METHOD AND APPARATUS FOR CONTROLLING INTRA-REFRESHING IN A VIDEO TELEPHONY COMMUNICATION SYSTEM
First Claim
1. A method for requesting intra-refreshing in a video telephone communication system, the method comprising:
- checking, by a reception apparatus, a sequence number and a Cyclic Redundancy Check (CRC) for received video packet data to detect presence of a packet loss;
decoding the received video packet data to check frame type information;
generating a control signal for requesting intra-refreshing in accordance with the checked frame type information and the sequence number; and
transmitting the generated control signal for requesting intra-refreshing to a transmission apparatus.
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Accused Products
Abstract
A method and apparatus for controlling intra-refreshing in a video telephone communication system are provided. A reception apparatus checks a sequence number and a CRC for received video packet data to detect presence of a packet loss, decodes the received video data to check frame type information, generates a control signal for requesting intra-refreshing in accordance with the checked frame type information and the sequence number, and transmits the generated control signal for requesting intra-refreshing to a transmission apparatus. The transmission apparatus determines whether a control signal for requesting transmission of an I-frame obtained by compressing an independent image is received from the reception apparatus, checks frame type information and a sequence number of video data being compressed, determines whether to transmit a temporary I-frame corresponding to the received control signal or to transmit an I-frame based on a predetermined period, in accordance with the checked frame type information and the sequence number, and transmits the I-frame to the reception apparatus using a variable time according to the determination.
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Citations
19 Claims
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1. A method for requesting intra-refreshing in a video telephone communication system, the method comprising:
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checking, by a reception apparatus, a sequence number and a Cyclic Redundancy Check (CRC) for received video packet data to detect presence of a packet loss; decoding the received video packet data to check frame type information; generating a control signal for requesting intra-refreshing in accordance with the checked frame type information and the sequence number; and transmitting the generated control signal for requesting intra-refreshing to a transmission apparatus. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A reception apparatus for requesting intra-refreshing in a video telephone communication system, the apparatus comprising:
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an error detection block for checking a Cyclic Redundancy Check (CRC) attached to received video data to detect an error, and checking a sequence number of the received video data; a decoder for decoding the error-detected video data to check frame type information; and a controller for generating a control signal for requesting intra-refreshing in accordance with the checked frame type information and the sequence number, and transmitting the generated control signal for requesting intra-refreshing to a transmission apparatus. - View Dependent Claims (9, 10)
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11. A method for transmitting by a transmission apparatus an I-frame obtained by compressing an independent image in response to a request for intra-refreshing in a video telephone communication system, the method comprising:
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determining whether a control signal for requesting transmission of an I-frame obtained by compressing an independent image is received from a reception apparatus; checking frame type information and a sequence number of video data being compressed; determining whether to transmit a temporary I-frame corresponding to the received control signal or to transmit an I-frame based on a predetermined period, in accordance with the checked frame type information and the sequence number; and transmitting the I-frame to the reception apparatus using a variable time according to the determination. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A transmission apparatus for transmitting an I-frame obtained by compressing an independent image in response to a request for intra-refreshing in a video telephone communication system, the apparatus comprising:
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a controller for determining whether a control signal for requesting transmission of an I-frame obtained by compressing an independent image is received from a reception apparatus, checking frame type information and a sequence number of video data being compressed, and determining whether to transmit a temporary I-frame corresponding to the received control signal or to transmit an I-frame based on a predetermined period, in accordance with the checked frame type information and the sequence number; and an encoder for compressing video data into an independent image using a variable time and transmitting the video data to the reception apparatus according to the determination of the controller. - View Dependent Claims (18, 19)
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Specification