels) and tunes to a selected television signal, decoding and/or de-scrambling the television signal coming into the master set top box 160, as necessary. In some embodiments the tuner 210 will also include a demultiplexor because the tuned signal actually contains several different ��programs,�� or television signals, multiplexed into the same tuned program stream. A demultiplexor would select the particular station, or television signal, from the channel or program stream that has been tuned.
The H.263 standard also uses the discrete cosine transform (DCT) to compress the image. In the H.263 standard, a two-dimensional DCT is applied to 8��8 blocks of pixels in the image to be compressed. The coefficients that are achieved are then quantized. This quantization is where the compression actually takes place. Many of the coefficients are very small, and thus become zeros after being quantized. Moreover, the larger DCT coefficients correlate to higher frequency signals. The human eye, however, is less sensitive to high frequency deviations, and therefore, a high quantization factor can be used on these coefficients without sacrificing much in terms of video quality. Thus a large DCT coefficient can effectively be made smaller in order to achieve a higher compression ratio.
The H.263 standard then uses run length encoding to compress the quantized DCT coefficients. Run length encoding encodes a series of consecutive pixels containing the same color as a single codeword. For example, if a series of data contained twelve zeros, the runlength encoding would merely transfer something such as ��12 0��, rather than transferring twelve separate zeros, ��000000000000.�� Clearly the first method of transferring the number of repeaters and the number repeated takes up less bandwidth than transferring the whole series of numbers. Thus, the compression ratio can be fairly high in situations where there are like color pixels located adjacent to one another.
However, in this embodiment of a screen remote control, the user interface 335 may recognize two events based upon the user's actions that will be embodied in the control signal. If, for example, the user presses the channel up button, the first event will be the button being depressed, which will be sensed by the user interface. Then the user interface 335 will create a ��channel up pressed�� control signal. The ��channel up pressed�� control signal is then sent to the master set top box 160. The second event recognized by the user interface occurs when the user releases the button after some period of time. This event will cause the user interface to create a ��channel up released�� control signal. This event control signal is then sent to the master set top box 160.
In a conventional infrared remote, this configuration would not be very effective, since there is no guarantee that the ��channel up released�� signal would be sensed at the set top box. Thus with that configuration, the set top box would continue to scroll through program streams indefinitely until it receives a release signal. However, since the protocol used for almost all forms of networking creates an acknowledgment of the receipt of the signal, the ��release�� signal is more likely to eventually reach the master set top box 160 in this embodiment. Thus, the master set top box 160 will not continue to scroll through program streams indefinitely after the button has been released.
Referring now to the reception of the remote commands at the master set top box 160. First, the master set top box 160 senses whether or not a control signal has been received from the remote set top box 170. Then, after the signals are received by the master set top box 160, the master set top box 160 sends them to the navigator 265 through the controller 230 asking that the command be performed or passed on to an application, such as a WatchTV application. The function requested most often is a channel change, although the remote control can contain a plurality of other commands such as, for example, among others, volume change, program guide request, ��Pizza on Demand��, menu request, etc. In the case where the function is a channel change, the controller 230 would in turn cause the first tuner 210 to perform a channel change by tuning the program stream requested. Additionally, if no ��button released�� signal is received at the master set top box 160 for a period of time after a ��button pressed�� signal is received, the navigator 265 will decide that the user intends to signal a second remote operation corresponding to the first command, and perform the operation accordingly. The navigator 265 continues making this decision to repeat until the button is finally released, and the button-release message is received.
In interpreting the word ��button�� used in regard to the remote control, a person skilled in the art would recognize that there is no requirement that the ��button�� be a physical button. Rather, the ��button�� can be an screen button, such as a touch screen button or a button clickable by a mouse, or any other structure that can sense a user input. Furthermore, it should be clear to one skilled in the art that a normal infrared remote can be used in conjunction with the electronic remote in relaying the infrared signal in the same manner as described above. This can be accomplished through the attachment of an infrared sensor at the remote set top box with almost identical characteristics.
The search engine could employ any or all of the methods described above, and perform the methods in any order, such that a website associated with a program or channel can be located. In the case where there is no website found through the Internet search, through the lookup table or on the BFS signal, the browser could continue to browse the current website or automatically redirect to a ��home�� website that has been defined by the user or is hardwired into the software.
The aforementioned programs and software, which comprise an ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. In the context of this document, a ��computer-readable medium�� can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. The computer readable medium can be, for example but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, device, or propagation medium. More specific examples (a nonexhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic) having one or more wires, a portable computer diskette (magnetic), a random access memory (RAM) (electronic), a read-only memory (ROM) (electronic), an erasable programmable read-only memory (EPROM or Flash memory) (electronic), an optical fiber (optical), and a portable compact disc read-only memory (CDROM) (optical). Note that the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
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