1. A self-rescue method for a damaged file system, comprising:
sending a fault warning message to a background server when it is found during boot of a device that a file system is damaged;
receiving, by the device, an acknowledgement message from the background server, wherein the acknowledgement message contains a path and file name of a backup version selected by the background server according to a product type; and
downloading, by the device, a version file, and rebooting from the version file.
2. The method according to claim 1, further comprising: backing up an address capable of ensuring communications between a foreground server and the background server to a private data area of a non-file system, when the device is powered on for the first time.
3. The method according to claim 2, further comprising: acquiring the address needed for the communications with the background server from the private data area of the non-file system, before the fault warning message is sent to the background server.
4. The method according to claim 2, further comprising: entering, by BOOT, an exception handling branch and recording an exception branch identifier, before the fault warning message is sent to the background server when it is found during boot of the device that the file system is damaged.
5. The method according to claim 4, further comprising: determining, by the device, whether the exception branch identifier recorded by BOOT is valid after the device reboots from the version file, in the case that the identifier is valid, reading the backup address to restore register.
6. The method according to claim 1, wherein the version file is downloaded via File Transfer Protocol (FTP) or Hyper Text Transfer Protocol (HTTP); and
the device sends the fault warning message to the background server via User Datagram Protocol (UDP) or Simple Network Management Protocol (SNMP).
7. A self-rescue device for a damaged file system, comprising a sending and receiving module, a downloading module and a boot module, wherein
the sending and receiving module is configured to send a fault warning message to a background server when it is found during boot of a device that a file system is damaged, and to receive an acknowledgment message from the background server, wherein the acknowledgment message contains a path and file name of a backup version selected by the background server according to a product type;
the downloading module is connected with the sending and receiving module and is configured to download a version file from the background server; and
the boot module is connected with the downloading module and is configured to reboot from the version file after the downloading is completed.
8. The device according to claim 7, wherein the sending and receiving module is further configured to back up an address capable of ensuring communications between a foreground server and the background server to a private data area of a non-file system, and to acquire the address needed for the communications with the background server from the private area of the non-file system.
9. The device according to claim 7, further comprising a control module, which is configured to control the device to enter an exception handling branch and record an exception branch identifier when it is found during boot of the device that the file system is damaged.
10. The device according to claim 9, wherein the control module is further configured to, after the device reboots from the version file, determine whether the recorded exception branch identifier is valid, and read the backup address to restore register in the case that the identifier is valid.
11. The device according to claim 7, wherein the downloading module is configured to download the version file from the background server via FTP or HTTP; and
the sending and receiving module is configured to send the fault warning message to the background server via UDP or SNMP.
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 device comprising:
a first transducer in a first speaker to receive a first signal;
a second transducer in a second speaker to receive a second signal, the second transducer being different in size than the first transducer; and
a filter to filter at least a frequency portion included in the first signal such that the first signal is provided to the first transducer after the frequency portion is filtered; and
wherein a third signal corresponding to the frequency portion filtered from the first signal is provided together with the second signal to the second transducer.
2. The device of claim 1, wherein the filter comprises a high pass filter configured to filter lower frequency ranges.
3. The device of claim 2, wherein the high pass filter is configured remove frequencies of approximately 60 to 200 Hz.
4. The device of claim 1, wherein the second speaker is mounted above the first speaker.
5. The device of claim 1, wherein the first and second speakers are arranged within a cylindrical housing and coaxially aligned about a center axis of the cylindrical housing.
6. The device of claim 1, wherein the first and second speakers are arranged horizontally in a spaced relationship.
7. A method comprising:
receiving a first signal and a second signal to be used to produce stereo sound;
filtering the first signal to filter at least a portion of frequencies;
providing the first signal to a first transducer in a first speaker after the first signal is filtered; and
providing the second signal, together with a third signal corresponding to the portion of frequencies filtered from the first signal, to a second transducer in a second speaker.
8. The method of claim 7, wherein the second signal is provided to the second transducer without filtering.
9. The method of claim 7, wherein filtering comprises applying a high pass filter to the first signal.
10. The method of claim 7, wherein filtering comprises filtering a frequency range of approximately 60 to 200 Hz.
11. A device comprising:
a processor mounted within the housing to process a first signal and second signal representation of an audio output;
a first speaker having a first transducer;
a filter to filter to pass a first frequency portion of the first signal to the first transducer of the first speaker and to filter a second frequency portion of the first signal; and
a second speaker having a second transducer to receive the second signal and the filtered frequency portion of the first signal, the second transducer being different in size than the first transducer.
12. The device of claim 11, wherein the second transducer is larger than the first transducer.
13. The device of claim 11, further comprising a housing and wherein the first and second speakers are arranged within a housing such that the second speaker is mounted above the first speaker.
14. The device of claim 11, further comprising a housing and wherein the first and second speakers are coaxially aligned within the housing.
15. The device of claim 11, further comprising a housing and wherein the first and second speakers are arranged horizontally within the housing in a spaced relationship.
16. The device of claim 11, wherein the filter comprises a high pass filter.
17. The device of claim 16, wherein the high pass filter is configured to filter frequencies of approximately 60 to 200 Hz.
18. The device of claim 11, wherein the high pass filter is configured to pass frequencies of approximately 200 to 1500 Hz.
19. The device of claim 11, wherein the first signal is a right channel signal and the second signal is a left channel signal.
20. The method of claim 7, wherein the portion of frequencies filtered from the first signal are approximately 200 to 1500 Hz.