Martin L Richards

US Patent:

7400653, Jul 15, 2008

Filed:

Jun 18, 2004

Appl. No.:

10/871363

Inventors:

Trevor Davies - Walnut Creek CA, US
John David Couling - Wootton Bassett, GB
Gopi Lakshminarayanan - Fremont CA, US
Martin John Richards - Redwood City CA, US

Assignee:

Dolby Laboratories Licensing Corporation - San Francisco CA

International Classification:

H04J 3/06

US Classification:

370493, 370503, 370536, 386 98

Abstract:

A playback system in a digital cinema network synchronizes the presentation of visual and aural content by deriving timing information for packets of information that are conveyed in video and audio data streams, examining the timing information to determine if any misalignment between the two data streams is likely to be perceptible and, if the misalignment is deemed to be perceptible, introducing delays into one or both data streams to correct the misalignment. If the audio data stream precedes the video data stream, the audio data stream is delayed by an integer number of audio sample periods. If the video data stream precedes the audio data stream, the video data stream is delayed by an integer number of video frames and the audio data stream is delayed by an integer number of audio sample periods.

US Patent:

7448061, Nov 4, 2008

Filed:

Jun 21, 2004

Appl. No.:

10/873407

Inventors:

Martin John Richards - Redwood City CA, US
Douglas Evan Mandell - San Francisco CA, US
Makarand Prabhakar Karanjkar - Fremont CA, US
Pierre-Anthony Stivell Lemieux - San Mateo CA, US

Assignee:

Dolby Laboratories Licensing Corporation - San Francisco CA

International Classification:

H04N 7/18

US Classification:

725 82, 725116, 725114, 709204, 370503

Abstract:

In a digital cinema network of NTP-timekeeping devices in which one of the devices decodes video information, the scheduling of future instructions takes into account the differences between the nominal and actual frame rates of the video decoding device and the network's NTP latency.

US Patent:

7784938, Aug 31, 2010

Filed:

May 9, 2007

Appl. No.:

11/801574

Inventors:

Martin John Richards - Redwood City CA, US
Wilson Heaton Allen - Mill Valley CA, US

Assignee:

Dolby Laboratories Licensing Corporation - San Francisco CA

International Classification:

G02B 27/22
G02C 7/10

US Classification:

351163, 359464

Abstract:

Shaped glasses have curved surface lenses and spectrally complementary filters disposed on the curved surface lenses configured to compensate for wavelength shifts occurring due to viewing angles and other sources. The spectrally complementary filters include guard bands to prevent crosstalk between spectrally complementary portions of a 3D image viewed through the shaped glasses. In one embodiment, the spectrally complementary filters are disposed on the curved lenses with increasing layer thickness towards edges of the lenses. The projected complementary images may also be pre-shifted to compensate for subsequent wavelength shifts occurring while viewing the images.

US Patent:

D639332, Jun 7, 2011

Filed:

Nov 3, 2010

Appl. No.:

29/378357

Inventors:

Brad Basler - San Mateo CA, US
Thao Hovanky - San Francisco CA, US
Martin Richards - Redwood City CA, US
Andrew Healy - San Francisco CA, US
Del Hatch - San Francisco CA, US

Assignee:

Dolby Laboratories Licensing Corporation - San Francisco CA

International Classification:

1606

US Classification:

D16309, D16300, D16326

US Patent:

7959295, Jun 14, 2011

Filed:

May 18, 2007

Appl. No.:

11/804602

Inventors:

Martin John Richards - Redwood City CA, US
Gary D. Gomes - Fremont CA, US

Assignee:

Dolby Laboratories Licensing Corporation - San Francisco CA

International Classification:

G03B 21/14
G02B 27/22
G02B 13/00

US Classification:

353 7, 353 84, 359464

Abstract:

Spectral separation filters for channels of a 3D image projection incorporate passbands of primary colors. In at least one of the filters, passbands are present in more than 3 primary colors. A set of two filters include a first filter having passbands of low blue, high blue, low green, high green, and red, and a second filter having passbands of blue, green, and red. The additional primary passbands of the first filter allow for an increased color space in projections through the filters compared to filters only having red, green, and blue primaries. The added flexibility of the increased color space is utilized to more closely match a color space and white point of a projector in which the filters are used.

US Patent:

8403489, Mar 26, 2013

Filed:

May 3, 2011

Appl. No.:

13/100051

Inventors:

Martin Richards - Redwood City CA, US
Gary D. Gomes - Union City CA, US

Assignee:

Dolby Laboratories Licensing Corporation - San Francisco CA

International Classification:

G02B 27/22
G03B 21/00

US Classification:

353 7, 35115965, 359464, 348 60

Abstract:

Spectral separation filters for channels of a 3D image projection incorporate passbands of primary colors. In at least one of the filters, passbands are present in more than 3 primary colors. A set of two filters include a first filter having passbands of low blue, high blue, low green, high green, and red, and a second filter having passbands of blue, green, and red. The additional primary passbands of the first filter allow for an increased color space in projections through the filters compared to filters only having red, green, and blue primaries. The added flexibility of the increased color space is utilized to more closely match a color space and white point of a projector in which the filters are used.

US Patent:

8459796, Jun 11, 2013

Filed:

Nov 23, 2009

Appl. No.:

12/624402

Inventors:

Martin Richards - Redwood City CA, US
Allen Wilson - Mill Valley CA, US

Assignee:

Dolby Laboratories Licensing Corporation - San Francisco CA

International Classification:

G03B 21/14
G02B 27/22
G02B 13/00

US Classification:

353 7, 353 84, 359464, 35115965

Abstract:

Shaped glasses have curved surface lenses and spectrally complementary filters disposed on the curved surface lenses configured to compensate for wavelength shifts occurring due to viewing angles and other sources. The spectrally complementary filters include guard bands to prevent crosstalk between spectrally complementary portions of a 3D image viewed through the shaped glasses. In one embodiment, the spectrally complementary filters are disposed on the curved lenses with increasing layer thickness towards edges of the lenses. The projected complementary images may also be pre-shifted to compensate for subsequent wavelength shifts occurring while viewing the images.

US Patent:

8480234, Jul 9, 2013

Filed:

Aug 8, 2012

Appl. No.:

13/569374

Inventors:

Martin Richards - Redwood City CA, US

Assignee:

Dolby Laboratories Licensing Corporation - San Francisco CA

International Classification:

G02B 27/22
G02B 5/22
G03B 21/28
H04N 15/00
H04N 13/04

US Classification:

353 7, 353 84, 348 60, 359891

Abstract:

A filter wheel having spirally shaped left and right channel 3D filters. The 3D filters are, for example, spectral separation filters. The filter is mounted, for example, close to an integrating rod output of a projector. The left and right channel filtered light scrolls across a modulation device which is energized with correspondingly scrolling left and right image data. In one embodiment, the integrating rod comprises mirrored surfaces to facilitate recycling of light reflected off the filter wheel. The filter wheel may be placed in a single or dual projector configuration. In one embodiment, the filters are fixed at the end of an integrating rod using “re-cycled” light to illuminate different channels of a projection system.