Abstract: An efficient retransmission control method, whereby a wasteful retransmission request and retransmission of a packet are not carried out when packet loss occurs. A receiving unit sends the received retransmission request information to a retransmission determining unit. When receiving the retransmission request information, the retransmission determining unit reads out refresh data time information, packet type information of the packet for which a retransmission request is issued, and the time information thereof from a packet information monitoring unit. The retransmission determining unit makes a determination as to whether or not to issue a retransmission request using the read-out refresh data time information, packet type information of the packet for which a retransmission request is issued, and the time information thereof.

Abstract: According to one embodiment, the invention provides a video reproduction device including a conversion module which is controlled to be selectively switched among a normal reproduction state in which an interlaced video signal is converted into a progressive video signal, an image quality priority reproduction state in which the interlaced video signal is converted into a progressive video signal of a higher quality than that in the normal reproduction state, and a motion priority reproduction state in which the interlaced video signal is output without being converted into a progressive video signal, and a control module which switches each state of the conversion module, in response to the reproduction speed of the reproduced interlaced video signal.

Abstract: An efficient retransmission control method, whereby a wasteful retransmission request and retransmission of a packet are not carried out when packet loss occurs. A receiving unit sends the received retransmission request information to a retransmission determining unit. When receiving the retransmission request information, the retransmission determining unit reads out refresh data time information, packet type information of the packet for which a retransmission request is issued, and the time information thereof from a packet information monitoring unit. The retransmission determining unit makes a determination as to whether or not to issue a retransmission request using the read-out refresh data time information, packet type information of the packet for which a retransmission request is issued, and the time information thereof.

Abstract: A communications unit carries out communications with server via network. A buffer memory temporarily stores the data which the communications unit downloads from the server via the network. A decoding unit decodes the data read from the buffer memory. A control unit individually sets reproduction start threshold ths used to determine start of decoding the received data after start of the communications and BUF threshold thu used to determine interruption of decoding after start of decoding the data, to control operations of the decoding unit.