System for fast angle changing in video playback devices
View Patent ↗Embodiments of the present invention provide faster user-selected scene switching during playback of a video production. In one embodiment, several channels of video (e.g., several video streams each depicting a different camera angle) are read from interleaved data on a DVD disc. Each channel's data is maintained in a channel buffer that is input to a video decoder via a selector. When a signal from a user input device indicates that a user has selected a new channel, the selector can immediately provide the selected channel's data from the channel buffer to the video decoder, thus providing an increase in switching speed.
1. A method for providing scene switching in a video playback device, wherein the video playback device includes one or more buffers coupled to a decoder via a selector, the method comprising:
during playback of a video production on a storage medium being read by the video playback device, obtaining two or more encoded video streams that were stored on the storage medium being read by the video playback device, the two or more video streams including different angles for the video production, wherein the two or more video streams include different angle identifiers that are used to identify which angle is associated with respective streams in the two or more video streams;
storing the two or more encoded video streams into the one or more buffers using corresponding angle identifiers, wherein one of the two or more encoded video streams for a first angle is being decoded and output by the video playback device for display;
accepting a signal from an input device to select a second angle for a second one of the two or more video streams;
using the selector to direct the second of the two or more video streams for the second angle to the decoder; and
increasing a data transfer rate between a track buffer and a demultiplexer in response to a new angle request.
2. The method of claim 1 , wherein the data transfer rate is increased to a rate greater than n×r, where n is the number of angles and r is the data rate of a single angle's bitstream.
3. A non-transitory computer-readable medium having computer-executable instructions stored thereon that, when executed by a computing device,
cause the computing device to perform a method comprising:
reading from a storage medium a plurality of video streams including angle video data for a plurality of angles for a video production, wherein the plurality of video streams include different angle identifiers that are used to identify which angle is associated with a corresponding stream in the plurality of video streams;
storing the plurality of video streams into a buffer using corresponding angle identifiers,
reading from the buffer, decoding and outputting for display a first of the plurality of video streams for a first angle;
accepting a signal from an input device to select a second angle;
reading from the buffer, decoding and outputting for display a second of the plurality of video streams corresponding to the second angle; and
increasing a data transfer rate between a track buffer and a demultiplexer in response to a new angle request.
4. The tangible computer-readable medium of claim 3 , wherein the data transfer rate is increased to a rate greater than n×r, where n is the number of angles and r is the data rate of a single angle's bitstream.