Systems and methods to improve timestamp transition resolution
Systems, methods, apparatus, and articles of manufacture to improve timestamp transition resolution of watermarks are disclosed. An example system includes a watermark detector to detect watermarks in media and a decoder to decode timestamps from respective ones of the watermarks. The example system also includes a timestamp transition resolution enhancer to: (a) estimate, based on the timestamps, a coarse transition window between two time periods of the media; (b) map a prior transition window estimate to the estimate of (a); (c) determine a fine transition window estimate based on an overlap between the estimate of (a) and (b); (d) compare the fine transition window estimate of (c) to a threshold; (e) repeat (a) through (d) for successive time periods of the media using the fine transition window estimate of (c) as the prior transition window estimate of (b) until the fine transition window estimate of (c) satisfies the threshold; and (f) set the fine transition window estimate to be an established moment of transition between time periods of the media when the estimate of (c) satisfies the threshold.
1. A system comprising:
a watermark detector to detect watermarks in media;
a decoder to decode timestamps from respective ones of the watermarks; and
a timestamp transition resolution enhancer to:
(a) estimate, based on the timestamps, a coarse transition window between two time periods of the media;
(b) map a prior transition window estimate to the estimate of (a);
(c) determine a fine transition window estimate based on an overlap between the estimate of (a) and (b);
(d) compare the fine transition window estimate of (c) to a threshold;
(e) repeat (a) through (d) for successive time periods of the media using the fine transition window estimate of (c) as the prior transition window estimate of (b) until the fine transition window estimate of (c) satisfies the threshold; and
(f) set the fine transition window estimate to be an established moment of transition between time periods of the media when the estimate of (c) satisfies the threshold.
2. The system of claim 1 , wherein the timestamp transition resolution enhancer is to identify a plurality of moments of transition between the time periods of the media based on the established moment of transition.
3. The system of claim 1 , wherein the time periods correspond to successive minutes of the media and the threshold is about five seconds.
4. The system of claim 1 , wherein the timestamp transition resolution enhancer is to estimate the coarse transition window when a first timestamp from a first watermark is different than a second timestamp from a second watermark.
5. A method comprising:
detecting watermarks in media;
decoding timestamps from respective ones of the watermarks; and
determining, by executing an instruction with a processor, moments of transition between time periods of the media containing the watermarks by:
(a) estimating, based on the timestamps, a coarse transition window between two time periods of the media;
(b) mapping a prior transition window estimate to the estimate of (a);
(c) determining a fine transition window estimate based on an overlap between the estimate of (a) and (b);
(d) comparing the fine transition window estimate of (c) to a threshold;
(e) repeating (a) through (d) for successive time periods of the media using the fine transition window estimate of (c) as the prior transition window estimate of (b) until the fine transition window estimate of (c) satisfies the threshold; and
(f) setting the fine transition window estimate to be an established moment of transition between time periods of the media when the estimate of (c) satisfies the threshold.
6. The method of claim 5 , further including identifying a plurality of moments of transition between the time periods of the media based on the established moment of transition.
7. The method of claim 5 , wherein the time periods correspond to successive minutes of the media and the threshold is about five seconds.
8. The method of claim 5 , wherein the estimating of a coarse transition window between two time periods is based on a first timestamp from a first watermark being different than a second timestamp from a second watermark.
9. A non-transitory computer readable medium machine-readable instructions which, when executed, cause a machine to at least:
detect watermarks in media;
decode timestamps in respective ones of the watermarks; and
determine moments of transition between time periods of media containing the watermarks by:
(a) estimating, based on the timestamps, a coarse transition window between two time periods of the media;
(b) mapping a prior transition window estimate to the estimate of (a);
(c) determining a fine transition window estimate based on an overlap between the estimate of (a) and (b);
(d) comparing the fine transition window estimate of (c) to a threshold;
(e) repeating (a) through (d) for successive time periods of the media using the fine transition window estimate of (c) as the prior transition window estimate of (b) until the fine transition window estimate of (c) satisfies the threshold; and
(f) setting the fine transition window estimate to be an established moment of transition between time periods of the media when the estimate of (c) satisfies the threshold.
10. The computer readable medium of claim 9 , wherein the instructions further cause the machine to identify a plurality of moments of transition between the time periods of the media based on the established moment of transition.
11. The computer readable medium of claim 9 , wherein the time periods correspond to successive minutes of the media and the threshold is about five seconds.
12. The computer readable medium claim 9 , wherein the instructions cause the machine to estimate the coarse transition window between two time periods based on a first timestamp in a first watermark being different than a second timestamp in a second watermark.
13. A system comprising:
means for detecting watermarks in media;
means for decoding timestamps in respective ones of the watermarks;
means for determining moments of transition between time periods of media containing the watermarks by:
(a) estimating, based on the timestamps, a coarse transition window between two time periods of the media;
(b) mapping a prior transition window estimate to the estimate of (a);
(c) determining a fine transition window estimate based on an overlap between the estimate of (a) and (b);
(d) comparing the fine transition window estimate of (c) to a threshold;
(e) repeating (a) through (d) for successive time periods of the media using the fine transition window estimate of (c) as the prior transition window estimate of (b) until the fine transition window estimate of (c) satisfies the threshold; and
(f) setting the fine transition window estimate to be an established moment of transition between time periods of the media when the estimate of (c) satisfies the threshold.
14. The system of claim 13 , wherein the means for determining is to identify a plurality of moments of transition between the time periods of the media based on the established moment of transition.
15. The system of claim 13 , wherein the time periods correspond to successive minutes of the media and the threshold is about five seconds.
16. The system of claim 13 , wherein the means for determining is to estimate the coarse transition window when a first timestamp in a first watermark is different than a second timestamp in a second watermark.