Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
2000-10-26
2004-07-13
Trost, William (Department: 2683)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S550100, C455S073000, C455S084000, C455S517000, C381S107000, C381S104000, C381S106000
Reexamination Certificate
active
06763253
ABSTRACT:
The invention concerns a device for bidirectional transferring of audio and/or video signals, in particular in the context of sound and/or image reports.
Devices of the above-mentioned type are known. One known device displays means for providing an audio input signal. The means is connected to a transmission and/or reception device for transmitting the audio signal and/or receiving a audio reception signal. In the known device the transmission and/or reception equipment is designed as ISDN equipment. The application possibilities of the known device are limited to the extent that the operator is dependent on the presence of an ISDN line in the fixed network. If need be, the report to be transferred must be intermediately stored on a storage medium. The storage medium, with the report stored on it, is brought to a device that is connected to an ISDN line. The report is transferred from the storage medium to the device and transmitted via the ISDN line.
In another known device, the transmission and/or reception equipment is designed as a device for connection to a GSM telephone. The connection to the GSM telephone is complicated. In order to transmit with high sound quality, the report must first be intermediately stored on a storage medium. This is due to the fact that when transferring the report via a GSM telephone the transfer rate is low and thus the transferring of the report can be of longer duration than the report itself.
The object forming the basis of the invention is to further develop the known device for bidirectional transferring of audio and/or video signals in such a way that the application possibilities are greatly expanded relative to the prior art.
This object is achieved through a device for bidirectional transferring of audio and/or video signals, in particular in the context of sound and/or image reports, preferably for a real-time transfer, with the following features:
at least one means for providing an audio input signal
a first mixing device that is connected to the means for providing an audio input signal and is intended for output of a mixed audio transmission signal
a transmission and/or reception device coupled to the first mixing device for transmitting the mixed audio transmission signal and/or receiving an audio reception signal
a control device coupled to the first mixing device for controlling the first mixing device
a second mixing device (
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a compression and/or decompression device for compressing the mixed audio transmission signal or decompression of the audio reception signal, which device is coupled to the first mixing device for taking up the mixed audio transmission signal or, as the case may be, to at least one second mixing device for delivery of a decompressed audio reception signal, and to the transmission and/or reception device for delivery of a compressed audio transmission signal or, as the case may be, for taking up the audio reception signal
at least one means connected to the second mixing device for reproducing an audio output signal, which in particular presents the decompressed audio reception signal
in this device, as a transfer channel provision is made for at least one mobile radio and/or mobile telephone network channel
With the invention, one obtains a device for bidirectional transferring of audio and/or video signals, which device's application possibilities, in particular in the context of sound and/or image reports, are quite manifold. The device according to the invention is especially simple to operate. Through the mobile radio or mobile telephone channel, the transfer can take place independently of a fixed network. Thus, the device makes possible an application that is to a great degree untied to location. By means of the device, the report can be transferred in real time at a high level of quality. Beyond this, the device makes possible, during the reproduction of the report, an interactive inclusion of the receiver of the report.
The transmission and/or reception device is intended for—preferably independent—transmitting and/or receiving of the compressed audio transmission signal or audio reception signal on several transfer channels, which preferably have the same importance. If necessary, by means of the device video signals and/or other signals relevant to a report can also be transferred, transmitted, and/or received. An advantage of this form of embodiment of the invention is the fact that a rate of transfer that amounts to many times that of a single transfer channel becomes possible. In the case of a form of embodiment that is to be preferred, according to which the transfer can take place on the transfer channels independently of each other, an especially high degree of stability of the transfer is ensured, even if, during the transfer, a (temporary) loss of one or more of the transfer channels should occur. Depending on the compressed audio transmission signal to be transmitted and the audio reception signal to be received, the number and/or type of the transfer channels intended for the transfer differ from the number and/or type of the transfer channels intended for the reception. In this form of embodiment, by means of an adapting of the number and/or type of the transfer channels to the present requirements, the transfer channels are optimally used to capacity, in particular in order to make possible a transfer in real time while using the lowest possible number of transfer channels.
Preferably, the device displays a first channel-control device for selecting one or several transfer channels. If need be, the first channel-control device puts the data of the compressed audio transmission signal into packets. The first channel-control device then distributes the data packets over the transfer channels. The first channel-control device is placed between the compression device and the transmission device. In this form of embodiment of the invention, the first channel-control device ensures an especially simple transfer, even when the data of the audio signal is transmitted in packeted and/or compressed form. Preferably, a second channel-control device is placed between the receiving device and the decompression device and is intended to reconstruct the audio reception signal when the possibly data-packed audio reception signal is received on more than one transfer channel.
The transmission and/or reception device is designed for connection to an antenna, by means of which the compressed audio transmission signal and/or the audio reception signal are transmitted or received, respectively, on the transfer channel or channels. Preferably, the device itself is equipped with the antenna, in order to ensure an especially high degree of independence of the transmission and/or reception operation.
Preferably, the device displays an A/D converter, which at a minimum is placed between the first means for obtaining the audio input signal and the first mixing device. The device according to the invention further displays a D/A converter, which is placed between the second mixing device and the means for reproducing the audio output signal. The A/D converter is intended for providing a digital audio input signal, and the D/A converter for providing an analog audio output signal. The device displays an output port for a digital outputting of the audio signals. Especially preferred is a form of embodiment according to which the output port has a sampling-rate converter for converting the bit rate of the audio signals. A still further improved form of embodiment displays means for dynamically adapting the bit rate of the audio signals, that is to say the data rate. With the dynamic adapting, an especially high degree of flexibility is achieved with respect to the connection of a digital reproduction apparatus to the output port.
In another form of embodiment of the invention, the device displays signal-level limiting device for controlling the level of the audio input signal, which limiting device is placed between the means for obtaining the audio input signal and the first mixing device. The signal
Haupt Axel
Niehoff Wolfgang
Altera Law Group LLC
Ferguson Keith
Sennheiser Electronics GmbH & Co. KG
Trost William
LandOfFree
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