Boots – shoes – and leggings
Patent
1977-11-17
1978-09-26
Brown, Thomas W.
Boots, shoes, and leggings
364200, G10L 108, G06F 722
Patent
active
041172639
ABSTRACT:
Announcements for each subscriber are assembled specifically for that subscriber from speech segments stored in a digital memory. Each speech segment comprises a predetermined number of consecutive digital words stored in the digital memory and identified by a unique base address. A sequence of speech segment base addresses is placed in a first shift register which is rotated at a fixed rate. An incrementer increments the base addresses read from the shift register by an amount equal to the number of times that the entire base address sequence has been rotated, up to the number of digital words per speech segment. The incremented base addresses are used to access the digital memory. During the rotation of the first shift register, a second shift register is loaded with a second sequence of base addresses. The use of the first and second shift registers is alternated after an entire sequence of base addresses has been read the predetermined number of times so that the output of the digital memory consists of a continuous series of digital words in recurring frames of time-slots where the number of time-slots per frame is equal to the number of base addresses in a shift register. The system also includes a plurality of digital-to-analog speech generators which are uniquely associated with the output time-slots of the speech segment memory.
REFERENCES:
patent: 3546676 (1970-12-01), Ragen
patent: 3662348 (1972-05-01), Weiss
patent: 4031324 (1977-06-01), Dudonis
patent: 4054756 (1977-10-01), Comella et al.
patent: 4060848 (1977-11-01), Hyatt
patent: 4071888 (1978-01-01), Owens
Bell Telephone Laboratories Incorporated
Brown Thomas W.
Kemeny E. S.
Samples Kenneth H.
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