Patent Application
20100328545
The present invention generally relates to a receiver system and method thereof, and more particularly, to a receiver system and method thereof for providing a content output based upon a channel previously received, while receiving another channel.
Generally, the Advanced Television Systems Committee (ATSC) document number A/153 is a candidate standard from the ATSC, named the ATSC-M/H Standard, and commonly referred to as the Mobile Digital Television (Mobile DTV) Standard. The standard is generally intended to add extra robustness to the existing ATSC Digital Television Standard, Document A/53 to allow for improved performance in the presence of Doppler and multipath conditions as observed in a mobile environment. Typically, an M/H service and all necessary signaling information are to be carried within, and without interfering with, the legacy standard, at determinant intervals that are provided from data carried within the ATSC-M/H system. By knowing when wanted packets are to be received, power moding of receivers can be utilized to conserve power.
It is generally not easy for the candidate standard to determine what channels are available for a specific receiver at a specific geographic location. The current method for determining channel availability typically requires a scan of all applicable frequencies for M/H content; a process that is very time consuming. The available channels can also change rapidly as the user's geographic location and reception environment change. Typically, another channel scan is then required to discover these changes, which interrupts the user's experience.
In accordance with one aspect of the present invention, a receiver system includes at least one antenna configured to receive a plurality of channels, each channel of the plurality of channels being at a different frequency and a tuner in communication with the at least one antenna, wherein the tuner is configured to receive a first channel of the plurality of channels at a first frequency during a first period of time, at least a second channel of the plurality of channels at a second frequency during a second period of time, and provide a content output based upon only the first channel substantially without interruption during both the first and second periods of time.
According to another aspect of the present invention, a receiver system used with a vehicle includes at least one antenna configured to receive a plurality of Advanced Television Systems Committee M/H A/153 (ATSC-M/H A/153) channels, each channel of the plurality of channels being at a different frequency and comprising a plurality of data slots and a tuner in communication with the at least one antenna, wherein the tuner is configured to receive a first channel of the plurality of channels at a first frequency during a first period of time that corresponds to a time period of at least a first data slot of a plurality of data slots of the first channel, at least a second channel of the plurality of channels at a second frequency during a second period of time, that corresponds to a time period of at least a second data slot of a plurality of data slots of the first channel, providing a content output based upon only the first channel substantially without interruption during both first and second periods of time, and return to receiving the first channel after the second period of time expires.
According to yet another aspect of the present invention, a method of receiving a broadcast to provide a content output is provided, the method including the steps of receiving a plurality of channels, each channel of the plurality of channels being a different frequency, tuning to a first channel of the plurality of channels at a first frequency during a first period of time, tuning to at least a second channel of the plurality of channels at a second frequency during a second period of time, and providing a content output based upon only the first channel substantially without interruption during both the first and second periods of time.
These and other features, advantages and objects of the present invention will be further understood and appreciated by those skilled in the art by reference to the following specification, claims and appended drawings.
The present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
In regards to both
Thus, the receiver system can receive the second channel to determine if content, what content, or a combination thereof, is being broadcast on the second channel during a second period of time, without interrupting the content output that is provided based upon the first channel. The first channel received during at least the first time period is an adequate amount of data to continue providing the content output even during the second time period. Therefore, the receiver system 100 can determine if content, what content, or a combination thereof, is being broadcast on the one or more channels other than the first channel prior to being specifically instructed by a user to change from the first channel to receiving the second channel (e.g., a user changing channels to switch to a different program).
Typically, when the receiver system 100 waits until specifically instructed by a user to switch channels, there is a time delay where the receiver system 100 changes to a different channel and determines if content, what content, or a combination thereof, is being received prior to being able to provide a content output to the user. It should be appreciated by those skilled in the art that the phrases first time period and second time period are exemplary phrases for identifying and distinguishing time periods, and that these time periods may include the time periods when one or more data slots are being received. It should further be appreciated by those skilled in the art that there may be more than two time periods, and that the first and second time periods are described herein for purposes of explanation and not limitation.
According to one embodiment, the broadcast is an ATSC-M/H A/153 broadcast. Typically, each of the plurality of channels of the broadcast includes a plurality of data slots (e.g.,
The timing information can include information that corresponds to a time period for which a slot is being received, such that the tuner 104 can perform a scan of different channels during a known period of time (e.g., the second period of time). Typically, the time period for each data slot is substantially the same, but the number of data slots forming the parade can be different. The tuner 104 can receive this timing information to determine the length of time the tuner 104 can scan the other channels.
Typically, the tuner 104 returns to receiving a first channel after the second period of time expires. According to one embodiment, the tuner 104 re-synchronizes with the broadcast when returning to receive the first channel prior to the second period of time expiring. The re-synchronization can be based upon the timing information received by the tuner 104 via the signaling information or data carried within the ATSC-M/H system. The tuner 104 can be a single tuner, such that the provided content output is based upon the signal being received and processed by the single tuner. However, it should be appreciated by those skilled in the art that more than one tuner 104 can be used to receive the signal.
According to another embodiment, the tuner 104 can be activated to turn-off during a second period of time, by receiving an instruction from a user by an input device 108. Additionally or alternatively, the receiver system 100 can be used with a vehicle. Typically, the vehicle is considered to have a greater amount of electrical power to supply to the system 100 when compared to the system 100 being used with a handheld mobile device. Thus, when the system 100 is powered by the vehicle, the user can instruct the tuner 104 to receive the second channel during the second period of time rather than turning off to conserve power.
For purposes of explanation and not limitation, when the system 100 is being used with a vehicle, the tuner 104 can receive the first channel (e.g., slot #0) during the first period of time (e.g., channel decoder status ON) (
In such an exemplary embodiment, the system 100 is used with a vehicle, and can continuously monitor the content of the different channels (e.g., the background scanning). The background scanning can be advantageous because the content of the channels can vary based upon geographical location (e.g., local broadcast of channels). Therefore, as the vehicle is travelling through different geographical areas, the system 100 can continuously be conducting background scans to determine if content is available in the non-current channels.
By way of explanation and not limitation, in regards to
In an embodiment wherein the broadcast is an ATSC-M/H A/153 signal, the M/H data is typically transmitted in a bursty manner. The data to be received is contained in a known parade (i.e., one or more data slots), and each parade is received at times discovered from the M/H data (e.g., the signaling information). When the data being received by the system 100 is not relevant to the output 106, the tuner 104 tunes to other frequencies to determine the M/H availability. When the parade of interest (POI) is to be received, the tuner 104 re-tunes to the appropriate channel with adequate time to re-synchronize with the transmission. Thus, the single tuner 104 can be used to receive a desired data, while also discovering other available data and providing local data (e.g., local television stations) availability.
In regards to
If it is determined at decision step 305 that there is not a need to receive channel information, then the method 300 proceeds to step 308, wherein it is determined if the POI is being received. At decision step 310, it is determined if the next POI time minus the tune time minus the current time is greater than a scanned time plus a tune time. If it is determined at decision step 310 that the next POI time minus the tune time minus the current time is not greater than the scanned time plus the tune time, then the method 300 returns to step 304. However, if it is determined at decision step 310 that the next POI time minus the tune time minus the current time is greater than the scanned time plus the tune time, then the method 300 proceeds to step 312. At step 312, the tuner 104 tunes to another channel and scans for content availability. The method 300 can then return to decision step 310, or end at step 314. Typically, the method 300 continuously loops until electrical power is no longer supplied for the system 100, or if the user of the system 100 instructs the tuner to power down during the second period of time rather than performing a background scan, or if the user of the system 100 instructs the tuner to tune to another channel.
Advantageously, the system 100 and method 300 can be used to determine if and/or what content is being broadcast on different channels during periods of time without interrupting the output to the user, which reduces a time delay when a user does decide to select a different channel for emitting an output. Further, the system 100 and method 300 utilize the ATSC-M/H A/153 signal properties, which are used for mobile devices to power down to conserve power to obtain this additional information. It should be appreciated by those skilled in the art that additional or alternative advantages may be present based upon the system 100 and method 300. It should further be appreciated by those skilled in the art that the above-described elements can be combined in alternative ways that are not explicitly described herein.
Modifications of the invention will occur to those skilled in the art and to those who make or use the invention. Therefore, it is understood that the embodiments shown in the drawings and described above are merely for illustrative purposes and not intended to limit the scope of the invention, which is defined by the following claims as interpreted according to the principles of patent law, including the doctrine of equivalents.
