1. An apparatus for re-coding an image signal, which conducts re-coding processing using a decoded image signal subjected to coding processing as an input image signal, comprising:
a DCT unit for subjecting the input image signal to a discrete cosine transform (DCT);
a DCT coefficient counter for counting a feature amount on a high or low frequency-region basis using an unquantized DCT coefficient output from said DCT unit;
a picture type detector for detecting a picture type in coding processing in a previous stage, using the feature amount output from said DCT coefficient counter;
a coding control portion for determining coding parameters in re-coding in accordance with detection results of said picture type detector; and
a coding portion for conducting re-coding processing, using the coding parameters determined by said coding control portion.
2. The apparatus for re-coding an image signal according to claim 1, wherein said picture type detector includes, as a picture type to be detected, at least two of three kinds of picture types of an intra frame coding picture, a forward inter-frame predictive coding picture, and a bi-directional inter-frame predictive coding picture.
3. The apparatus for re-coding an image signal according to claim 1, wherein said DCT coefficient counter counts, as a feature amount, a sum of absolute values or a sum of squares on a frequency region basis of DCT coefficients, and
said picture type detector detects a picture type in accordance with variations with time of the sum of absolute values or the sum of squares thus obtained.
4. The apparatus for re-coding an image signal according to claim 3, wherein said picture type detector detects, as an intra frame coding picture, a picture whose sum of absolute values or sum of squares in a high-frequency region is smaller than those of previous and subsequent pictures.
5. The apparatus for re-coding an image signal according to claim 3, wherein said picture type detector detects, as an intra frame coding picture or a forward inter-frame coding picture, a picture whose sum of absolute values or sum of squares in a low-frequency region is larger than those of previous and subsequent pictures.
6. The apparatus for re-coding an image signal according to claim 1, wherein said DCT coefficient counter counts, as a feature amount, the number of DCT coefficients whose absolute values are larger or smaller than previously set threshold values, and
said picture type detector detects a picture type in accordance with the obtained number.
7. The apparatus for re-coding an image signal according to claim 6, wherein said picture type detector detects, as an intra frame coding picture, a picture having a smaller number of DCT coefficients, with respect to other pictures, whose absolute values are larger than threshold values and a picture having a larger number of DCT coefficients, with respect to other pictures, whose absolute values are smaller than threshold values.
8. The apparatus for re-coding an image signal according to claim 1, wherein said coding control portion determines coding parameters using the picture type detected by the picture type detector.
9. The apparatus for re-coding an image signal according to claim 1, wherein said coding control portion determines coding parameters, using an intended coding amount set in accordance with the picture type detected by the picture type detector.
10. A method for recoding a previously encoded image signal using a decoded image signal as input, comprising:
transforming the decoded image signal;
counting features within the transformed decoded image on a high or low frequency-region basis using an unquantized coefficient output provided by the transforming;
detecting a picture type of the encoded image signal associated with the previous encoding based upon the counted features;
determining parameters for re-coding based upon the detecting; and
recoding the decoded image signal based upon the determining.
11. The method according to claim 10, further comprising: detecting at least two of three kinds of picture types of an intra-frame picture, a forward inter-frame predictive coding picture, and a bi-directional inter-frame predictive coding picture.
12. The method according to claim 10, further comprising:
counting one of a sum of absolute values and a sum of squares over a region of transformed image coefficients; and
detecting a picture type in accordance with variations with time of one of the sum of absolute values and a sum of squares.
13. The method according to claim 12, further comprising: detecting an intra-frame coding picture by determining whether one of the sum of absolute values and the sum of squares in a first specified region is smaller than those of previous and subsequent pictures.
14. The method according to claim 12, further comprising: detecting one of an intra-frame coding picture and a forward inter-frame coding picture by determining whether one of the sum of absolute values and the sum of squares in a second region larger than those of previous and subsequent pictures.
15. The method according to claim 10, further comprising:
counting a number of transformed coefficients having absolute values which are one of larger and smaller than previously set threshold values; and
detecting a picture type in accordance with the number.
16. The method according to claim 15, further comprising:
detecting an intra-frame coding picture by determining whether a picture having a smaller number of transform coefficients, with respect to other pictures, having absolute values larger than threshold values and a picture having a larger number of transform coefficients, with respect to other pictures, having absolute values smaller than threshold values.
17. The method according to claim 10, further comprising: determining coding parameters using the picture type.
18. The method according to claim 10, further comprising: determining coding parameters using an intended coding amount set in accordance with the detected picture type.
19. The method according to claim 10, wherein the transforming further comprises a DCT.
20. The method according to claim 12, wherein the transformed image coefficients are DCT coefficients and further wherein the region is a frequency region.
21. The method according to claim 13, wherein the transformed image coefficients are DCT coefficients and further wherein the first specified region is a high-frequency region.
22. The method according to claim 14, wherein the transformed image coefficients are DCT coefficients and further wherein the second specified region is a low-frequency region.
23. The method according to claim 16, wherein the transform coefficients further comprises DCT coefficients.
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. A gripping mechanism comprising:
a frame comprising parallel longitudinal members and cross members;
a connecting device supported by the frame, the connecting device configured to receive a lifting gear;
carriages connected to the longitudinal members, the carriages configured to be adjustable along the longitudinal members, wherein the carriages are adjustable by a drive;
rewinding devices located at the carriages; and
continuous flexible elements configured to receive a product to be transported, wherein ends of the continuous flexible elements are connected to the rewind devices, and wherein the rewinding devices are configured to lengthen or shorten the continuous flexible elements.
2. The gripping mechanism according to claim 1, further comprising motors, wherein a motor is configured to drive a rewinding device.
3. The gripping mechanism according to claim 1, wherein the drive is configured to drive a spindle, and wherein the spindle moves the carriages.
4. The gripping mechanism according to claim 1, further comprising cross bars, wherein the connecting device is located at the cross members.
5. The gripping mechanism according to claim 1, wherein the connecting device comprises a rotating plate configured to be operated by a motor.
6. The gripping mechanism according to claim 1, wherein the connecting device is configured to be tiltable.
7. The gripping mechanism according to claim 1, wherein the carriages (6, 7) are adjustable via a spindle (16, 17), and wherein the carriages are connected to the spindle via a spindle nut.
8. The gripping mechanism according to claim 1, wherein the continuous flexible elements comprise belts, chains, ropes or bands.
9. The gripping mechanism according to claim 1, wherein a surface of the frame is covered with a friction material.
10. A method for lifting a product to be transported applying a gripping mechanism according to claim 1, the method comprising:
positioning the rewind devices on the cross members along the longitudinal members thereby adjusting a spacing of the continuous flexible elements relative to each other,
unwinding the continuous flexible elements;
grasping the product to be transported with the continuous flexible elements;
pressing of the product to be transported on a support surface of the frame by shortening the continuous flexible elements using the rewind devices;
moving the product to be transported; and
unloading the product to be transported.
11. A gripping mechanism comprising:
parallel longitudinal members;
slidable cross members, wherein the slidable cross members are adjustable by a drive;
a traverse holding the parallel longitudinal members and comprising a rotating device, the rotating device configured to receive a lifting gear;
drive shafts connecting the traverse to rewind devices, wherein the rewind devices are arranged in holding devices on the slidable cross members, and wherein the drive shafts are configured to drive the rewind devices; and
continuous flexible elements, wherein a continuous flexible element is connected with its ends to the rewind devices, and wherein the continuous flexible elements are configured to receive a product to be transported.
12. The gripping mechanism according to claim 11, further comprising a spindle configured to adjust the slidable cross members along the longitudinal members.
13. The gripping mechanism according to claim 12, wherein the spindle is engaged in a screw nut and wherein the screw nut is secured to slideable cross members.
14. The gripping mechanism according to claim 11, wherein the parallel longitudinal members are adjustable relative to each other.
15. The gripping mechanism according to claim 11, wherein the slidable cross members are located on opposite sides of the traverse.
16. A gripping mechanism comprising:
parallel longitudinal members;
slidable cross members, wherein the slidable cross members are adjustable by a drive;
a traverse holding the parallel longitudinal members;
drive shafts connecting the traverse to rewind devices, wherein the rewind devices are arranged in holders on the slidable cross members, and wherein the drive shafts are configured to drive the rewind devices; and
continuous flexible elements, wherein a continuous flexible element is connected with its ends to the rewind devices, and wherein the continuous flexible elements are configured to receive a product to be transported.
17. The gripping mechanism according to claim 16, further comprising a spindle, the spindle configured to adjust the slidable cross members along the longitudinal members.
18. The gripping mechanism according to claim 17, wherein the spindle is engaged in a screw nut and wherein the screw nut is secured to slideable cross members.
19. The gripping mechanism according to claim 16, wherein the parallel longitudinal members are adjustable relative to each other.
20. The gripping mechanism according to claim 16, wherein the slidable cross members are located on the same side of the traverse.