IT1191332B - Silicon nitride based material - Google Patents
Silicon nitride based materialInfo
- Publication number
- IT1191332B IT1191332B IT84140/85A IT8414085A IT1191332B IT 1191332 B IT1191332 B IT 1191332B IT 84140/85 A IT84140/85 A IT 84140/85A IT 8414085 A IT8414085 A IT 8414085A IT 1191332 B IT1191332 B IT 1191332B
- Authority
- IT
- Italy
- Prior art keywords
- signal
- units
- sample
- relevant
- sign
- Prior art date
Links
- 229910052581 Si3N4 Inorganic materials 0.000 title 1
- 239000000463 material Substances 0.000 title 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 title 1
- 230000003044 adaptive effect Effects 0.000 abstract 1
- 238000004364 calculation method Methods 0.000 abstract 1
- 238000005314 correlation function Methods 0.000 abstract 1
- 238000000605 extraction Methods 0.000 abstract 1
- 230000005236 sound signal Effects 0.000 abstract 1
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
An audio signal processor treats a digitally encoded signal. Units (3, 12) sample the encoded signal and units (8, 13) calculate from the sampled values a correlation function relevant to a particular time frame. The function value serves to control an adaptive echo cancellation algorithm. The sampled signal portions are truncated (2, 5) so that only the arithmetic sign bit of each signal portion contributes to the function calculation. An incoming signal sample is initially treated in an extraction block arranged to determine the arithmetic sign relevant to that signal, the resulting sign bits being fed in sequence to a shift register arranged to store a predetermined number of sign bits. Outputs are provided from selected locations in the register in accordance with a control logic select circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT84140/85A IT1191332B (en) | 1985-09-19 | 1985-09-19 | Silicon nitride based material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT84140/85A IT1191332B (en) | 1985-09-19 | 1985-09-19 | Silicon nitride based material |
Publications (2)
Publication Number | Publication Date |
---|---|
IT8584140A0 IT8584140A0 (en) | 1985-09-19 |
IT1191332B true IT1191332B (en) | 1988-03-16 |
Family
ID=11324655
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT84140/85A IT1191332B (en) | 1985-09-19 | 1985-09-19 | Silicon nitride based material |
Country Status (1)
Country | Link |
---|---|
IT (1) | IT1191332B (en) |
-
1985
- 1985-09-19 IT IT84140/85A patent/IT1191332B/en active
Also Published As
Publication number | Publication date |
---|---|
IT8584140A0 (en) | 1985-09-19 |
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