Synchronizing the storing of streaming video

• US 9,832,498 B2
• Filed: 10/10/2014
• Issued: 11/28/2017
• Est. Priority Date: 06/18/2012
• Status: Active Grant

• Current Assignee: Axis AB (Canon Inc.)
• Original Assignee: Axis AB (Canon Inc.)
• Inventors: Calvert, Kerry
• Primary Examiner(s): TRAN, THAI Q
• Assistant Examiner(s): Smith, Stephen
• Application Number:
  US14/512,174
• Publication Number:
  US 20150030306A1
• Time in Patent Office: 1,145 Days
• Field of Search: 386210, 386224, 386248, 386351, 348143, 348159, 709232
• CPC Class Codes: H04L 65/612 for unicast
• CPC Class Codes: H04L 65/752 adapting media to network capabilities
• CPC Class Codes: H04L 65/80 Responding to QoS
• CPC Class Codes: H04N 21/2187 Live feed
• CPC Class Codes: H04N 21/23106 involving caching operations prefetching while addressing of a memory level in which the access to the desired data or data block requires associative addressing means within memory systems or architectures G06F12/0862; caching at an intermediate stage in a data network H04L67/568
• CPC Class Codes: H04N 21/242 Synchronization processes, e.g. processing of PCR [Program Clock References] arrangements for synchronising broadcast or distribution via plural systems in broadcast distribution systems H04H20/18
• CPC Class Codes: H04N 21/26216 involving the channel capacity, e.g. network bandwidth admission control, resource allocation in open networks H04L12/5692; flow control in packet networks H04L47/10; establishing a schedule or organising the servicing of application requests taking into account QoS H04L67/61
• CPC Class Codes: H04N 21/64322 IP
• CPC Class Codes: H04N 21/8456 by decomposing the content in the time domain, e.g. in time segments
• CPC Class Codes: H04N 5/76 Television signal recording
• CPC Class Codes: H04N 5/765 Interface circuits between an apparatus for recording and another apparatus
• CPC Class Codes: H04N 5/772 the recording apparatus and the television camera being placed in the same enclosure
• CPC Class Codes: H04N 7/183 for receiving images from a single remote source
• CPC Class Codes: H04N 9/79 Processing of colour television signals in connection with recording

Abstract

A method, system, and computer-readable medium for synchronizing video are described. The system captures video data with a camera, the video data including a first video data segment and a second video data segment. When a network between the camera and a hub is insufficient to allow downstream real-time streaming of the video data, the system stores the first video data segment on a first storage. When the network is sufficient to allow downstream real-time streaming of the video data, the system transfers the second video data segment from the camera to the hub, reads the first video data segment from the first storage, and transfers the first video data segment to the hub. The system stores the video data segments onto a second storage such that a non-real-time playback from the second storage shows the first video data segment and the second video data segment in sequence.

Claims

1. A method for synchronizing video comprising:

capturing video data with a camera, the video data including a first video data segment and a second video data segment;

when a network between the camera and a hub is insufficient to allow downstream realtime streaming of the video data, storing the first video data segment on a first storage of the camera;

when the network between the camera and the hub is sufficient to allow downstream realtime streaming of the video data,

transferring the second video data segment from the camera over the network to the hub for playback in real time,

storing the second video data segment into a buffer at the hub while streaming the second video data segment to a player for live streaming;

storing the second video data segment from the buffer to a second storage at the hub, wherein the second storage at the hub stores an indication that the first data segment is not stored at the second storage at the hub;

reading the first video data segment from the first storage,

transferring the first video data segment over the network to the hub;

storing the first video data segment onto the second storage at the hub such that a non-real-time playback from the second storage shows the first video data segment and the second video data segment as one continuous video data in proper time sequence.

2. The method of claim 1, further comprising:

displaying a copy of the second video data segment to a viewer in real time during the transferring of the second video data segment.

3. The method of claim 1, wherein the storing onto the second storage includes constructing a hash table that catalogs and relates the video data segments to respective time segments.

4. The method of claim 1, wherein when the network has sufficient bandwidth for real-time streaming of the video data during the second time segment occurring after the first time segment, the hub is configured to send control data to the camera requesting the steps of reading the first video data segment and transferring the first video data segment.

5. A network camera system for synchronizing video comprising:

a hub including a second storage;

a camera including a first storage, the camera configured to;

capture video data including a first video data segment and a second video data segment,

store the first video data segment on a first storage when a network is unable to provide for real-time streaming of the video data, and

when the network is able to provide for the downstream real-time streaming of the video data, transfer the second video data segment over the network to the hub for playback in real time, storing the second video data segment into a buffer at the hub while streaming the second video data segment to a player for live streaming, storing the second video data segment from the buffer to a second storage at the hub, wherein the second storage at the hub stores an indication that the first data segment is not stored at the second storage at the hub, read the first video data segment from the first storage, and transfer the first video data segment over the network to the hub,

wherein the hub is configured to store the first video data segment onto the second storage at the hub such that a non-real-time playback from the second storage shows the first video data segment and the second video data segment as one continuous video data in proper time sequence.

6. The network camera system of claim 5, wherein the hub is configured to store the first video data segment and the second video data segment by constructing a hash table that catalogs and relates the video data segments to respective time segments.

7. A non-transitory computer-readable medium storing instructions which, when executed by a processor, causes a network camera system to execute a video synchronization method comprising:

capturing video data with a camera, the video data including a first video data segment and a second video data segment;

when a network between the camera and a hub is insufficient to allow downstream realtime streaming of the video data, storing the first video data segment on a first storage of the camera;

when the network between the camera and the hub is sufficient to allow downstream realtime streaming of the video data,

transferring the second video data segment from the camera over the network to the hub for playback in real time,

storing the second video data segment into a buffer at the hub while streaming the second video data segment to a player for live streaming;

storing the second video data segment from the buffer to a second storage at the hub, wherein the second storage at the hub stores an indication that the first data segment is not stored at the second storage at the hub;

reading the first video data segment from the first storage,

transferring the first video data segment over the network to the hub;

storing the first video data segment onto the second storage at the hub such that a non-real-time playback from the second storage shows the first video data segment and the second video data segment as one continuous video data in proper time sequence.

8. The non-transitory computer-readable medium of claim 7, the video synchronization method further comprising:

displaying a copy of the second video data segment to a viewer in real time during the transferring of the second video data segment.

9. The non-transitory computer-readable medium of claim 7, wherein the storing onto the second storage includes constructing a hash table that catalogs and relates the video data segments to respective time segments.