METHOD AND DEVICE FOR DETERMINING THE VALUE OF A DELAY TO BE APPLIED BETWEEN SENDING A FIRST DATASET AND SENDING A SECOND DATASET

• US 20110228166A1
• Filed: 10/24/2008
• Published: 09/22/2011
• Est. Priority Date: 10/26/2007
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Henocq, Xavier, Onno, Patrice, Le Leannec, Fabrice
• Granted Patent: US 8,347,342 B2
• Time in Patent Office: Days
• US Class Current: 348/500
• CPC Class Codes: H04N 19/33 in the spatial domain
• CPC Class Codes: H04N 19/34 Scalability techniques involving progressive bit-plane based encoding of the enhancement layer, e.g. fine granular scalability [FGS]
• CPC Class Codes: H04N 19/70 characterised by syntax aspects related to video coding, e.g. related to compression standards
• CPC Class Codes: H04N 21/2625 for delaying content or additional data distribution, e.g. because of an extended sport event

Abstract

The invention relates to a method and to a device for determining the value of a delay to be applied between sending a first dataset and sending a second dataset, the data being representative of a sequence of coded images, the datasets consisting of data subsets, the coded images being coded according to a first level of resolution and at least a second level of resolution higher than the first level of resolution, the data subsets containing data of a first level of resolution. According to the invention:

• • first and second datasets are obtained (E506); and
  • the value of the delay is determined (E507), the value of the delay being dependent on the number of decoded images that can be formed from the data subsets of the first dataset which contain data of the second or of a second level of resolution.

Claims

1. A method for determining the value of a delay to be applied between sending a first dataset and sending a second dataset, the data being representative of a sequence of coded images, the datasets consisting of data subsets, the coded images being coded according to a first level of resolution and at least a second level of resolution higher than the first level of resolution, the data subsets containing data of a level of resolution, the method comprising:

obtaining the first and second datasets; and

determining the value of the delay, the value of the delay being dependent on the number of decoded images that can be formed from the data subsets of the first dataset which contain data of the second or of a second level of resolution.

2. The method according to claim 1, wherein the value of the delay is dependent on the number of decoded images that can be formed from the data subsets of the first dataset which contain data of the first level of resolution.

3. The method according to claim 2, wherein the value of the delay is furthermore dependent on the maximum rate of reproduction of the decoded images on a display means.

4. The method according to claim 1, wherein the levels of resolution are levels of spatial or quality resolution and in that the value of the delay is dependent on the number of decoded images that can be formed from the data subsets of the first dataset which contain data of the second or of a second level of spatial or quality resolution.

5. The method according to claim 1, wherein the data subsets of each dataset are ordered and in that the value of the delay is a minimum if the first data subset included in the second dataset contributes to the formation of the same decoded image as the first data subset included in the first dataset.

6. The method according to claim 5, wherein it furthermore includes:

detecting each data subset of the first dataset containing data contributing to the formation of an image for which the previous data subsets do not contribute to the formation; and

for each data subset detected, incrementing the value of a counter associated with the level of resolution of the data contained in the subset detected, and wherein the value of the delay is dependent on the number of decoded images that can be formed from the subsets of the first dataset which contain data of the level of resolution of which the associated counter has the maximum value.

7. The method according to claim 1, wherein the sequence of coded images is decomposed into first and second groups of coded images, the first and second datasets containing data representative of the first group of coded images, and in that the method comprises:

obtaining a third set of representative data; and

if the data contained in the third dataset are representative of the first group of images, determining the value of the delay to be applied between sending the second dataset and sending the third dataset or, if the data contained in the third dataset are representative of the second group of images, determining the value of the delay to be applied between sending the first dataset and sending the third dataset.

8. The method according to claim 7, wherein the sequence of coded images is furthermore coded according to a first level of temporal resolution and at least one second level of temporal resolution higher than the first level of temporal resolution and in that, if the data contained in the third dataset are representative of the second group of images, the value of the delay to be applied between sending the first dataset and sending the third dataset is a function of the first level of temporal resolution.

9. The method according to claim 1, wherein the datasets are obtained so as to contain a quantity of data below a predetermined threshold.

10. A device for determining the value of a delay to be applied between sending a first dataset and sending a second dataset, the data being representative of a sequence of coded images, the datasets consisting of data subsets, the coded images being coded according to a first level of resolution and at least a second level of resolution higher than the first level of resolution, the data subsets containing data of a first level of resolution, wherein the device comprises:

obtaining means for obtaining the first and second datasets; and

determining means for determining the value of the delay, the value of the delay being dependent on the number of decoded images that can be formed from the data subsets of the first dataset which contain data of the second or of a second level of resolution.

11. A non-transitory computer-readable information medium storing a program, which, when it is loaded into and executed by a computer or a processor in a device, allows the device to implement the method for determining the value of a delay to be applied between sending a first dataset and sending a second dataset, the data being representative of a sequence of coded images, the datasets consisting of data subsets, the coded images being coded according to a first level of resolution and at least a second level of resolution higher than the first level of resolution, the data subsets containing data of a level of resolution, the method comprising:

obtaining the first and second datasets; and

determining the value of the delay, the value of the delay being dependent on the number of decoded images that can be formed from the data subsets of the first dataset which contain data of the second or of a second level of resolution.

12. A device for determining the value of a delay to be applied between sending a first dataset and sending a second dataset, the data being representative of a sequence of coded images, the datasets consisting of data subsets, the coded images being coded according to a first level of resolution and at least a second level of resolution higher than the first level of resolution, the data subsets containing data of a first level of resolution, wherein the device is configured to:

obtain the first and second datasets; and

determine the value of the delay, the value of the delay being dependent on the number of decoded images that can be formed from the data subsets of the first dataset which contain data of the second or of a second level of resolution.