Digital video recorder having appartus for receiving automatic switched image by recognizing source and method thereof

A DVR having a source recognition automatic switched image receiving apparatus, comprising:

• a path switching unit configured to receive an image signal not determined whether it is a SD signal or a HD-SDI signal, transmit an initial path to a HD-SDI signal compensating unit, the initial path designated under the presumption that the image signal is the HD-SDI signal, and switch the path to a SD analog decoder if it is determined that the image signal is the SD signal;
• a HD-SDI signal compensating unit configured to measure a loss of the image signal and automatically adjust a gain of the image signal to restore an attenuation of the image signal under the presumption that the image signal input from the path switching unit is the HD-SDI signal;
• a signal detecting unit configured to receive the image signal of less than one initial frame from the HD-SDI signal compensating unit, with the kind of the image signal unknown, detect whether the image signal is the HD-SDI signal or the SD signal according to a preset criterion, and provide the kind of the image signal to the path switching unit;
• a receiver configured to parallelize and decode the image signal input from the HD-SDI signal compensating unit;
• a SD analog decoder configured to decode the image signal input from the path switching unit, with the image signal determined as the SD signal;
• and
• an image processing unit configured to output an image decoded by the receiver or the SD analog decoder,
• wherein the HD-SDI signal compensating unit includes:
• an adaptive equalizer configured to measure a loss depending on a length of a coaxial cable and automatically adjust a gain depending on an attenuation;
• and
• a re-clocker configured to remove a jitter of the input image signal.

A DVR having a source recognition automatic switched image receiving apparatus, comprising:

• a path switching unit configured to receive an image signal not determined whether it is a SD signal or a HD-SDI signal, transmit an initial path to a HD-SDI signal compensating unit, the initial path designated under the presumption that the image signal is the HD-SDI signal, and switch the path to a SD analog decoder if it is determined that the image signal is the SD signal;
• a HD-SDI signal compensating unit configured to measure a loss of the image signal and automatically adjust a gain of the image signal to restore an attenuation of the image signal under the presumption that the image signal input from the path switching unit is the HD-SDI signal;
• a signal detecting unit configured to receive the image signal of less than one initial frame from the HD-SDI signal compensating unit, with the kind of the image signal unknown, detect whether the image signal is the HD-SDI signal or the SD signal according to a preset criterion, and provide the kind of the image signal to the path switching unit;
• a receiver configured to parallelize and decode the image signal input from the HD-SDI signal compensating unit;
• a SD analog decoder configured to decode the image signal input from the path switching unit, with the image signal determined as the SD signal;
• and
• an image processing unit configured to output an image decoded by the receiver or the SD analog decoder,
• wherein the HD-SDI signal compensating unit processes an image signal of a digital image transmission standard of HD-SDI (High Definition Serial Digital Interface) of more than gigahertz unit.

A DVR having a source recognition automatic switched image receiving apparatus, comprising:

• a path switching unit configured to receive an image signal not determined whether it is a SD signal or a HD-SDI signal, transmit an initial path to a HD-SDI signal compensating unit, the initial path designated under the presumption that the image signal is the HD-SDI signal, and switch the path to a SD analog decoder if it is determined that the image signal is the SD signal;
• a HD-SDI signal compensating unit configured to measure a loss of the image signal and automatically adjust a gain of the image signal to restore an attenuation of the image signal under the presumption that the image signal input from the path switching unit is the HD-SDI signal;
• a signal detecting unit configured to receive the image signal of less than one initial frame from the HD-SDI signal compensating unit, with the kind of the image signal unknown, detect whether the image signal is the HD-SDI signal or the SD signal according to a preset criterion, and provide the kind of the image signal to the path switching unit;
• a receiver configured to parallelize and decode the image signal input from the HD-SDI signal compensating unit;
• a SD analog decoder configured to decode the image signal input from the path switching unit, with the image signal determined as the SD signal;
• and
• an image processing unit configured to output an image decoded by the receiver or the SD analog decoder,
• wherein the HD-SDI signal compensating unit and the receiver are integrated into a single chip and the signal detecting unit receives the image signal between the HD-SDI signal compensating unit and the receiver and detects the kind of the image signal.

A DVR having a source recognition automatic switched image receiving apparatus, comprising:

• a path switching unit configured to receive an image signal not determined whether it is a SD signal or a HD-SDI signal, transmit an initial path to a HD-SDI signal compensating unit, the initial path designated under the presumption that the image signal is the HD-SDI signal, and switch the path to a SD analog decoder if it is determined that the image signal is the SD signal;
• a HD-SDI signal compensating unit configured to measure a loss of the image signal and automatically adjust a gain of the image signal to restore an attenuation of the image signal under the presumption that the image signal input from the path switching unit is the HD-SDI signal;
• a signal detecting unit configured to receive the image signal of less than one initial frame from the HD-SDI signal compensating unit, with the kind of the image signal unknown, detect whether the image signal is the HD-SDI signal or the SD signal according to a preset criterion, and provide the kind of the image signal to the path switching unit;
• a receiver configured to parallelize and decode the image signal input from the HD-SDI signal compensating unit;
• a SD analog decoder configured to decode the image signal input from the path switching unit, with the image signal determined as the SD signal;
• an image processing unit configured to output an image decoded by the receiver or the SD analog decoder;
• and
• a control unit configured to control operation of the signal detecting unit, the receiver and the SD analog decoder.

A DVR having a source recognition automatic switched image receiving apparatus, comprising:

• a path switching unit configured to receive an image signal not determined whether it is a SD signal or a HD-SDI signal, transmit an initial path to a HD-SDI signal compensating unit, the initial path designated under the presumption that the image signal is the HD-SDI signal, and switch the path to a SD analog decoder if it is determined that the image signal is the SD signal;
• a HD-SDI signal compensating unit configured to measure a loss of the image signal and automatically adjust a gain of the image signal to restore an attenuation of the image signal under the presumption that the image signal input from the path switching unit is the HD-SDI signal;
• a signal detecting unit configured to receive the image signal of less than one initial frame from the HD-SDI signal compensating unit, with the kind of the image signal unknown, detect whether the image signal is the HD-SDI signal or the SD signal according to a preset criterion, and provide the kind of the image signal to the path switching unit;
• a receiver configured to parallelize and decode the image signal input from the HD-SDI signal compensating unit;
• a SD analog decoder configured to decode the image signal input from the path switching unit, with the image signal determined as the SD signal;
• and
• an image processing unit configured to output an image decoded by the receiver or the SD analog decoder,
• wherein the signal detecting unit uses a frequency band or signal format of the image signal to detect whether the image signal is the SD signal or the HD-SDI signal.

A source recognition automatic switched image receiving method of a DVR having a source recognition automatic switched image receiving apparatus, comprising the steps of:

• a) by a path switching unit, receiving an image signal not determined whether it is a SD signal or a HD-SDI signal, transmitting an initial path to a HD-SDI signal compensating unit, the initial path designated under the presumption that the image signal is the HD-SDI signal, and switching the path to a SD analog decoder if it is determined that the image signal is the SD signal;
• b) by a HD-SDI signal compensating unit, measuring a loss of the image signal and automatically adjusting a gain of the image signal to restore an attenuation of the image signal under the presumption that the image signal input from the path switching unit is the HD-SDI signal;
• c) by a signal detecting unit, receiving the image signal of less than one initial frame from the HD-SDI signal compensating unit, with the kind of the image signal unknown, detecting whether the image signal is the HD-SDI signal or the SD signal according to a preset criterion, and providing the kind of the image signal to the path switching unit;
• d) by a receiver, parallelizing and decoding the image signal input from the HD-SDI signal compensating unit;
• e) by a SD analog decoder, decoding the image signal input from the path switching unit, with the image signal determined as the SD signal;
• and
• f) by an image processing unit, outputting an image decoded by the receiver or the SD analog decoder,
• wherein, in the step c), the signal detecting unit receives the image signal between the HD-SDI signal compensating unit and the receiver and detects the kind of the image signal.