TRANSMISSION APPARATUS, TRANSMISSION METHOD, RECEPTION APPARATUS, AND RECEPTION METHOD

• US 20150237175A1
• Filed: 06/23/2014
• Published: 08/20/2015
• Est. Priority Date: 07/05/2013
• Status: Active Grant

• Current Assignee: Saturn Licensing LLC (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Michael, Lachlan
• Granted Patent: US 10,225,379 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 65/70 Media network packetisation
• CPC Class Codes: H04L 69/04 Protocols for data compression, e.g. ROHC
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04N 21/236 Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream multiplexing of data packets for data networks, e.g. RTP/UDP H04L65/00
• CPC Class Codes: H04N 21/2381 Adapting the multiplex stream to a specific network, e.g. an Internet Protocol [IP] network transmission of MPEG streams over ATM H04L12/5601

Abstract

The present technique relates to a transmission apparatus, a transmission method, a reception apparatus, and a reception method which make it possible to control redundancy of a header in packet communication. A region representing a packet length in a header of a packet is switched and set according to a size of a payload of an input packet. That is, according to the packet length, switching between a short packet mode to represent the packet length only by five bits of a packet length part FH1-3 in a minimum fixed length header FH1, a variable length mode to represent the packet length by 11 bits of the packet length part FH1-3 and a packet length part VH1-1 in a variable length header VH1, and an additional variable length mode to represent the packet length by 16 bits of the packet length part FH1-3, the packet length part VH1-1, and a packet length part AH1-2 in an additional header AH1 is performed. The present technique can be applied to broadcast communication.

Claims

1. A transmission apparatus comprising:

a baseband packet generation unit configured to generate a baseband packet from an input packet or a stream;

a baseband flame generation unit configured to generate a baseband flame from the baseband packet; and

a transmission unit configured to transmit the baseband flame, wherein

a header of the baseband packet includes a minimum fixed length header including type identification information for identification of a type of the input packet or the stream and information of a packet length of the input packet or the stream stored in a payload of the baseband flame.

2. The transmission apparatus according to claim 1, wherein when the type identification information indicates that the type of the input packet or the stream is an IP packet, the minimum fixed length header includes, in addition to the type identification information, minimum fixed length identification information for identification whether the input packet length is a minimum fixed length, and minimum input packet length information as information of the input packet length.

3. The transmission apparatus according to claim 2, wherein when the minimum fixed length identification information indicates that the input packet length is not the minimum fixed length, the header includes a variable length header in addition to the minimum fixed length header, and

when the minimum input packet length information is set with a low bit of the input packet length as the minimum input packet length, the variable length header includes variable packet length information including a high bit thereof, a division frag. to indicate whether the input packet or the stream is divided and a baseband packet is configured, and an additional header frag. indicating whether there is an additional header to be added to the variable length header.

4. The transmission apparatus according to claim 3, wherein when the division frag. indicates that the input packet or the stream is divided and the baseband packet is configured, the variable length header further includes a division frag. header, and

the division frag. header includes a frag. ID for identification of the division frag., and a frag. counter to be information for identification of the divided baseband packet.

5. The transmission apparatus according to claim 3, wherein when the additional header frag. indicates that there is the additional header, the header includes the additional header in addition to the minimum fixed length header and the variable length header, and

the additional header includes additional header identification information for identification of a type of the additional header, extension packet length information including a bit higher than that of the variable packet length information representing the input packet length, and additional information header frag. indicating whether there is an additional information header.

6. The transmission apparatus according to claim 5, wherein when the additional information header frag. indicates that there is the additional information header, the header includes the additional information header, which includes predetermined information, in addition to the minimum fixed length header, the variable length header, and the additional header.

7. The transmission apparatus according to claim 5, wherein when the additional header identification information indicates label information, the header includes the additional information header, which includes predetermined label information, in addition to the minimum fixed length header, the variable length header, and the additional header.

8. The transmission apparatus according to claim 1, wherein the baseband packet generation unit identifies the type of the input packet or the stream, registers the identified type into a type identification part, and generates a baseband packet corresponding to the identified type.

9. The transmission apparatus according to claim 1, wherein the minimum input packet length information is information having a minimum fixed length and including bit information in which the number of bits corresponding to a minimum packet size is offset.

10. The transmission apparatus according to claim 1, wherein when the type identification information is a transport stream packet, the minimum fixed length header includes, in addition to the type identification information, null packet deletion information for identification whether a null packet in the transport stream packet is deleted and a baseband packet is configured, and information of the number of transport stream packets, which information indicates the number of transport stream packets, as information of the input packet length included in the baseband packet.

11. The transmission apparatus according to claim 10, wherein when the packet deletion information is information indicating that the null packet in the transport stream packet is deleted and the baseband packet is configured, the header further includes information indicating the number of deleted null packets.

12. The transmission apparatus according to claim 1, wherein the type identification information includes unspecified protocol information indicating a protocol other than that of information for specification of a protocol of the input packet or the stream, and

when the type identification information is the unspecified protocol information, the header includes, in addition to the minimum fixed length header, predetermined protocol information for specification of a predetermined protocol.

13. A transmission method comprising:

generating a baseband packet from an input packet or a stream;

generating a baseband flame from the baseband packet; and

transmitting the baseband flame, wherein

a header of the baseband packet includes a minimum fixed length header including type identification information for identification of a type of the input packet or the stream and information of a packet length of the input packet or the stream stored in a payload of the baseband flame.

14. A reception apparatus comprising:

a reception unit configured to receive a transmitted signal including a baseband flame;

a baseband packet generation unit configured to generate a baseband packet from the received baseband flame; and

an input packet generation unit configured to generate an input packet or a stream from the baseband packet, wherein

a header of the baseband packet includes a minimum fixed length header including type identification information for identification of a type of the input packet or the stream and information of a packet length of the input packet or the stream stored in a payload of the baseband flame.

15. A reception method comprising:

receiving a transmitted signal including a baseband flame;

generating a baseband packet from the received baseband flame; and

generating an input packet or a stream from the baseband packet, wherein

a header of the baseband packet includes a minimum fixed length header including type identification information for identification of a type of the input packet or the stream and information of a packet length of the input packet or the stream stored in a payload of the baseband flame.