What is claimed is:
1. A mobile terminal, comprising:
a terminal main body;
a folder having a main LCD mounted thereon; and
a hinge device configured to hinge the folder to the terminal main body and having a sub-LCD mounted at a predetermined position thereon.
2. The mobile terminal of claim 1, wherein the sub-LCD is configured so that it is exposed when the folder is opened and when the folder is closed.
3. The mobile terminal of claim 1, wherein the hinge device comprises:
a hinge mounted on the folder;
a hinge combining unit comprising the sub-LCD; and
a rotational shaft for coupling the hinge and the hinge combining unit.
4. The mobile terminal of claim 1, wherein the sub-LCD is mounted on a hinge combining unit of the main body.
5. The mobile terminal of claim 4, wherein the hinge combining unit is positioned at an upper central portion of the main body.
6. The mobile terminal of claim 3, wherein the hinge is positioned on both sides of the folder.
7. A mobile terminal, comprising:
a terminal main body;
a folder with a main LCD mounted thereon; and
a hinge device, wherein the hinge device comprises:
a hinge mounted on the folder;
a hinge combining unit having a sub-LCD; and
a rotational shaft for coupling the hinge and the hinge combining unit.
8. The mobile terminal of claim 7, wherein the sub-LCD is configured so that it is exposed when the folder is opened and when the folder is closed.
9. The mobile terminal of claim 7, wherein the hinge combining unit is positioned at a center of the hinge device.
10. The mobile terminal of claim 7, wherein the hinge is positioned on both sides of the hinge device.
11. The mobile terminal of claim 7, wherein the hinge is positioned at a center of the hinge device.
12. A mobile terminal, comprising:
a main body;
a cover attached to the main body;
a first display mounted on the cover; and
a second display configured to be viewable whether the cover is opened or closed.
13. The mobile terminal of claim 12, wherein the cover is attached to the main body by a hinge device.
14. The mobile terminal of claim 13, wherein the second display is part of the hinge device.
15. The mobile terminal of claim 14, wherein a portion of the hinge device on which the second display is mounted forms part of the main body.
16. The mobile terminal of claim 14, wherein the second display is an LCD.
17. The mobile terminal of claim 13, wherein the hinge device comprises:
a hinge attached to the cover;
a hinge combining unit attached to the main body; and
a rotational shaft configured to couple the hinge combining unit to the hinge.
18. The mobile terminal of claim 17, wherein the second display is attached to the hinge combining unit.
19. The mobile terminal of claim 18, wherein the second display is an LCD.
20. The mobile terminal of claim 18, wherein a portion of the hinge combining unit to which the second display is attached forms part of the main body.
21. The mobile terminal of claim 12, wherein the cover is a flap-style cover.
22. The mobile terminal of claim 21, wherein the first display is mounted on an inside of the cover.
23. The mobile terminal of claim 12, wherein the second display is mounted on the main body.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method for determining a digital filter structure, the method comprising:
obtaining a transfer function of a digital filter in the form of one or more filter components including an annihilating component, a minimum phase component, a non-minimum phase component, and a symmetric component; and
for each of the one or more filter components, representing each of the filter components as a set of interconnected notch filters, wherein each set of notch filters includes at least one of a first notch filter having a half-lattice structure, and a second notch filter having a full lattice structure.
2. The method of claim 1, further comprising decomposing:
the annihilating component as a series combination of one or more first notch filters and one or more second notch filters; and
the minimum phase component, non-minimum phase component, and the symmetric component as a series and a parallel combination of one or more first notch filters and one or more second notch filters.
3. The method of claim 1, wherein each of the notch filters are represented as single port devices.
4. The method of claim 1, further comprising using a canonic filter module to implement at least one of the annihilating component, the minimum phase component, the non-minimum phase component, andor the symmetric component.
5. The method of claim 1, further comprising determining lattice coefficients of the first notch filter and the second notch filter for each set of notch filters.
6. The method of claim 1, further comprising generating a data structure defining the digital filter structure.
7. An article of manufacture including a computer readable medium having instructions stored thereon that, in response to execution by a computing device, cause the computing device to perform operations comprising:
obtaining a transfer function for a digital filter in the form of one or more filter components including an annihilating component, a minimum phase component, a non-minimum phase component, and a symmetric component; and
for each of the one or more filter components, representing each of the filter component as a set of interconnected notch filters, wherein each set of notch filters includes at least one of a first notch filter having a half-lattice structure, andor a second notch filter having a full lattice structure.
8. The article of manufacture of claim 7, wherein the operations further comprise decomposing:
the annihilating component as a series combination of one or more first notch filters and one or more second notch filters; and
the minimum phase component, non-minimum phase component, and the symmetric component as a series-parallel combination of one or more first notch filters and one or more second notch filters.
9. The article of manufacture of claim 7, wherein the operations further comprise:
decomposing each of the minimum phase component, the non-minimum phase component, and the symmetric component into annihilating subcomponents wherein each of the annihilating subcomponents include one or more first notch filters and one or more second notch filters.
10. The article of manufacture of claim 7, wherein the operations further comprise deriving parameters to program a canonic filter module to implement at least one of the annihilating component, the minimum phase component, the non-minimum phase component, andor the symmetric component.
11. The article of manufacture of claim 7, wherein the operations further comprise determining lattice coefficients of the first notch filter and the second notch filter for each set of notch filters.
12. The article of manufacture of claim 7, wherein the operations further comprise generating a data structure defining a digital filter structure.
13. A device for filtering digital signals, the device comprising:
a processor having one or more function modules including at least one of an annihilating function module, a minimum phase function module, a non-minimum phase function module, andor a symmetric function module;
each of the function modules further comprising a set of interconnected notch filters, wherein each set of notch filters includes at least one of a first notch filter having a half-lattice structure, andor a second notch filter having a full lattice structure;
a memory coupled to the processor and configured to store sets of half-lattice and full-lattice coefficients respectively corresponding to each set of interconnected notch filters.
14. The device of claim 13, wherein the annihilating function module includes a series combination of one or more first notch filters and one or more second notch filters.
15. The device of claim 13, wherein the symmetric function module includes a series-parallel combination of one or more first notch filters and one or more second notch filters.
16. The device of claim 13, further comprising a canonic filter function module configured as a function module selected from the group consisting of an annihilating function module, a minimum phase function module, a non-minimum phase function module, and a symmetric function module.
17. The device of claim 13, wherein the first notch filter includes a first delay circuit, a first multiplier circuit, and a first adder circuit.
18. The device of claim 13, wherein the second notch filter includes a second delay circuit and a third delay circuit, a second multiplier circuit and a third multiplier circuit, and a second adder circuit, a third adder circuit, and a fourth adder circuit.
19. The device of claim 13, wherein the first notch filter is implemented with a rotate-and-accumulate operation.
20. The device of claim 13, wherein the second notch filter is implemented with a real multiply-and-accumulate operation.