1. A method of segmented frame synchronization for Integrated Services Digital Broadcasting-Terrestrial (ISDB-T) and Integrated Services Digital Broadcasting-Terrestrial Sound Broadcasting (ISDB-TSB) systems, said method comprising:
receiving a wireless digital signal comprising an Orthogonal Frequency Division Multiplexing (OFDM) frame in a receiver, wherein said OFDM frame comprises OFDM symbols, and wherein said receiver comprises a time de-interleaver, a bit de-interleaver, and a descrambler;
filling memory of said time de-interleaver and bit de-interleaver by said received wireless digital signal;
determining an OFDM segmented frame boundary when the said memory of said time de-interleaver and bit de-interleaver are full;
decoding bits from said time de-interleaver and said bit de-interleaver using a Viterbi decoder;
outputting the Viterbi decoding bits from said time de-interleaver and said bit de-interleaver when said OFDM segmented frame boundary is detected;
obtaining a segmented multiplexing frame boundary upon receipt of a first bit from said Viterbi decoder; and
synchronizing the OFDM frame based on the segmented multiplexing frame boundary.
2. The method of claim 1, wherein said segmented multiplexing frame boundary comprises a quarter segment.
3. The method of claim 1, wherein said segmented multiplexing frame boundary comprises a half segment, an eighth segment, or a sixteenth segment.
4. The method of claim 1, further comprising detecting whether a symbol number corresponding to a received OFDM symbol is any of symbol 0, symbol 204x, symbol 2*(204x), and symbol 3*(204x), where x is a reciprocal of a segment boundary.
5. The method of claim 4, wherein if it is detected that said symbol number is any of symbol 0, symbol 204x, symbol 2*(204x), and symbol 3*(204x), where x is a reciprocal of a segment boundary, said method further comprising determining that said OFDM segmented frame boundary is achieved.
6. The method of claim 2, wherein said descrambler starts descrambling only at quarter frame multiplexing.
7. The method of claim 1, wherein said segmented multiplexing frame boundary indicates a start of a transport packet.
8. The method of claim 1, further comprising performing additional decoding on the Viterbi decoded bits upon completion of the outputting process.
9. An apparatus for segmented frame synchronization for Integrated Services Digital Broadcasting-Terrestrial (ISDB-T) and Integrated Services Digital Broadcasting-Terrestrial Sound Broadcasting (ISDB-TSB) systems, said apparatus comprising:
a receiver that receives a wireless digital signal comprising an Orthogonal Frequency Division Multiplexing (OFDM) frame, wherein said OFDM frame comprises OFDM symbols;
a time de-interleaver comprising memory that is filled by said received wireless digital signal;
a bit de-interleaver comprising memory that is filled by said received wireless digital signal;
a detector that determines a location of an OFDM segmented frame boundary when the said memory of said time de-interleaver and bit de-interleaver are full;
a Viterbi decoder that decodes bits from said time de-interleaver and said bit de-interleaver, wherein Viterbi decoding bits are output from said time de-interleaver and said bit de-interleaver when said OFDM segmented frame boundary is detected, and wherein a segmented multiplexing frame boundary is obtained upon receipt of a first bit from said Viterbi decoder; and
a processor that synchronizes the OFDM frame based on the segmented multiplexing frame boundary.
10. The apparatus of claim 9, wherein said segmented multiplexing frame boundary comprises a quarter segment.
11. The apparatus of claim 9, wherein said segmented multiplexing frame boundary comprises a half segment, an eighth segment, or a sixteenth segment.
12. The apparatus of claim 9, wherein said detector detects whether a symbol number corresponding to a received OFDM symbol is any of symbol 0, symbol 204x, symbol 2*(204x), and symbol 3*(204x), where x is a reciprocal of a segment boundary.
13. The apparatus of claim 12, wherein if said detector detects that said symbol number is any of symbol 0, symbol 204x, symbol 2*(204x), and symbol 3*(204x), where x is a reciprocal of a segment boundary, said processor determines that said OFDM segmented frame boundary is achieved.
14. The apparatus of claim 10, further comprising a descrambler that starts descrambling only at quarter frame multiplexing.
15. The apparatus of claim 9, wherein said segmented multiplexing frame boundary indicates a start of a transport packet.
16. The apparatus of claim 9, further comprising means for performing decoding on the Viterbi decoded bits that are output from said time de-interleaver and said bit de-interleaver.
17. A system for quarter-frame synchronization for Integrated Services Digital Broadcasting-Terrestrial (ISDB-T) and Integrated Services Digital Broadcasting-Terrestrial Sound Broadcasting (ISDB-TSB) systems, said system comprising:
a receiver that receives a wireless digital signal comprising an Orthogonal Frequency Division Multiplexing (OFDM) frame, wherein said OFDM frame comprises OFDM symbols, and wherein said receiver comprises a time de-interleaver, a bit de-interleaver, and a descrambler;
means for filling memory of said time de-interleaver and bit de-interleaver by said received wireless digital signal;
means for determining an OFDM quarter-frame boundary when the said memory of said time de-interleaver and bit de-interleaver are full;
a Viterbi decoder that decodes bits from said time de-interleaver and said bit de-interleaver;
means for outputting the Viterbi decoding bits from said time de-interleaver and said bit de-interleaver when said OFDM quarter-frame boundary is detected;
means for obtaining a quarter-multiplexing frame boundary upon receipt of a first bit from said Viterbi decoder; and
means for synchronizing the OFDM frame based on the quarter-multiplexing frame boundary.
18. The system of claim 17, further comprising means for detecting whether a symbol number corresponding to a received OFDM symbol is any of symbol 0, symbol 0, symbol 204x, symbol 2*(204x), and symbol 3*(204x), where x is a reciprocal of a segment boundary.
19. The system of claim 18, wherein if it is detected that said symbol number is any of symbol 0, symbol 0, symbol 204x, symbol 2*(204x), and symbol 3*(204x), where x is a reciprocal of a segment boundary, said system further comprising means for determining that said OFDM segmented frame boundary is achieved.
20. The system of claim 17, wherein said descrambler starts descrambling only at quarter frame multiplexing.
21. The system of claim 17, wherein said segmented multiplexing frame boundary indicates a start of a transport packet.
22. The system of claim 17, further comprising means for performing additional decoding on the Viterbi decoded bits upon completion of the outputting of the Viterbi decoding bits from said time de-interleaver and said bit de-interleaver.
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 refrigerator comprising:
a power supply unit configured to power the refrigerator using commercial power;
a battery coupled to the power supply unit and configured to supply auxiliary power to the refrigerator;
a power detection unit coupled to the power supply unit and the battery and configured to detect whether power is being supplied from the power supply unit;
a driving unit to provide cold air; and
a controller configured to control an operational mode of the driving unit based on the detection at the power detection unit,
wherein, when the power supply unit is supplying power, the driving unit is controlled to operate in a normal operation mode, and when the power supply unit is not supplying power, the driving unit is controlled to operate in a power failure operation mode and controlling the power to be supplied from the battery.
2. The refrigerator according to claim 1, wherein the driving unit includes a compressor, an evaporator blower fan, a compressor blower fan, and a cool air adjustment damper.
3. The refrigerator according to claim 2, wherein the compressor includes a BLDC compressor that operates in the power failure operation mode at a power that is less than a power during the normal operation mode.
4. The refrigerator according to claim 1, further comprising a power converter coupled to the battery and the power detection unit to provide power from the battery to the power detection unit, wherein the power converter is manually manipulated.
5. The refrigerator according to claim 1, wherein the power detection unit and the power converter are mounted together in the refrigerator.
6. The refrigerator according to claim 1, wherein the power detection unit detects at least one of current, a voltage, a frequency, or a frequency component to compare the detected results to preset information.
7. The refrigerator according to claim 1, further comprising a display unit that displays a power failure state when the supplied power is switched from the power supply unit to the battery.
8. The refrigerator according to claim 1, wherein, in the power failure operation mode, the driving unit is controlled so that the driving unit operates at an input power that is less than that in the normal operation mode.
9. The refrigerator according to claim 8, wherein, in the power failure operation mode, the compressor is controlled so that an operational duration of the compressor per a unit time decreases when compared to an operational duration of the compressor in the normal operation mode.
10. The refrigerator according to claim 9, wherein, in the power failure operation mode, the operational duration per the unit time is controlled so that the operational duration decreases as a duration in the power failure operation mode increases.
11. The refrigerator according to claim 8, wherein, in the power failure operation mode, a defrosting operation is controlled so that the defrosting operation is not performed when a preset defrosting time arrives.
12. The refrigerator according to claim 8, wherein, in the power failure operation mode, when the compressor operates, the evaporator blower fan and the compressor blower fan are controlled so that operations of the evaporator blower fan and the compressor blower fan are stopped.
13. The refrigerator according to claim 8, wherein, in the power failure operation mode, when a prescribed amount of time elapses, the operation of the compressor is stopped and the evaporator blower fan is controlled to operate without the compressor.
14. The refrigerator according to claim 8, wherein, in the power failure operation mode, the evaporator blower fan is controlled so that the evaporator blower fan is turned onoff at a prescribed time interval.
15. The refrigerator according to claim 8, wherein, in the power failure operation mode, the operation of the compressor is controlled by comparing a detected temperature of a storage compartment to a prescribed temperature for a prescribed period of time, and
when the prescribed period of time elapses, the compressor is controlled so that the compressor is turned onoff at a prescribed time interval.
16. The refrigerator according to claim 8, wherein, in the power failure operation mode, the compressor is controlled by setting a control temperature so that the control temperature is greater than a set temperature in the normal operation mode, and comparing a detected inner temperature of the refrigerator to the control temperature.
17. The refrigerator according to claim 1, wherein, when the power detection unit is detected as supplying power, the power failure operation mode is released to return to the normal operation mode.
18. The refrigerator according to claim 1, wherein, when the power failure operation mode is changed to return to the normal operation mode and when a duration in the power failure operation mode is greater than a prescribed amount, the driving unit is controlled so that a target temperature is lower than a control temperature in the normal operation mode for a prescribed amount of time, and
after the prescribed amount of time elapses, the target temperature is reset to the control temperature in the normal operation mode.
19. A refrigerator comprising:
a power supply unit that supplies power using commercial power;
a battery connected to the power supply unit;
a power detection unit that detects whether power supplied from the commercial power supply unit has stopped;
a power converter that supplies battery power through the battery when the commercial power is not supplied by the power detection unit;
a thermal storage unit disposed on a side of a freezing compartment; and
a controller detecting a power failure at the power supply unit to supply the battery power through the power converter and change an operational mode from a normal operation mode to a power failure operation mode during the power failure to control a driving unit of the refrigerator.
20. The refrigerator according to claim 19, wherein, in the power failure operation mode, the compressor is turned onoff at a prescribed time interval, and a blower fan that blows cool air toward the thermal storage unit is controlled based on a detected inner temperature of the refrigerator.
21. The refrigerator according to claim 19, wherein, in the power failure operation mode, the blower fan is turned onoff by setting a control temperature so that the control temperature is greater than a target temperature set in the normal operation mode, and the refrigerator is controlled by comparing a detected inner temperature of the refrigerator to the control temperature.
22. The refrigerator according to claim 21, wherein, in the power failure operation mode, the control temperature is increased in stages according to elapsed time.
23. The refrigerator according to claim 19, wherein, when the power detection unit is detected as supplying power, the operational mode is changed from the power failure operation mode to the normal operation mode.
24. The refrigerator according to claim 23, wherein, when the power failure operation mode is changed to return to the normal operation mode and when a duration in the power failure operation mode is greater than a prescribed amount, the driving unit is controlled so that a target temperature is lower than a control temperature in the normal operation mode for a prescribed amount of time, and
after the prescribed amount of time elapses, the target temperature is reset to the control temperature in the normal operation mode.
25. The refrigerator according to claim 23, wherein, when a duration in the power failure operation mode is greater than a prescribed amount of time, performing a defrosting operation when the power is supplied using the commercial power.
26. The refrigerator according to claim 19, wherein a case that supports the refrigerator is separately disposed at a lower portion of the refrigerator, and
the battery, the power detection unit, and the power converter are disposed within the case.
27. The refrigerator according to claim 26, wherein a drawer is disposed within the case, and the battery is mounted in the drawer.
28. The refrigerator according to claim 19, wherein, when the power detection unit detects a failure in the power supply unit, a residual level of power in the battery is determined based on elapsed time in the power failure operation mode and displayed on a display.
29. The refrigerator according to claim 19, wherein, in the power failure operation mode, the driving unit is controlled to operate at a low rate.
30. The refrigerator according to claim 29, wherein, when the operational mode is changed to return from the power failure operation mode to the normal operation mode, a BLDC compressor operates at a high rate for a prescribed amount of time, and
when the prescribed amount of time elapses, the high-rate operation of the compressor is changed to the low-rate operation.
31. A refrigerator comprising:
a commercial power supply unit;
a battery coupled to the commercial power supply unit;
a power converter configured to supply auxiliary power through the battery when commercial power supplied from the commercial power supply unit is not provided;
a thermal storage unit disposed in a side of the refrigerator;
a first evaporation dish mounted above a compressor disposed in a prescribed compartment in the refrigerator to collect defrosted water drained within the refrigerator;
a second evaporation dish disposed on a bottom of the prescribed compartment; and
a first connection tube that connects the first evaporation dish to the second evaporation dish to allow the defrosted water to flow from the first evaporation dish to the second evaporation dish.
32. The refrigerator according to claim 31, further comprising a controller that detects a power failure in the commercial power supply unit and controls to supply the auxiliary power from the battery to the power converter, and change an operational mode of the refrigerator from a normal operation mode to a power failure operation mode.
33. The refrigerator according to claim 31, wherein the first evaporation dish is seated on a top surface of the compressor, and
a border that extends upward along a circumference of the first evaporation dish is disposed to define a water collection space.
34. The refrigerator according to claim 31, wherein a partition wall is disposed at a portion of the first evaporation dish, on which the first connection tube is disposed, to separate the first connection tube from the water collection space, and
when a level of the defrosted water collected into the first evaporation dish is above a predetermined level, the defrosting water is drained into the second evaporation dish.
35. The refrigerator according to claim 32, wherein a second connection tube connected to the bottom of the refrigerator is connected to the second evaporation dish to drain the defrosting water.
36. A refrigerator comprising:
a commercial power supply unit;
a battery coupled to the commercial power supply unit;
a power converter configured to supply auxiliary power through the battery when the commercial power supplied from the commercial power supply unit is not provided;
an evaporator disposed at a rear side of a storage space of the refrigerator to generate cool air;
a grill pan provided to partition the evaporator from the storage space;
a blower fan disposed above the evaporator to blow the cool air;
a thermal storage pack disposed between a front surface of the evaporator and the grill pan; and
a controller configured to detect a power failure in the commercial power supply and controls to supply the auxiliary power through the power converter and change an operational mode from a normal operation mode to a power failure operation mode to control an operation of the blower fan to supply the cool air from the thermal storage pack into the storage space.
37. The refrigerator according to claim 36, wherein, in the power failure operation mode, the blower fan is repeatedly turned onoff at a prescribed time interval.
38. The refrigerator according to claim 36, wherein, in the normal operation mode, the blower fan is controlled based on a detected inner temperature of the storage space.
39. The refrigerator according to claim 36, wherein the thermal storage pack is disposed to contact a front surface of the evaporator.
40. The refrigerator according to claim 39, wherein the thermal storage pack is fixed to a side of the grill pan, and a cooling pin of the evaporator contacts the thermal storage pack, and
a passage is provided within the storage space for air to pass through a space defined by the cooling pin and the thermal storage pack.
41. The refrigerator according to claim 36, further comprising:
a discharge hole defined in the grill pan to face the blower fan;
a cool air return duct that allows the storage space to communicate with the space in which the evaporator is disposed;
a frost attachment inducing plate disposed on the cool air return duct to induce generation of frost.
42. The refrigerator according to claim 41, wherein the frost attachment inducing plate is formed of a metal material and contacts a side of the evaporator to conduct heat.
43. The refrigerator according to claim 42, wherein the frost attachment inducing plate is connected to a defrost water receiver disposed under the evaporator to collect defrost water from the frost attachment inducing plate into the defrosting water receiver.