IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0877807
(2001-06-06)
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발명자
/ 주소 |
- Petrus, Paul
- Chiodini, Alain M.
- Trott, Mitchell D
- Parish, David M.
- Youssefmir, Michael
- Rosenfeld, Dov
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출원인 / 주소 |
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대리인 / 주소 |
Blakely, Sokoloff, Taylor & Zafman LLP
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인용정보 |
피인용 횟수 :
48 인용 특허 :
152 |
초록
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A method for generating a reference signal from a modulated signal transmitted to a communications station that includes an array of antenna elements and spatial processing means including: separating from the signals received at the antenna elements a copy signal corresponding to the signal transmi
A method for generating a reference signal from a modulated signal transmitted to a communications station that includes an array of antenna elements and spatial processing means including: separating from the signals received at the antenna elements a copy signal corresponding to the signal transmitted by a particular remote station using an initial spatial weight vector corresponding to the particular remote station; determining from the terminal copy signal a reference signal having substantially the same frequency offset and time alignment as the received antenna signals; and computing a new spatial weight vector by optimizing a cost function, the cost function using the received antenna signals and the reference signal. For demodulation, the method further includes extracting the symbols of the modulated signal.
대표청구항
▼
A method for generating a reference signal from a modulated signal transmitted to a communications station that includes an array of antenna elements and spatial processing means including: separating from the signals received at the antenna elements a copy signal corresponding to the signal transmi
A method for generating a reference signal from a modulated signal transmitted to a communications station that includes an array of antenna elements and spatial processing means including: separating from the signals received at the antenna elements a copy signal corresponding to the signal transmitted by a particular remote station using an initial spatial weight vector corresponding to the particular remote station; determining from the terminal copy signal a reference signal having substantially the same frequency offset and time alignment as the received antenna signals; and computing a new spatial weight vector by optimizing a cost function, the cost function using the received antenna signals and the reference signal. For demodulation, the method further includes extracting the symbols of the modulated signal. control signals. 4. The digital line driver circuit of claim 3, wherein said gate section is arranged to also receive said mode selection signal. 5. The digital line driver circuit according to claim 4, wherein said reference signal generating section comprises: a reference voltage providing section arranged to output a plurality of reference voltages; and an impedance conversion section comprising a plurality of impedance conversion circuits arranged to receive said plurality of reference voltages and to generate said m signals in response thereto. 6. The digital line driver circuit according to claim 5, further comprising a current balancing section arranged to receive said one or more control signals and to generate currents in accordance therewith in order to balance a supply current of said digital line driver circuit. 7. The digital line driver circuit of claim 6, wherein said current balancing section comprises switching devices controlled in dependence on said one or more control signals and arranged to selectively provide connections between predetermined outputs of said impedance conversion circuits, said connections having predetermined impedance values. 8. The digital line driver circuit of claim 7, wherein said switching devices comprise MOS transistors that also provide said impedance values. 9. The digital line driver circuit according to claim 5, wherein each of said impedance conversion circuits comprises an operational amplifier circuit having a push pull output stage. 10. The digital line driver circuit according to claim 1, wherein said reference signal generating section comprises: a reference voltage providing section arranged to output a plurality of reference voltages; and an impedance conversion section comprising a plurality of impedance conversion circuits arranged to receive said plurality of reference voltages and to generate said m signals in response thereto. 11. The digital line driver circuit according to claim 10, wherein each of said impedance conversion circuits comprises an operational amplifier circuit having a push pull output stage. 12. The digital line driver circuit according to claim 1, further comprising a current balancing section arranged to receive said one or more control signals and to generate currents in accordance therewith in order to balance a supply current of said digital line driver circuit. 13. The digital line driver circuit of claim 12, wherein said current balancing section comprises switching devices controlled in dependence on said one or more control signals and arranged to selectively provide connections between predetermined outputs of said impedance conversion circuits, said connections having predetermined impedance values. 14. The digital line driver circuit of claim 13, wherein said switching devices comprise MOS transistors that also provide said impedance values. 15. A method for operating a digital line driver circuit that is arranged to receive a digital input signal and to output a digital output signal in accordance with said digital input signal, comprising operating said digital line driver circuit in at least a first and a second mode in accordance with a mode selection signal, wherein said first mode is a signal relay mode in which said digital output signal follows said digital input signal, and said second mode is a pre-distortion mode in which said digital output signal follows said digital input signal and has an additional predetermined distortion, said method comprising the steps of: receiving said digital input signal and said mode selection signal and outputting one more control signals that depend on said digital input signal and on said mode selection signal; processing said one or more control signals to output said output signal in dependence on said one or more control signals; wherein said processing step comprises: generating m distinctive reference signal levels, m being an integer larger than two; and selectin g among said reference signal levels for coupling with said signal output in accordance with said one or more control signals, in order to generate and output said output signal. agonal processing of video data as recited in claim 17 further comprising a digital processing system coupled to said bus interface. 19. An apparatus for diagonal processing of video data as recited in claim 18 wherein said digital processing system is a personal computer system. 20. A method for processing of video data comprising: recognizing diagonally arranged data in a video stream; processing said diagonally arranged data into rectilinear data; and compressing said rectilinear data by a rectilinear compression algorithm. 21. A method for automatically creating address generators comprising: generating original coordinate pairs specifying the original position of each element in a sensor mosaic; transforming said original coordinate pairs into a sequence of adjusted coordinate pairs which are rectilinearly juxtaposed; and generating a finite state automaton that mimics the sequence of adjusted coordinate pairs. 22. A method for automatically creating address generators as recited in claim 21 further comprising: executing said finite state automaton to generate addresses that are used to route data into the appropriate locations in a plurality of block buffers. 1; US-5640605, 19970600, Johnson et al., 395/881; US-5896417, 19990400, Lau, 375/258; US-5940387, 19990800, Humpleman, 370/352; US-6201796, 20010300, Agazzi et al., 370/286; US-6229788, 20010500, Graves et al., 370/230; US-6259745, 20010700, Chan, 375/285; US-6332004, 20011200, Chan, 375/257 get high-resolution block. 6. A data recording medium for storing a program which makes a computer perform a hierarchical image coding process, the program operable to make the computer perform a hierarchical image coding process according to an image processing method of claim 1. 7. The image processing method of claim 1, wherein the spatial position of the reference low-resolution block in the low-resolution image space relatively matches the spatial position of the target high-resolution block in the high-resolution image space. 8. The image processing method of claim 1, wherein a mode signal indicating a coding mode for identifying a coding process for the target high-resolution block is coded according to a coding mode for identifying a coding process for the reference low-resolution block, and the coding mode indicates that the coding process sequentially performed to the image signal of the reference low-resolution block for each pixel is performed in either a horizontal or vertical scanning direction. 9. The image processing method of claim 1, wherein motion information of the target high-resolution block indicating motion of an object in the high-resolution image space is coded by referring to motion information of the reference low-resolution block indicating motion of an object in the low-resolution image space. 10. The image processing method of claim 1, wherein motion information of the target high-resolution block indicating motion of an object in the high-resolution image space is coded by referring to motion information of a coded high-resolution block indicating motion of an object in the high-resolution image space and motion information of the reference low-resolution block indicating motion of an object in the low-resolution image space. 11. An image processing method for decoding at least two blocked and hierarchically coded signals corresponding to an object which are obtained by hierarchically coding an input image signal including shape information of the object, object by object which is included in an image, said method comprising: decoding a low-resolution coded signal corresponding to the object of the blocked and hierarchically coded signals to produce low-resolution decoded signals of low-resolution blocks each comprising a predetermined number of pixels in a low-resolution image space; integrating the low-resolution decoded signals to produce a low-resolution region image signal corresponding to a region including the object in the low-resolution image space; decoding a high-resolution coded signal corresponding to the object of the blocked and hierarchically coded signals by referring to a reference low-resolution decoded signal to produce high-resolution decoded signals of high-resolution blocks each comprising a predetermined number of pixels in a high-resolution image space; and integrating the high-resolution decoded signals to produce a high-resolution region image signal corresponding to a region including the object in the high-resolution image space, wherein a spatial position of the reference low-resolution block in the low-resolution image space relatively corresponds to a spatial position of a target high-resolution block to be decoded in the high-resolution image space according to a predetermined rule. 12. The image processing method of claim 11, wherein each pixel in the high-resolution image space has a one-to-one correspondence with each pixel in a resolution-converted image space in which the low-resolution image space has been resolution-converted, the resolution-converted image space having the same spatial resolution as the high-resolution image space. 13. The image processing method of claim 11, wherein the number of pixels in the reference low-resolution block is equal to the number of pixels in the target high-resolution block. 14. The image processing method of claim 11, wherein a decoding method for a coded mode signal indicating a coding mode for identifying a d ecoding process for the target high-resolution block is changed according to a coding mode for identifying a decoding process for the reference low-resolution block. 15. A data recording medium for storing a program which makes a computer perform a hierarchical image decoding process, the program operable to make the computer perform a hierarchical image decoding process according to an image processing method of claim 11. 16. The image processing method of claim 11, wherein the spatial position of the reference low-resolution block in the low-resolution image space relatively matches the spatial position of the target high-resolution block in the high-resolution image space. 17. The image processing method of claim 11, wherein a coded mode signal indicating a coding mode for identifying a decoding process for the target high-resolution block is decoded according to a coding mode for identifying a decoding process for the reference low-resolution block, and the coding mode indicates whether or not a boundary of a shape of an object displayed on an image space is included in the target high-resolution block. 18. The image processing method of claim 11, wherein a coded mode signal indicating a coding mode for identifying a decoding process for the target high-resolution block is decoded according to a coding mode for identifying a decoding process for the reference low-resolution block, and the coding mode indicates that the decoding process sequentially performed to the low-resolution coded signal of the reference low-resolution block for each pixel is performed in either a horizontal or vertical scanning direction. 19. The image processing method of claim 16, wherein motion information of the target high-resolution block indicating motion of an object in the high-resolution image space is decoded according to motion information of the reference low-resolution block indicating motion of an object in the low-resolution image space. 20. The image processing method of claim 11, wherein motion information of the target high-resolution block indicating motion of an object in the high-resolution image space is decoded according to motion information of a decoded high-resolution block indicating motion of an object in the high-resolution image space and motion information of the reference low-resolution block indicating motion of an object in the low-resolution image space. 21. An image processing apparatus for hierarchically coding an input image signal including shape information of an object, object by object which is included in an image, said apparatus comprising: a subsampling means for subsampling the input image signal to produce a low-resolution image signal; a first region extraction means for producing a low-resolution region image signal, corresponding to a region including the object which is to be coded in the low-resolution image space, from the low-resolution image signal; a first blocking means for performing a blocking process in such a way that the low-resolution region image signal is divided into signals respectively corresponding to low-resolution blocks each comprising a predetermined number of pixels and outputting low-resolution blocked image signals; a first encoding means for sequentially coding a low-resolution blocked image signal forming a low-resolution block to be coded; a second region extraction means for producing a high-resolution region image signal, corresponding to a region including the object which is to be coded in the high-resolution image space, from the high-resolution image signal as the input image signal; a second blocking means for performing a blocking process in such a way that the high-resolution region image signal is divided into signals respectively corresponding to high-resolution blocks each comprising a predetermined number of pixels and outputting high-resolution blocked image signals; and a second encoding means for sequentially coding a high-resolution blocked image signal forming a target high-resolution block to be coded by referring to a low-resolution blocked image signal forming a reference low-resolution block corresponding to the target high-resolution block; wherein a spatial position of the reference low-resolution block in the low-resolution image space relatively corresponds to a spatial position of the target high-resolution block in the high-resolution image space according to a predetermined rule. 22. An image processing apparatus for decoding at least two blocked and hierarchically coded signals corresponding to an object which are obtained by hierarchically coding an input image signal including shape information of the object, object by object which is included in an image, said apparatus comprising: a first decoding means for decoding a low-resolution coded signal corresponding to the object of the blocked and hierarchically coded signals to produce low-resolution decoded signals of low-resolution blocks each comprising a predetermined number of pixels in a low-resolution image space; a first inverse blocking means for integrating the low-resolution decoded signals of the low-resolution blocks to produce a low-resolution region image signal corresponding to a region including the object in the low-resolution image space; a second decoding means for decoding a high-resolution coded signal corresponding to the object of the blocked and hierarchically coded signals, by referring to a reference low-resolution decoded signal, to produce high-resolution decoded signals of high-resolution blocks each comprising a predetermined number of pixels in a high-resolution image space; and a second inverse blocking means for integrating the high-resolution decoded signals of the high-resolution blocks to produce a high-resolution region image signal corresponding to a region including the object in the high-resolution image space; wherein a spatial position of the reference low-resolution block in the low-resolution image space relatively corresponds to a spatial position of the target high-resolution block in the high-resolution image space according to a predetermined rule. 23. An image processing apparatus for hierarchically coding an input image signal including shape information of an object, object by object which is included in an image, said apparatus comprising: a subsampling device operable to subsample the input image signal to produce a low-resolution image signal; a first region extraction device operable to produce a low-resolution region image signal, corresponding to a region including the object which is to be coded in the low-resolution image space, from the low-resolution image signal; a first blocking device operable to perform a blocking process in such a way that the low-resolution region image signal is divided into signals respectively corresponding to low-resolution blocks each comprising a predetermined number of pixels and output low-resolution blocked image signals; a first encoding device operable to sequentially code a low-resolution blocked image signal forming a low-resolution block to be coded; a second region extraction device operable to produce a high-resolution region image signal, corresponding to a region including the object which is to be coded in the high-resolution image space, from the high-resolution image signal as the input image signal; a second blocking device operable to perform a blocking process in such a way that the high-resolution region image signal is divided into signals respectively corresponding to high-resolution blocks each comprising a predetermined number of pixels and output high-resolution blocked image signals; and a second encoding device operable to sequentially code a high-resolution blocked image signal forming a target high-resolution block to be coded by referring to a low-resolution blocked image signal forming a reference low-resolution block corresponding to the target high-resolution block ; wherein a spatial position of the reference low-resolution block in the low-resolution image space relatively corresponds to a spatial position of the target high-resolution block in the high-resolution image space according to a predetermined rule. 24. An image processing apparatus for decoding at least two blocked and hierarchically coded signals corresponding to an object which are obtained by hierarchically coding an input image signal including shape information of the object, object by object which is included in an image, said apparatus comprising: a first decoding device operable to decode a low-resolution coded signal corresponding to the object of the blocked and hierarchically coded signals to produce low-resolution decoded signals of low-resolution blocks each comprising a predetermined number of pixels in a low-resolution image space; a first inverse blocking device operable to integrate the low-resolution decoded signals of the low-resolution blocks to produce a low-resolution region image signal corresponding to a region including the object in the low-resolution image space; a second decoding device operable to decode a high-resolution coded signal corresponding to the object of the blocked and hierarchically coded signals, by referring to a reference low-resolution decoded signal, to produce high-resolution decoded signals of high-resolution blocks each comprising a predetermined number of pixels in a high-resolution image space; and a second inverse blocking device operable to integrate the high-resolution decoded signals of the high-resolution blocks to produce a high-resolution region image signal corresponding to a region including the object in the high-resolution image space; wherein a spatial position of the reference low-resolution block in the low-resolution image space relatively corresponds to a spatial position of the target high-resolution block in the high-resolution image space according to a predetermined rule.
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