摘要:
A personal object or obstacle detector apparatus comprises a continuous transmission frequency modulation (CTFM) ranging system and an audio output device. The CTFM ranging system transmits a frequency-swept pressure wave, receives a reflected frequency-swept pressure wave from at least one object, and forms an audio signal based upon a frequency difference between the frequency-swept pressure wave and the reflected frequency-swept pressure wave the audio signal having an amplitude dependent upon size of the object. The audio output device produces an acoustic pressure wave in dependence upon the audio signal. In a preferred embodiment, the acoustic pressure wave contains separate tones for each of the objects detected, wherein each tone has a pitch dependent upon the distance from the CTFM ranging system to the corresponding object. Another embodiment utilizes a pair of CTFM ranging systems to produce a stereo auditory map of objects and obstacles.
摘要:
A personal object or obstacle detector apparatus with enhanced stereo imaging capability includes a sonar system having dual receivers with field lobes positioned based on psychoacoustic considerations such as interaural intensity difference (IID) and interaural time difference (ITD). Receiver field pattern shapes and directions are selected to match the natural IID and ITD associated with human hearing. In one embodiment, dual receivers are used with a common transmitter while another embodiment utilizes two transmitter/receiver pairs with the transmitter and receiver collocated.
摘要:
A position detection system for locating an object including a magnetic field generator is disclosed. The position detection system also includes an array of parallel conductors responsive to a magnetic field generated by the magnetic field generator and a plurality of receivers each associated with a parallel conductor. The parallel conductors are spaced apart from one another by a substantially constant spacing. Each receiver has an associated gain, and the gains of the receivers are configured to simulate voltages induced in conductor loops of sinusoidally-varying pitch.
摘要:
A system and method for detecting the position of an object are disclosed. A position detection system for locating an object including a resonator comprises an array of parallel conductors responsive to the magnetic field from the resonator, and a plurality of receivers each associated with a parallel conductor. The array of parallel conductors is configured to locate the object along a measurement path. The array of parallel conductors is orthogonal to the measurement path. The system further comprises a plurality of drivers each associated with a parallel conductor and configured to drive current through to produce an energizing field. The array of parallel conductors is provided with sinusoidally varying spacing and driven with sinusoidally varying current. In another embodiment, the array of parallel conductors is provided with constant spacing, and the receivers are configured with gain factors to produce reception similar to reception by sinusoidally spaced conductors. The array of parallel conductors may be driven with three-phase currents to eliminate stationary null points in the energizing field along the lengths of the parallel conductors. A method of detecting position of an object including a resonator comprises providing an array of parallel conductors, providing a plurality of receivers, and associating each of the receivers with a parallel conductor.
摘要:
A method for displaying interactive advertisements on a television having a controller connected thereto and configured for receiving input from a viewer of the television is disclosed. The controller has a receiver operable to receive advertisements and a processor operable to modify the advertisements. The method generally comprises requesting action by the viewer of the television, modifying an advertisement based on the action of the viewer, and displaying the modified advertisement on the television.
摘要:
A system, method, and computer program product are provided for temporal video compression. In use, portions of video are buffered in a first order. Further, the portions of video are at least partially temporally compressed in a second order. Another system, method, and computer program product are further provided for compressing video from a plurality of sources. In use, video is received from a plurality of sources. Such video from the sources is then compressed. Such compression is carried out using a plurality of rate controls. In various embodiments, the video may be received by way of a single video stream, and/or the compression may be carried by way of a single compression module.
摘要:
A system and method are provided for compressing data. Initially, data is received in a single device. Such data is encoded utilizing the single device to generate first compressed data in a first format. Moreover, the first compressed data is transcoded utilizing the single device to generate second compressed data in a second format.
摘要:
A method for displaying interactive advertisements on a television having a controller connected thereto and configured for receiving input from a viewer of the television is disclosed. The controller has a receiver operable to receive advertisements and a processor operable to modify the advertisements. The method generally comprises requesting action by the viewer of the television, modifying an advertisement based on the action of the viewer, and displaying the modified advertisement on the television.
摘要:
A stream of time-ordered data, such as a movie, is divided into multiple fragments of equal length, which are repetitively transmitted at different respective repetition rates. The fragments are reordered for transmission so that those which occur near the beginning of the original data stream are transmitted more frequently than those which occur later in the data stream. When a user enters a request to utilize the data, the individual fragments are stored upon receipt at the user's premises, and reassembled into a contiguous stream. The ordering of the fragments is such that the wait time required before utilization of the data can begin is limited to a predetermined maximum, and at least one copy of every fragment becomes available by the time it is needed.
摘要:
A method for displaying interactive advertisements on a television having a controller connected thereto and configured for receiving input from a viewer of the television is disclosed. The controller has a receiver operable to receive advertisements and a processor operable to modify the advertisements. The method generally comprises requesting action by the viewer of the television, modifying an advertisement based on the action of the viewer, and displaying the modified advertisement on the television.