1. An apparatus, comprising:
an actuator casing having a load apparatus to define an upper pressure chamber and a lower pressure chamber, the upper pressure chamber being opposite the lower pressure chamber;
a yoke to couple the actuator casing and a fluid valve, the yoke defining a body having an internal passageway to fluidly couple a control fluid to at least one of the upper pressure chamber or the lower pressure chamber;
a fluid connector assembly positioned in the actuator casing to fluidly couple the internal passageway to at least one of the upper pressure chamber or the lower pressure chamber, the load apparatus being positioned between the internal passageway of the yoke and the upper pressure chamber; and
a positioner mountable to the yoke, wherein the positioner is to supply the control fluid to the internal passageway, and wherein an outlet of the positioner is coupled to an inlet of the internal passageway when the positioner is mounted to the yoke.
2. The apparatus of claim 1, wherein the load apparatus comprises a piston or a diaphragm.
3. The apparatus of claim 1, wherein the upper pressure chamber is in communication with a first side of the load apparatus and the lower pressure chamber is in communication with a second side of the load apparatus, the first side being opposite the second side.
4. The apparatus of claim 3, further comprising a spring disposed in the upper pressure chamber to bias the load apparatus to a predetermined position when the control fluid applies a force to the second side of the load apparatus that is less than a force applied to first side of the load apparatus.
5. The apparatus of claim 3, further comprising a spring disposed in the lower pressure chamber to bias the load apparatus to a predetermined position when the control fluid applies a force to the first side of the load apparatus that is less than a force applied to the second side of the load apparatus.
6. An apparatus, comprising:
an actuator casing having a load apparatus to define an upper pressure chamber and a lower pressure chamber, the upper pressure chamber being opposite the lower pressure chamber;
a yoke to couple the actuator casing and a fluid valve, the yoke defining a body having an internal passageway to fluidly couple a control fluid to at least one of the upper pressure chamber or the lower pressure chamber;
a fluid connector assembly positioned in the actuator casing to fluidly couple the internal passageway to at least one of the upper pressure chamber or the lower pressure chamber, the load apparatus being positioned between the internal passageway of the yoke and the upper pressure chamber, wherein the fluid connector assembly includes a first fluid passageway disposed in the actuator casing to fluidly couple a first outlet of the internal passageway and the upper pressure chamber, and wherein the fluid connector assembly includes a coupling to couple the first fluid passageway to the load apparatus.
7. The apparatus of claim 6, wherein the load apparatus comprises an opening to fluidly couple the first fluid passageway and the upper pressure chamber.
8. The apparatus of claim 6, wherein the first fluid passageway comprises tubing.
9. An apparatus, comprising:
an actuator casing having a load apparatus to define an upper pressure chamber and a lower pressure chamber, the upper pressure chamber being opposite the lower pressure chamber;
a yoke to couple the actuator casing and a fluid valve, the yoke defining a body having an internal passageway to fluidly couple a control fluid to at least one of the upper pressure chamber or the lower pressure chamber, wherein the internal passageway includes:
a first fluid path to fluidly couple to the upper pressure chamber of the actuator, the first fluid path formed in the yoke between a first end of the yoke and a second end of the yoke, the first fluid path having a first outlet positioned adjacent the first end of the yoke and a first inlet positioned between the first end and the second end; and
a second fluid path to fluidly couple to the lower pressure chamber of the actuator, the second fluid path formed in the yoke between the first end and the second end, the second fluid path having a second outlet positioned adjacent the first end of the yoke and a second inlet positioned between the first end and the second end; and
a fluid connector assembly positioned in the actuator casing to fluidly couple the internal passageway to at least one of the upper pressure chamber or the lower pressure chamber, the load apparatus being positioned between the internal passageway of the yoke and the upper pressure chamber.
10. The apparatus of claim 9, wherein the yoke has a U-shaped frame that defines a first leg and a second leg, and wherein the first fluid path is formed in the first leg of the U-shaped frame and the second fluid path is formed in the first leg of the U-shaped frame adjacent the first fluid path, the first fluid path being fluidly isolated from the second fluid path.
11. An apparatus, comprising:
an actuator casing having a load apparatus to define an upper pressure chamber and a lower pressure chamber, the upper pressure chamber being opposite the lower pressure chamber;
a yoke to couple the actuator casing and a fluid valve, the yoke defining a body having an internal passageway to fluidly couple a control fluid to at least one of the upper pressure chamber or the lower pressure chamber; and
a fluid connector assembly positioned in the actuator casing to fluidly couple the internal passageway to at least one of the upper pressure chamber or the lower pressure chamber, the load apparatus being positioned between the internal passageway of the yoke and the upper pressure chamber, wherein the fluid connector assembly is at least partially positioned in the lower pressure chamber when the internal passageway is coupled to the upper pressure chamber.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An electronic device, comprising:
a front-end stream buffer for buffering a plurality of video data units of a video stream, the video stream comprising a plurality of subordinate video streams interleaved therein;
a plurality of back-end video buffers, each being configured to buffer video information contained in one of the subordinate video streams; and
a de-multiplexer, coupled to the front-end stream buffer and the back-end video buffers, configured to:
fetch the video information of the video data units buffered in the front-end stream buffer and pass the fetched video information to the back-end video buffers; and
skip accessing a first video data unit buffered in the front-end stream buffer and instead fetch video information of a second video data unit buffered in the front-end stream buffer; wherein, while the first video data unit being skipped, the first video data unit is still buffered in the front-end stream buffer for further processing.
2. The electronic device of claim 1, wherein the de-multiplexer is further configured to:
determine whether it is blocked from fetching the video information of the first video data unit; and
skip accessing the first video data unit and instead fetch the video information of the second video data unit when being blocked from fetching the video information of the first video data unit.
3. The electronic device of claim 2, wherein the de-multiplexer is further configured to:
determine whether it is blocked from fetching the video information of the first video data unit by checking whether a corresponding one of the back-end video buffers has sufficient space remaining for buffering the video information of first video data unit.
4. The electronic device of claim 2, wherein the first video data unit and the second video data unit belong to two different ones of the subordinate video streams.
5. The electronic device of claim 2, wherein the second video data unit is an oldest one of its kind buffered in the front-end stream buffer.
6. The electronic device of claim 1, wherein one of the subordinate video streams corresponds to a main view of the video stream while another of the subordinate video streams corresponds to a sub-view of the video stream.
7. The electronic device of claim 1, wherein the video stream is a stereoscopic interleaved file (ssif) stream.
8. A method performed by a de-multiplexer that is coupled to a front-end stream buffer and a plurality of back-end video buffers, wherein the front-end stream buffer is configured to buffer a plurality of video data units of a video stream, the video stream comprises a plurality of subordinate video streams interleaved therein, and each of the back-end video buffers is configured to buffer video information contained in one of the subordinate video streams, the method comprising:
determining whether the de-multiplexer is blocked from fetching video information of a first video data unit buffered in the front-end stream buffer; and
skipping accessing the first video data unit and instead fetch the video information of a second video data unit when the de-multiplexer is being blocked from fetching the video information of the first video data unit;
wherein, while the first video data unit being skipped, the first video data unit is still buffered in the front-end stream buffer for further processing.
9. The method of claim 8, wherein the step of determining whether the de-multiplexer is blocked from fetching the video information of the first video data unit comprises:
determining whether the de-multiplexer is blocked from fetching the video information of the first video data unit by checking whether a corresponding one of the back-end video buffers has sufficient space remaining for buffering the video information of the first video data unit.
10. The method of claim 8, wherein the first video data unit and the second video data unit belong to two different ones of the subordinate video streams.
11. The method of claim 8, wherein the second video data unit is an oldest one of its kind buffered in the front-end stream buffer.
12. The method of claim 8, wherein one of the subordinate video streams corresponds to a main view of the video stream while another of the subordinate video streams corresponds to a sub-view of the video stream.
13. The method of claim 8, wherein the video stream is a stereoscopic interleaved file (ssif) stream.