Patent Application
20050282524
There are no previously filed, nor currently any co-pending applications, anywhere in the world.
1. Field of the Invention
The present invention relates generally to radio data system and, more particularly, to a digital radio based text messaging system using an In-Band On-Channel (IBOC) Digital Audio Broadcasting systems approach to deliver new digital services simultaneously with audio for receiving location specific traffic or weather information.
2. Description of the Related Art
In-Band On-Channel (IBOC) Digital Audio Broadcasting systems bring the benefits of digital audio broadcasting to today's radio while preventing interference to the “host” analog station and stations on adjacent channels. Referred to as high definition radio (HD Radio), this technology delivers new digital services simultaneously with the existing analog broadcast. These new digital signals are broadcast as “sideband” transmissions bracketing the top and bottom of the current “host” analog signal in order to make optimal usage of the current spectrum allocations. With more than half of stations currently facing interference from adjacent stations, this approach delivers redundant information on both sides of the current channel location in order to ensure optimal performance in all listening environments.
IBOC technology further combats interference through a unique First Adjacent Canceller (FAC) technology. FAC automatically differentiates between the digital sideband transmission and other analog signals that might be closely adjacent to the channel in order to suppress the interfering station.
IBOC technology overcomes multipath interference and sources of noise through the use of coding and power combining techniques. This approach to error correction utilizes digital processors and powerful algorithms to constantly compare the quality of the two digital sideband transmissions, combining them to deliver additional power gain whenever possible and when not possible seamlessly switching to the more powerful of the two.
In much the same way that a portable CD player digitally stores a short passage of music in order to overcome any momentary interruptions, the interleaver approach incorporated into IBOC technology further enhances performances. By “caching” or storing the broadcast into short-term memory, the interleaver allows for the uninterrupted transition between analog and digital signal within the same channel in order to avoid the drop off that might occur due to a bridge or other obstruction. In order to deliver instantaneous tuning, the interleaver also seamlessly enables the initial selection of the analog signal and subsequent transition to the digital signal once properly cached. Compression of audio data will increase transmission without losing sound quality.
By employing the above techniques incorporating multiple digital signal techniques, such as redundant sidebands, blend, first adjacent cancellation, and code and power sharing, IBOC technology is designed to capture a superior robust signal within a station's coverage area in order to ensure delivery of the benefits of HD Radio technology.
IBOC provides a unique opportunity for broadcasters and consumers to transition from analog to digital broadcasting without service interruption while maintaining the current dial positions of existing radio stations. Consumers who purchase digital radios will receive their favorite AM and FM stations with superior digital quality, free from the static, hiss, pops and fades associated with analog radio reception. In addition to offering digital audio quality and crystal clear reception, IBOC offers the broadcaster the lowest entry cost into the wireless data industry. Through careful attention to the equipment decisions made today, broadcasters may significantly reduce the cost of conversion.
In the prior art, travel information with RDS is possible using the Travel Program (TP) and Travel Announcement (TA) flags. Information is broadcast for motorists, identified in parallel with the ARI system with the corresponding RDS features TP/TA. But ARI is being replaced on a European scale, so it will cease after the year 2005. A more recent development of RDS is the digitally coded Traffic Message Channel (TMC) which is now planned to be introduced all over Europe, within projects funded by the European Union. However, present RDS radios are not yet suitable for RDS-TMC for use in the United States.
Consequently, a need has been felt for providing a method of providing real time traffic information via text messaging utilizing HD radio based real time text messaging system using In-Band On-Channel (IBOC) Digital Audio Broadcasting systems.
It is therefore an object of the present invention to provide an improved radio based data messaging system.
It is a feature of the present invention to provide real time traffic message control delivered using In-Band On-Channel (IBOC) Digital Audio Broadcasting systems.
Briefly described according to one embodiment of the present invention, a data messaging system is provided utilizing In-Band On-Channel (IBOC) Digital Audio Broadcasting systems enabled to transmit and receive location specific traffic, weather, emergency alert, and/or other third party application information. An extensible markup language (XML) is used to enable an “information grid” to provide processing capabilities of HD IBOC capable FM radios. Utilization of XML technology will allow display of various applications that are language independent, particularly, real time data messaging of traffic messages generated as XML output.
In accordance with a preferred embodiment, a radio based data messaging system can be created using HD IBOC receivers for receiving location specific information.
An advantage of the present invention is that it can be adapted for use with a variety of location specific information, such as weather, traffic, emergency alert, or third party application information or the like, without significant hardware modification.
Another advantage of the present invention is that it can develop eventual text messages from any existing third party information stream.
Yet another advantage of the present invention is that it utilizes XML technology will allow text display of various applications that are language independent.
Yet another advantage of the present invention is that it can be used to enable a new information transmission grid.
Yet another advantage of the present invention is that it is capable of being nationally coordinated, but locally distributed.
Further, a preferred embodiment of the present invention has the capability of being the foundation for a more specific data messaging system implemented using a vehicle located FM receiver as the text display mechanism.
The advantages and features of the present invention will become better understood with reference to the following more detailed description and claims taken in conjunction with the accompanying drawings, in which like elements are identified with like symbols, and in which:
In order to describe the complete relationship of the invention, it is essential that some description be given to the manner and practice of functional utility and description of radio broadcast data system (RBDS). The standards for this system are best described in the “United States RBDS Standard” by the National Radio Systems Committee of the National Association of Broadcasters, as described in USPTO form PTO-1440 and incorporated by reference herein as if fully rewritten.
The best mode for carrying out the invention is presented in terms of its preferred embodiment, herein depicted within the Figures.
1. Detailed Description of the Figures
Referring now to
By way of example, but not as a limitation, in a traffic reporting scenario a location code representing the interchange of Interstate 95 and Interstate 295 would be given a fixed location code, with reportable events corresponding to real-time activity at that location being selected from a pre-determined table incorporating a comprehensive list of reportable events. These can include “lane closures”, “accidents”, “disabled vehicles” or other type of obstructions, as well as link impedance determinations such as “traffic at 30% capacity” or “traffic moving at 45 mph” type of standard Traffic and Traveller Information (TTI). Once the data is enabled for use 16 into linked event codes and location codes, it is reformatted to be accommodated by the transport infrastructure 18. Next, the reformatted data is inserted into the radio transmission stream 20 for transmission within the HD Radio envelop, or otherwise adapted for the IBOC or other particular transportation infrastructure.
Finally to the general description of the present invention, the receiver 12 that is enabled to receive data transmitted is modified to give meaning to the received data. This is accomplished by adding within its memory a lookup table storing the pre-determined comprehensive list of reportable event codes as well as adding within its memory a lookup table storing a pre-determined required list of location codes. It is assumed that this can be accomplished by use of CD, DVD, RAM, ROM, Flash or any other conventional method for providing memory storage retrievable by the radio's microprocessor.
By encoding these lookup tables, the radio will be able to interpret and display meaningful data transmissions.
2. Operation of the Preferred Embodiment
In accordance with a preferred embodiment of the present invention, as shown in
The foregoing descriptions of specific embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims appended hereto and their equivalents. By way of example, and not as a limitation, it is anticipated that the present method can be adapted or modified for receiving alternate text data by utilizing an extensible markup language (XML) to enable the existing hardware capabilities of high definition digital capable radios. Utilization of XML technology will allow display of various applications that are language independent, particularly, real time data messaging of traffic messages generated as XML output.
Therefore, the scope of the invention is to be limited only by the following claims.
