Video transmission apparatus and control method for video transmission apparatus

• US 9,467,639 B2
• Filed: 02/27/2013
• Issued: 10/11/2016
• Est. Priority Date: 08/29/2008
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Ohnishi, Motoo, Tajiri, Katsutoshi
• Primary Examiner(s): Sam, Phirin
• Application Number:
  US13/779,664
• Publication Number:
  US 20130170547A1
• Time in Patent Office: 1,322 Days
• Field of Search: None
• US Class Current: 1/1
• 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 21/238 Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams hybrid fiber coaxial [HFC] networks for downstream channel allocation for video distribution H04L12/2801; flow control in packet networks H04L47/10; real-time communication protocols in data switching networks H04L65/00; scheduling or organising the servicing of application requests H04L67/60
• CPC Class Codes: H04N 21/8456 by decomposing the content in the time domain, e.g. in time segments
• CPC Class Codes: H04N 5/38 Transmitter circuitry for the transmission of television signals according to analogue transmission standards H04N5/14 takes precedence

Abstract

Waiting-for-transmission fragments that cannot be transmitted by a transmission unit due to the interruption of transmission by the transmission unit are stored. In accordance with the waiting-for-transmission fragments, a fragment to be transmitted prior to a first fragment including an intra-coded frame is eliminated from the waiting-for-transmission fragments. The transmission unit is controlled so that the first fragment is transmitted at the resumption of transmission.

Claims

1. A transmission apparatus for transmitting coded data including intra-coded frame data and inter-coded frame data, comprising:

a monitoring unit configured to monitor a transmission state of the coded data; and

a transmission unit configured to transmit the coded data, to omit to transmit the inter-coded frame data before the intra-coded frame data when a transmission trouble occurs, and to transmit the coded data from the intra-coded frame data without transmitting the inter-coded frame data before the intra-coded frame data.

2. The transmission apparatus according to claim 1, wherein the transmission unit transmits untransmitted inter-coded frame data to be decoded in accordance with intra-coded frame data transmitted before the transmission trouble occurs.

4. The transmission apparatus according to claim 1, wherein the transmission unit transmits the coded data read out from a storage unit, and further comprising a control unit configured to discard the inter-coded frame data from the storage unit in a unit of a fragment when the transmission trouble occurs.

5. The transmission apparatus according to claim 1, wherein the transmission unit transmits the coded data from the latest intra-coded frame data stored in a storage unit.

16. The transmission apparatus according to claim 1, wherein the transmission unit interrupts transmission of the coded data in accordance with a network trouble, and resumes the interrupted transmission of the coded data from the intra-coded frame data without transmitting the inter-coded frame data before the intra-coded frame data.

19. The transmission apparatus according to claim 1, wherein the transmission unit omits to transmit the inter-coded frame data in a case where a predetermined number of frames of coded data have not been transmitted by the transmission unit.

3. A transmission apparatus for transmitting coded data including intra-coded frame data and inter-coded frame data, comprising:

a storage unit configured to store coded data; and

a transmission unit configured to transmit the coded data stored in the storage unit, to omit to transmit the inter-coded frame data before the intra-coded frame data stored in the storage unit when a transmission trouble occurs, and to transmit the coded data from the intra-coded frame data stored in the storage unit when the transmission trouble occurs without transmitting the inter-coded frame data before the intra-coded frame data.

20. The transmission apparatus according to claim 3, wherein the transmission unit transmits the coded data from the latest intra-coded frame data stored in the storage unit.

25. The transmission apparatus according to claim 3, wherein the transmission unit transmits untransmitted inter-coded frame data to be decoded in accordance with intra-coded frame data transmitted before the transmission trouble occurs.

6. A transmission method performed by a transmission apparatus for transmitting coded data including intra-coded frame data and inter-coded frame data, the method comprising:

omitting to transmit the inter-coded frame data before the intra-coded frame data when a transmission trouble occurs; and

transmitting the coded data from the intra-coded frame data without transmitting the inter-coded frame data before the intra-coded frame data.

7. The transmission method according to claim 6, wherein the transmitting step transmits untransmitted inter-coded frame data to be decoded in accordance with intra-coded frame data transmitted before the transmission trouble occurs.

9. The transmission method according to claim 6, wherein the coded data read out from a storage unit is transmitted, and further comprising a discarding step of discarding the inter-coded frame data from the storage unit in a unit of a fragment when the transmission trouble occurs.

10. The transmission method according to claim 6, wherein the transmitting step transmits the coded data from the latest intra-coded frame data stored in a storage unit.

17. The transmission method according to claim 6, wherein the omitting step interrupts transmission of the coded data in accordance with a network trouble, and the transmitting step resumes the interrupted transmission of the coded data from the intra-coded frame data without transmitting the inter-coded frame data before the intra-coded frame data.

21. The transmission method according to claim 6, wherein the omitting step omits to transmit the inter-coded frame data in a case where a predetermined number of frames of coded data have not been transmitted.

8. A transmission method performed by a transmission apparatus for transmitting coded data including intra-coded frame data and inter-coded frame data, the method comprising:

storing coded data in a storage unit;

transmitting the coded data stored in the storage unit;

omitting to transmit the inter-coded frame data before the intra-coded frame data stored in the storage unit when a transmission trouble occurs; and

transmitting the coded data from the intra-coded frame data stored in the storage unit when the transmission trouble occurs without transmitting the inter-coded frame data before the intra-coded frame data.

22. The transmission method according to claim 8, wherein the transmitting step transmits the coded data from the latest intra-coded frame data stored in the storage unit.

26. The transmission method according to claim 8, wherein the transmission step transmits untransmitted inter-coded frame data to be decoded in accordance with intra-coded frame data transmitted before the transmission trouble occurs.

11. A non-transitory computer-readable storage medium storing a computer-executable process for transmitting coded data including intra-coded frame data and inter-coded frame data, comprising:

omitting to transmit the inter-coded frame data before the intra-coded frame data when a transmission trouble occurs; and

transmitting the coded data from the intra-coded frame data without transmitting the inter-coded frame data before the intra-coded frame data.

12. The non-transitory storage medium according to claim 11,

wherein the transmitting step transmits untransmitted inter-coded frame data to be decoded in accordance with intra-coded frame data transmitted before the transmission trouble occurs.

14. The non-transitory storage medium according to claim 11, wherein the coded data read out from a storage unit is transmitted, and further comprising a discarding step of discarding the inter-coded frame data from the storage unit in a unit of a fragment when the transmission trouble occurs.

15. The non-transitory storage medium according to claim 11, wherein the transmitting step transmits the coded data from the latest intra-coded frame data stored in a storage unit.

18. The storage medium according to claim 11, wherein the omitting step interrupts transmission of the coded data in accordance with a network trouble, and the transmitting step resumes the interrupted transmission of the coded data from the intra-coded frame data without transmitting the inter-coded frame data before the intra-coded frame data.

23. The non-transitory storage medium according to claim 11, wherein the omitting step omits to transmit the inter-coded frame data in a case where a predetermined number of frames of coded data have not been transmitted.

13. A non-transitory computer-readable storage medium storing a computer-executable process for transmitting coded data including intra-coded frame data and inter-coded frame data, comprising:

storing coded data in a storage unit;

transmitting the coded data stored in the storage unit;

omitting to transmit the inter-coded frame data before the intra-coded frame data stored in the storage unit when a transmission trouble occurs; and

transmitting the coded data from the intra-coded frame data stored in the storage unit when the transmission trouble occurs without transmitting the inter-coded frame data before the intra-coded frame data.

24. The non-transitory storage medium according to claim 13, wherein the transmitting step transmits the coded data from the latest intra-coded frame data stored in the storage unit.

27. The non-transitory storage medium according to claim 13, wherein the transmission step transmits untransmitted inter-coded frame data to be decoded in accordance with intra-coded frame data transmitted before the transmission trouble occurs.