Synchronizing the storing of streaming video

Patent metadata

Field	Value
Publication number	US-10659829-B2
Application number	US-201715796144-A
Country	US
Kind code	B2
Filing date	Oct 27, 2017
Priority date	Jun 18, 2012
Publication date	May 19, 2020
Grant date	May 19, 2020

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.

First claim

What is claimed is:

1. A method for synchronizing video in a wireless hub device, the method comprising:
receiving timestamped first video data from a wearable camera via a first wireless connection, wherein the first video data is organized using a hash table;
storing the first video data in a storage;
live streaming the first video data to a remote client via a second wireless connection;
detecting an interruption in the first wireless connection;
generating an indication of video data not received from the wearable camera as a result of the interruption;
after a resumption in the first wireless connection, receiving timestamped second video data corresponding to the video data not received from the wearable camera as a result of the interruption, wherein the second video data is organized using the hash table;
storing the second video data in the storage according to gap synchronization based on one or more timestamps of the first video data and one or more timestamps of the second video data; and
live streaming the second video data to the remote client via the second wireless connection after the resumption in the first wireless connection.

2. The method of claim 1 , wherein receiving the second video data comprises:
responsive to the resumption of the first wireless connection, requesting video blocks indicated by the indication of the video data not received, from the wearable camera.

3. The method of claim 1 , wherein receiving the second video data comprises:
receiving the second video data without requesting the second video data from the wearable camera.

4. The method of claim 1 , wherein:
the second video data is transferred from the wearable camera over a third wireless connection, the first wireless connection being more time-sensitive than the third wireless connection.

5. The method of claim 1 , further comprising:
prior to the resumption in the first wireless connection, transmitting the first video data to the remote client for playback using a keyframe index.

6. The method of claim 5 , further comprising:
causing playback of video at a fast rate by skipping frames based on the keyframe index.

7. A system for synchronizing video, the system comprising:
a wireless hub device, including a streaming media server and a storage,
wherein the streaming media server is configured to:
receive timestamped first video data from a wearable camera via a first wireless connection, wherein the first video data is organized using a hash table;
live stream the first video data to a remote client via a second wireless connection;
detect an interruption in the first wireless connection;
generate an indication of video data not received from the wearable camera as a result of the interruption;
after a resumption in the first wireless connection, receive timestamped second video data corresponding to the video data not received from the wearable camera as a result of the interruption, wherein the second video data is organized using the hash table; and
live stream the second data to the remote client via the second wireless connection after the resumption in the first wireless connection, and

wherein the storage is configured to store the first video data and the second video data according to gap synchronization based on one or more timestamps of the first video data and one or more timestamps of the second video data.

8. The system of claim 7 , wherein the streaming media server is configured to receive the second video data by:
responsive to the resumption of the first wireless connection, requesting video blocks indicated by the indication of the video data not received, from the wearable camera.

9. The system of claim 7 , wherein the streaming media server is configured to receive the second video data by:
receiving the second video data without requesting the second video data from the wearable camera.

10. The system of claim 7 further comprising:
the camera, configured to:
detect that the first wireless connection has become unable to support full resolution video playback; and
responsive to the detection, down-convert video data and transmit the down-converted video data to the wireless hub device via the first wireless connection.

11. The system of claim 7 , wherein:
the second video data is transferred from the wearable camera over a third wireless connection, the first wireless connection being more time-sensitive than the third wireless connection.

12. The system of claim 7 , wherein the streaming media server is further configured to:
prior to the resumption in the first wireless connection, transmitting the first video data to the remote client for playback using a keyframe index.

13. The system of claim 12 , wherein the streaming media server is further configured to:
cause playback of video at a fast rate by skipping frames based on the keyframe index.

Assignees

• Axis Ab

Inventors

• Calvert Kerry

Classifications

• H04N21/242 Primary

  Synchronisation processes, e.g. processing of PCR [Programme Clock References] {(arrangements for synchronising broadcast or distribution via plural systems in broadcast distribution systems H04H20/18)} · CPC title

• H04N21/8456

  by decomposing the content in the time domain, e.g. in time segments · CPC title

• H04N21/2187

  Live feed · CPC title

• H04N21/23106

  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 title

• H04N5/765

  Interface circuits between an apparatus for recording and another apparatus · CPC title