DATA COMMUNICATION SYSTEM, DATA TRANSMISSION APPARATUS, DATA RECEIVING APPARATUS, DATA COMMUNICATION METHOD, DATA TRANSMISSION METHOD, RECEIVED-DATA PROCESSING METHOD, AND COMPUTER PROGRAM

• US 20070206592A1
• Filed: 05/10/2007
• Published: 09/06/2007
• Est. Priority Date: 11/12/2001
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Itakura, Eisaburo, Fukuhara, Takahiro, Ichino, Yasuhiko
• Granted Patent: US 7,577,093 B2
• Time in Patent Office: Days
• US Class Current: 370/389
• CPC Class Codes: H04N 19/63 using sub-band based transform, e.g. wavelets
• CPC Class Codes: H04N 21/234327 by decomposing into layers, e.g. base layer and one or more enhancement layers
• CPC Class Codes: H04N 21/234354 by altering signal-to-noise ratio parameters, e.g. requantization
• CPC Class Codes: H04N 21/234363 by altering the spatial resolution, e.g. for clients with a lower screen resolution
• CPC Class Codes: H04N 21/23614 Multiplexing of additional data and video streams arrangements for simultaneous broadcast of plural pieces of information H04H20/28
• CPC Class Codes: H04N 21/25808 Management of client data terminal profiles in network data switching protocols H04L67/303
• CPC Class Codes: H04N 21/2662 Controlling the complexity of the video stream, e.g. by scaling the resolution or bitrate of the video stream based on the client capabilities
• CPC Class Codes: H04N 21/6375 for requesting retransmission , e.g. of data packets lost or corrupted during transmission from serverARQ protocols H04L1/18; implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP] H04L69/16
• CPC Class Codes: H04N 21/6405 Multicasting data broadcast and multicast in packet switching networks H04L12/18
• CPC Class Codes: H04N 21/64322 IP
• CPC Class Codes: H04N 21/6582 Data stored in the client, e.g. viewing habits, hardware capabilities, credit card number arrangements where receivers interact with the broadcast H04H20/38

Abstract

A system allows data transfer in which the most appropriate packet processing is executed according to the performance of a terminal. A data transmission side stores scalable-encoded data in a packet as a payload, assigns priority-level information corresponding to a layer level of the encoded data stored in the packet to a packet header, and transmits the packet. A data receiving side performs processing by referring to the priority-level information. A level of priority dependent on an application is specified in an RTP payload header according to the degree of importance of scalable-encoded data, and a level of priority is further specified in an IP header. The most appropriate packet processing based on the performance of a terminal is allowed. Re-transmission control based on the layer level of encoded data is also allowed.

Claims

1-59. -59. (canceled)

60. A data receiving apparatus for receiving packets which store encoded data, comprising:

receiving parts for receiving packets which store data scalable-encoded by wavelet transform;

packet-priority-level-information determination parts for determining whether the packets have the information of a level of priority equal to or larger than a value specified according to a processing performance of the data receiving apparatus, wherein the information of a level of priority corresponds to a layer of the data according to a priority-level setting map in which the layer of the data is associated with a level of priority and is stored as additional information of the packet; and

decoding parts for decoding data stored in packets selected by the packet-priority-level-information determination parts.

61. A data receiving apparatus as claimed in claim 60, wherein the information of a level of priority corresponding to the layer of the data is stored in an RTP header.

62. A data transmission apparatus as claimed in claim 60, wherein the information of a level of priority corresponding to the layer of the data is stored in an IP header.

63. A data transmission apparatus as claimed in claim 60, wherein the information of a level of priority corresponding to the layer of the data is stored in an RTP header and an IP header.

64. A data receiving apparatus as claimed in claim 60, wherein the data receiving apparatus further includes a structure for transmitting receiving-terminal information to a data transmission apparatus.

65. A data receiving apparatus as claimed in claim 60, wherein the information of a level of priority corresponding to the layer of the data is changed according to a network condition.

66. A data receiving apparatus as claimed in claim 60, wherein the data receiving apparatus further includes a re-transmission control structure for transmitting a packet re-transmission request to a data transmission apparatus.

67. A data receiving apparatus as claimed in claim 60, wherein the packet-priority-level-information determination parts include IP packet filtering parts for determining a level of priority assigned to an IP header of a received packet, and RTP-packet-header scanning parts for determining a level of priority assigned to an RTP header of the received packet.

68. A data receiving apparatus for receiving packets which store encoded data, comprising:

receiving parts for receiving packets which store data scalable-encoded by wavelet transform, wherein the encoded data has different spatial resolutions generated by the wavelet transform;

packet-priority-level-information determination parts for determining whether the packets have the information of a level of priority equal to or larger than a value specified according to a processing performance of the data receiving apparatus, wherein the information of a level of priority corresponds to layers of different spatial resolutions and is stored as additional information of the packet; and

decoding parts for decoding data stored in packets selected by the packet-priority-level-information determination parts.

69. A data receiving apparatus as claimed in claim 68, wherein the information of a level of priority corresponding to the layer of the data is stored in an RTP header.

70. A data transmission apparatus as claimed in claim 68, wherein the information of a level of priority corresponding to the layer of the data is stored in an IP header.

71. A data transmission apparatus as claimed in claim 68, wherein the information of a level of priority corresponding to the layer of the data is stored in an RTP header and an IP header.

72. A data receiving apparatus as claimed in claim 68, wherein the data receiving apparatus further includes a structure for transmitting receiving-terminal information to a data transmission apparatus.

73. A data receiving apparatus as claimed in claim 68, wherein the information of a level of priority corresponding to the layer of the data is changed according to a network condition.

74. A data receiving apparatus as claimed in claim 68, wherein the data receiving apparatus further includes a re-transmission control structure for transmitting a packet re-transmission request to a data transmission apparatus.

75. A data receiving apparatus as claimed in claim 68, wherein the packet-priority-level-information determination parts include IP packet filtering parts for determining a level of priority assigned to an IP header of a received packet, and RTP-packet-header scanning parts for determining a level of priority assigned to an RTP header of the received packet.

76. A data receiving apparatus for receiving packets which store encoded data, comprising:

receiving parts for receiving packets which store data scalable-encoded by progressive encoding processing;

packet-priority-level-information determination parts for determining whether the packets have the information of a level of priority equal to or larger than a value specified according to a processing performance of the data receiving apparatus, wherein the information of a level of priority corresponds to a layer specified for a progressive order of the data and is stored as additional information of the packet; and

decoding parts for decoding data stored in packets selected by the packet-priority-level-information determination parts.

77. A data receiving apparatus as claimed in claim 76, wherein the information of a level of priority corresponding to the layer of the data is stored in an RTP header.

78. A data transmission apparatus as claimed in claim 76, wherein the information of a level of priority corresponding to the layer of the data is stored in an IP header.

79. A data transmission apparatus as claimed in claim 76, wherein the information of a level of priority corresponding to the layer of the data is stored in an RTP header and an IP header.

80. A data receiving apparatus as claimed in claim 76, wherein the data receiving apparatus further includes a structure for transmitting receiving-terminal information to a data transmission apparatus.

81. A data receiving apparatus as claimed in claim 76, wherein the information of a level of priority corresponding to the layer of the scalable-encoded data of the image signal is changed according to a network condition.

82. A data receiving apparatus as claimed in claim 76, wherein the data receiving apparatus further includes a re-transmission control structure for transmitting a packet re-transmission request to a data transmission apparatus.

83. A data receiving apparatus as claimed in claim 76, wherein the progressive encoding processing specifies different spatial resolutions in a progressive order, and the information of a level of priority corresponds to a layer specified for each spatial resolution of the data.

84. A data receiving apparatus as claimed in claim 76, wherein the progressive encoding processing specifies different SNRs in a progressive order, and the information of a level of priority corresponds to a layer specified for each SNR of the data.

85. A data receiving apparatus as claimed in claim 76, wherein the progressive encoding processing specifies different color components in a progressive order, and the information of a level of priority corresponds to a layer specified for each color component of the data.

86. A data receiving apparatus as claimed in claim 76, wherein the packet-priority-level-information determination parts include IP packet filtering parts for determining a level of priority assigned to an IP header of a received packet, and RTP-packet-header scanning parts for determining a level of priority assigned to an RTP header of the received packet.