VIDEO TRANSMISSION APPARATUS AND CONTROL METHOD FOR VIDEO TRANSMISSION APPARATUS

• US 20130170547A1
• Filed: 02/27/2013
• Published: 07/04/2013
• 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
• Granted Patent: US 9,467,639 B2
• Time in Patent Office: Days
• US Class Current: 375/240.12
• 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 comprising:

a storage unit configured to store waiting-for-transmission frames;

a transmission unit configured to transmit intra-coded frames and inter-coded frames; and

a control unit configured to control the transmission unit such that transmission is resumed from an intra-coded frame included in the waiting-for-transmission frames in a case where transmission of the waiting-for-transmission frames is suspended.

2. The transmission apparatus according to claim 1, wherein the control unit controls the transmission unit such that an untransmitted frame to be decoded in accordance with an intra-coded frame transmitted before suspension of the waiting-for-transmission frame is transmitted.

3. The transmission apparatus according to claim 1, wherein in a case where the number of frames that have not been transmitted by the transmission unit has reached a predetermined number and the transmission of the waiting-for-transmission frames is resumed, the control unit controls the transmission unit such that transmission is resumed from the intra-coded frame included in the waiting-for-transmission frames.

4. The transmission apparatus according to claim 1, wherein the control unit controls the transmission unit such that frames are discarded from the waiting-for-transmission frames in a unit of a fragment.

5. The transmission apparatus according to claim 1, wherein the control unit controls the transmission unit such that transmission is resumed from the latest intra-coded frame in the waiting-for-transmission frames in a case where transmission of the waiting-for-transmission frames is suspended.

6. A transmission method performed by a transmission apparatus, the method comprising:

a storing step of storing waiting-for-transmission frames;

a transmitting step of transmitting intra-coded frames and inter-coded frames; and

a control step of controlling the transmitting step to transmit such that transmission is resumed from an intra-coded frame included in the waiting-for-transmission frames in a case where transmission of the waiting-for-transmission frames is suspended.

7. The transmission method according to claim 6, wherein the control step controls the transmitting step such that an untransmitted frame to be decoded in accordance with an intra-coded frame transmitted before suspension of the waiting-for-transmission frame is transmitted.

8. The transmission method according to claim 6, wherein in a case where the number of frames that have not been transmitted in the transmitting step has reached a predetermined number and the transmission of the waiting-for-transmission frames is resumed, the control step controls the transmitting step such that transmission is resumed from the intra-coded frame included in the waiting-for-transmission frames.

9. The transmission method according to claim 6, wherein the control step controls the transmitting step such that frames are discarded from the waiting-for-transmission frames in a unit of a fragment.

10. The transmission method according to claim 6, wherein the control step controls the transmitting step such that transmission is resumed from the latest intra-coded frame in the waiting-for-transmission frames in a case where transmission of the waiting-for-transmission frames is suspended.

11. A non-transitory storage medium having a computer-readable program recorded thereon, the program comprising:

a storage step of storing waiting-for-transmission frames;

a transmitting step of transmitting intra-coded frames and inter-coded frames; and

a control step of controlling the transmitting step such that transmission is resumed from an intra-coded frame included in the waiting-for-transmission frames in a case where transmission of the waiting-for-transmission frames is suspended.

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

wherein the control step controls the transmitting step such that an untransmitted frame to be decoded in accordance with an intra-coded frame transmitted before suspension of the waiting-for-transmission frame is transmitted.

13. The non-transitory storage medium according to claim 11, wherein in a case where the number of frames that have not been transmitted in the transmitting step has reached a predetermined number and the transmission of the waiting-for-transmission frames is resumed, the control step controls the transmitting step such that the intra-coded frame included in the waiting-for-transmission frames.

14. The non-transitory storage medium according to claim 11, wherein the control step controls the transmitting step such that frames are discarded from the waiting-for-transmission frames in a unit of a fragment.

15. The non-transitory storage medium according to claim 11, wherein the control step controls the transmitting step such that transmission is resumed from the latest intra-coded frame in the waiting-for-transmission frames in a case where transmission of the waiting-for-transmission frames is suspended.