IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0317802
(1999-05-24)
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발명자
/ 주소 |
- Uhlik, Christopher R.
- Trott, Mitchell D.
- Alder, Lawrence J.
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
49 인용 특허 :
143 |
초록
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An emergency call recognition system which is activated when an off-hook situation occurs, which recognizes when an emergency number is dialed with or without the presence of a dial tone, and which provides the caller a communication channel to complete such a call. The present invention is used to
An emergency call recognition system which is activated when an off-hook situation occurs, which recognizes when an emergency number is dialed with or without the presence of a dial tone, and which provides the caller a communication channel to complete such a call. The present invention is used to give priority to emergency telephone calls. Typically the present invention is used in wireless local loop systems, however the present invention can also be incorporated into a conventional telephone system. The present invention uses an emergency call recognition system to determine if a person is dialing an emergency telephone number. If the emergency call recognition system recognizes a dialed telephone number as an emergency telephone number, then the caller is provided with a communication channel to complete the telephone call. The caller is provided a communication channel even if all of the communication channels are in use. This is accomplished by disconnecting calls that are not of an emergency nature.
대표청구항
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An emergency call recognition system which is activated when an off-hook situation occurs, which recognizes when an emergency number is dialed with or without the presence of a dial tone, and which provides the caller a communication channel to complete such a call. The present invention is used to
An emergency call recognition system which is activated when an off-hook situation occurs, which recognizes when an emergency number is dialed with or without the presence of a dial tone, and which provides the caller a communication channel to complete such a call. The present invention is used to give priority to emergency telephone calls. Typically the present invention is used in wireless local loop systems, however the present invention can also be incorporated into a conventional telephone system. The present invention uses an emergency call recognition system to determine if a person is dialing an emergency telephone number. If the emergency call recognition system recognizes a dialed telephone number as an emergency telephone number, then the caller is provided with a communication channel to complete the telephone call. The caller is provided a communication channel even if all of the communication channels are in use. This is accomplished by disconnecting calls that are not of an emergency nature. orming an aperture in said metal at the location of said end wall aperture. ng Blocking Effects," IEEE Trans. on Consumer Electron., 39(3):510-513, Aug. 1993. Jarske et al., "Post Filtering Methods for Reducing Blocking Effects from Coded Images," IEEE Trans. on Consumer Electro., 40(3):521-526, Aug. 1994. Ramamurthi, Bhaskar and Allen Gersho, "Nonlinear Space-Variant Postprocessing of Block Coded Images," IEEE Trans. Acous., Speech, and Signal Proc., ASSP-34(5):1258-1268, Oct. 1986. Reeve III, Howard C. and Jae S. Lim, "Reduction of Blocking Effects in Image Coding," Opt. Eng., 23(1):034-037, Jan.-Feb. 1984. Reid et al., "Second-Generation Image Coding: An Overview," in ACM Computing Surveys, 29(1):3-29, Mar. 1997. Xiaobing Lee et al., "Information Loss Recovery for Block-Based Image Coding Techniques--A Fuzzy Logic Approach," IEEE Transactions on Image Processing 4(3):259-273, Mar., 1995. ein each grouping includes a separate plurality of data records that are accessed together as a group when using the geographic database; with respect to each of said groupings, identifying matching substrings of data within said grouping; and when a substring of data is encountered at a position in a grouping that matches a previous substring in said grouping, replacing the substring with a substitution code thereby forming the geographic database that includes a plurality of groupings each of which includes substitution codes that occupy the prior substrings referenced thereby. 2. The method of claim 1 wherein each substitution code comprises a backwards offset from the position of said substitution code to said previous matching substring. 3. The method of claim 1 further comprising: prior to separating at least the first plurality of data records into a plurality of groupings, forming separate types of data records, wherein each type includes a separate plurality of data records; then, with respect to each type, separating the plurality of data records within the type into a plurality of groupings, each of which includes a separate plurality of data records of the given type which are accessed together as a group; and then further within each of said groupings, identifying matching substrings of data and replacing the substring with a substitution code. 4. The method of claim 1 further comprising the step of: determining character occurrence frequencies within at least part of said geographic database; forming an index that associates characters with coded representations thereof based upon said occurrence frequencies; and replacing those characters within said at least part of said geographic database with said coded representations. 5. The method of claim 4 further comprising the step of: storing said index in said geographic database. 6. The method of claim 4 further comprising the step of: storing said index in a global portion of said geographic database. ding end of said fed transfer medium reaches said countercharge applying unit, and said charger ends charge application to said surface of said convey belt such that that portion on said surface of said convey belt to which the charges are applied passes through said countercharge applying unit at substantially the same timing as a timing at which a trailing end of said transfer medium passes through said countercharge applying unit. 2. An apparatus according to claim 1, wherein said apparatus has a color mode in which a color image is formed by using four color toners including yellow, magenta, cyan, and black, and a monochromatic mode in which a monochromatic image is formed by using black toner, in the monochromatic mode, said convey belt and, of said plurality of image carriers, an image carrier on which a toner image is to be formed with a color toner are separated from each other, and said transfer medium is chucked onto said convey belt by said chucking unit only in the monochromatic mode. 3. An apparatus for forming an image, comprising: a plurality of image carriers on which a toner image is to be formed; a first charging unit for applying charges to surfaces of said image carriers; a developing unit for forming a toner image on said image carriers; a convey belt disposed in contact with said image carriers and adapted to convey a transfer medium; a chucking unit which has a second charging unit for applying charges to a surface of said convey belt and a countercharge applying unit for applying countercharges in order to electrostatically chuck said transfer medium with said convey belt, and electrostatically chucks said transfer medium onto said convey belt; and a transfer unit for transferring the toner image from said image carriers to said transfer medium in a transfer region where said image carriers are in contact with said convey belt, wherein the charges applied to said surfaces of said image carriers by said first charging unit and the charges applied to said surface of said convey belt by said second charging unit have the same polarity. 4. An apparatus for forming an image, comprising: a plurality of image carriers on which a toner image is to be formed; a developing unit for forming a toner image on said image carriers; a convey belt disposed in contact with said image carriers and adapted to convey a transfer medium; a chucking unit which has a charging unit for applying charges to a surface of said convey belt and a countercharge applying unit for applying countercharges in order to electrostatically chuck a transfer medium with said convey belt, and electrostatically chucks said transfer medium onto said convey belt; and a transfer unit to which a bias is applied in a transfer region where said image carriers are in contact with said convey belt, to transfer the toner image from said image carriers to said transfer medium, wherein said apparatus has a color mode in which a color image is formed by using four color toners including yellow, magenta, cyan, and black, and a monochromatic mode in which a monochromatic image is formed by using black toner, in the monochromatic mode, said convey belt and, of said plurality of image carriers, an image carrier on which a toner image is to be formed with a color toner are separated from each other, and a DC bias is applied to said charging unit while the fed sheet passes near said countercharge applying unit from a leading end to a trailing end thereof, in order to apply charges to said surface of said convey belt, and an AC bias is applied to said charging unit in a remaining period. 5. A transfer medium chucking method of applying charges to a surface of a convey belt by using a charger, and applying countercharges to said convey belt by using a countercharge applying unit, thereby electrostatically chucking a transfer medium onto said convey belt, said method comprising: starting charge application to said surface of s aid convey belt with said charger such that that portion on said surface of said convey belt to which the charges are applied by said charges reaches said countercharge applying unit at substantially the same timing as a timing at which a leading end of said fed transfer medium reaches said countercharge applying unit, and ending charge application to said surface of said convey belt with said charger such that that portion on said surface of said convey belt to which the charges are applied passes through said countercharge applying unit at substantially the same timing as a timing at which a trailing end of said transfer medium passes through said countercharge applying unit. 6. A method according to claim 5, wherein said method has a color mode in which a color image is formed by using four color toners including yellow, magenta, cyan, and black, and a monochromatic mode in which a monochromatic image is formed by using black toner, and said transfer medium is chucked onto said convey belt by said charger and said countercharge applying unit only in the monochromatic mode. 7. A transfer medium chucking method of applying charges to a surface of an image carrier, where a toner image is to be formed, by using a first charging unit, applying charges to a surface of a convey belt which conveys a transfer medium, by using a second charging unit, and applying countercharges to said convey belt by using a countercharge applying unit, thereby electrostatically chucking said transfer medium onto said convey belt, wherein the charge applied to said surfaces of said image carrier by said first charging unit and the charges applied to said surface of said convey belt by said second charging unit have the same polarity. 8. A transfer medium chucking method of applying charges to a surface of the convey belt by using a charger, and applying countercharges to said convey belt by using a countercharge applying unit, thereby electrostatically chucking a transfer medium onto said convey belt, wherein said method has a color mode in which a color image is formed by using four color toners including yellow, magenta, cyan, and black, and a monochromatic mode in which a monochromatic image is formed by using black toner, and in the monochromatic mode, a DC bias is applied to said charging unit while the fed sheet passes near said countercharge applying unit from a leading end to a trailing end thereof, in order to apply charges to said surface of said convey belt, and an AC bias applied to said charging unit in a remaining period.
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