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A digital circuit for compressing video data generated by a missile's seeker. The digital circuit includes a frame controller and a video compression engine. The frame controller generates each frame of data with each frame of data having eight subframes of one thousand eight bit words. The compression engine receives approximately sixty four scans of video data with each scan having 4000 samples of video data. The compression engine receives the first scan of video data from the missile's seeker and then writes the scan of video data to an external memo...
A digital circuit for compressing video data generated by a missile's seeker. The digital circuit includes a frame controller and a video compression engine. The frame controller generates each frame of data with each frame of data having eight subframes of one thousand eight bit words. The compression engine receives approximately sixty four scans of video data with each scan having 4000 samples of video data. The compression engine receives the first scan of video data from the missile's seeker and then writes the scan of video data to an external memory which is a static RAM. The compression engine adds each successive scan of video data to the previous scans to provide a total scan value for each sample of video data. The compression engine obtains an average value for each sample of video data by performing a binary shift. The compression engine also provides a peak value for each of the 4000 samples of video data. The frame controller then generates the eight subframes of video data with alternating bytes comprising peak video data and average video data. The frame controller also provides three bytes of frame sync, one byte of sub-frame identification and one byte representing frame count. One byte representing scan count for each subframe is generated by the compression engine. f said active layer, and the quantum well layer and the barrier layers constituting said active layer are made mixed-crystals by the diffused impurity and vacancies due to the impurity. 2. A semiconductor laser as set forth in claim 1, wherein, in the regions near the pair of facing end faces of said active layer, the quantum well layer and the barrier layers constituting said active layer are made mixed-crystals. f multiplexing data, wherein a plurality of picture elements made of digital data undergo at least one of overlaying and mixing to complete a picture, and the digital data of each picture element is multiplexed, said method comprising the steps of: (a) multiplexing digital data "p1" and digital data "d1" to produce a first object data "o1"; (b) packetizing the object data "o1" into a packet to produce a first packet data "op1"; (c) packetizing digital data "p2" into a packet to produce a second packet data "op2"; and (d) further multiplexing the first packet data "op1" and the second packet data "op2" to produce a third packet data "op3", wherein a packet number identifying the packet is assigned to the first packet data "op1" and the second packet data "op2" respectively. 7. A method of multiplexing data, wherein a plurality of picture elements made of digital data undergo at least one of overlaying and mixing to complete a picture, and the digital data of each picture element is multiplexed, said method comprising the steps of: (a) multiplexing digital data "p1" and digital data "d1" to produce a first object data "o1"; (b) packetizing the object data "o1" into a packet to produce a first packet data "op1"; (c) multiplexing digital data "p2" and digital data "d2" to produce a second object data "o2"; (d) packetizing the second object data "o2" into a packet to produce a second packet data "op2"; and (e) further multiplexing the first packet data "op1" and the second packet data "op2" to produce a third packet data "op3", wherein a packet number identifying the packet is assigned to the first packet data "op1" and the second packet data "op2" respectively. 8. A method of multiplexing data, wherein a plurality of picture elements made of digital data undergo at least one of overlaying and mixing to complete a picture, and the digital data of each picture element is multiplexed, said method comprising the steps of: (a) multiplexing digital data "p1" and digital data "d1" to produce a first object data "o1"; (b) packetizing the object data "o1" into a packet to produce a first packet data "op1"; (c) multiplexing digital data "p2" and digital data "d2" to produce a second object data "o2"; (d) packetizing the second object data "o2" into a packet to produce a second packet data "op2"; and (e) further multiplexing the first packet data "op1" and the second packet data "op2" to produce a third packet data "op3", wherein a first packet number is assigned to the third packet data "op3", and different packet numbers, i.e., a second and a third packet numbers different from the first packet number are assigned to the packet data "op1" and "op2". 9. A method of multiplexing data, wherein a plurality of picture elements made of digital data undergo at least one of overlaying and mixing to complete a picture, and the digital data of each picture element is multiplexed, said method comprising the steps of: (a) multiplexing digital data "p1" and digital data "d1" to produce a first object data "o1"; (b) packetizing the first object data "op1" into a packet to produce a first packet data "op1"; (c) multiplexing a first table packet that indicates details and a packet number of the first packet data "op1" onto the first packet data "op1"; (d) multiplexing digital data "p2" and digital data "d2" to produce a second object data "o2"; (e) packetizing the second object data "o2" into a packet to produce a second packet data "op2"; (f) multiplexing a second table packet that indicates details and a packet number of the second packet data "op2" onto the second packet data "op2"; and (g) further multiplexing the first packet data "op1" and the second packet data "op2" to produce a third packet data "op3"; wherein the third packet data "op3" is further multiplexed with a third table packet that indicates details and a packet number of the third packet data "op3", and packet numbers of the first and second table packets are described in the third table packet. 10. A method of multiplexing data, wherein a plurality of picture elements made of digital data undergo at least one of overlaying and mixing to complete a picture, and the digital data of each picture element is multiplexed, said method comprising the steps of: (a) multiplexing digital data "p1" and digital data "d1" to produce a first object data "o1"; (b) identifying digital data "p2" as a second object data "o2"; and (c) further multiplexing the first object data "o1" and the second object data "o2" to form a third object data "o3"; wherein the first object data "o1" is multiplexed data including first time information necessary for synchronized reproduction of the digital data "p1" and the digital data "d1", and wherein the third object data "d3" to be multiplexed includes second time information necessary for synchronized reproduction of the third object data "d3". 11. A method of multiplexing data, wherein a plurality of picture elements made of digital data undergo at least one of overlaying and mixing to complete a picture, and the digital data of each picture element is multiplexed, said method comprising the steps of: (a) multiplexing digital data "p1" and digital data "d1" to produce a first object data "o1"; (b) packetizing the object data "o1" into a packet to produce a first packet data "op1"; (c) identifying a digital data "p2" as a second object data "o2"; (d) packetizing the second object data "o2" into a packet to produce a second packet data "op2"; (e) further multiplexing the first packet data "op1" and the second packet data "op2" to produce a third packet data "op3"; and (f) assigning different priority orders to the first, second and third packet data "op1", "op2" and "op3" respectively. 12. A method of multiplexing data, wherein a plurality of picture elements made of digital data undergo at least one of overlaying and mixing to complete a picture, and the digital data of each picture element is multiplexed, said method comprising the steps of: (a) multiplexing first digital data "p1" and second digital data "d1" to produce a first object data "o1"; (b) making a third digital data "p2" as a second object data "o2"; and (c) further multiplexing the first object data "o1" and the second object data "o2" to produce a third object data "o3" and wherein the third object data "o3" is multiplexed by scenario data having both reproduction time and reproduction location of one of the object data "o1", "o2" and "o3". 13. The method of multiplexing data of claim 12, wherein the multiplexed data is reproduced based on the scenario data describing the reproduction time and location. 14. A method of multiplexing data, wherein a picture is treated as an aggregate of a plurality of objects, and the picture data are processed on an object-oriented basis, then the processed data is multiplexed, and wherein a plurality of picture elements made of digital data undergo at least one of overlaying and mixing to complete a picture, and the digital data of each picture element is multiplexed, said method comprising the steps of: (a) dividing the picture into a plurality of master objects, and identifying themselves as the master objects; (b) dividing the identified master object into smaller slave objects when necessary, and identifying themselves as the slave objects, whereby a hierarchy is formed; (c) packetizing one of the identified master object, the identified master and slave objects, and the identified slave object into a packet, then assigning a packet number to the packet, and (d) adding the hierarchical details as hierarchical information to the multiplexed data. 15. The method of multiplexing data as defined in claim 14, wherein said object is identified independently by designating at least one of a picture background, a moving body and elements of the moving body. 16. The method of multiplexing data as defined in claim 14, wherein said object is identified by designating a target object. 17. The method of multiplexing data as defined in claim 14, wherein said object is identified independently by designating at least one of picture data, audio data and additional information. 18. The method of multiplexing data as defined in claim 14, wherein said hierarchy comprising: an upper class comprising a parent body in the object; and a lower class comprising a child body that is an element of the parent body. 19. A reproducing method of data multiplexed through the method described in claim 14, said reproducing method comprising the steps of: (a) separating the multiplexed data into hierarchical classes based on hierarchical information when the hierarchical information is attached to the multiplexed data; (b) picking out a packet number of a slave object, which is multiplexed on the multiplexed data, respectively from the class; (c) picking out a packet number of a master object, which is multiplexed on the multiplexed data, respectively from the class; and (d) reproducing the multiplexed data based on the packet numbers picked out through the above processes as defined in (b) and (c). 20. A multiplexed data reproducing apparatus that reproduces the data multiplexed through the method described in claim 14, said reproducing apparatus comprising: (a) hierarchy separating means for separating the multiplexed data into hierarchical classes based on hierarchical information when the multiplexed data is attached with the hierarchical information; (b) first picking out means for picking out a packet number of a slave object, which is multiplexed on the multiplexed data, respectively from the class; (c) second picking out means for picking out a packet number of a master object, which is multiplexed on the multiplexed data, respectively from the class; and (d) data reproducing means for reproducing the multiplexed data based on the packet numbers picked out through the above means as defined in (b) and (c). 21. A reproducing method of data multiplexed through the method as described in claim 1, wherein time data telling when a reproduction starts and location data telling where the reproduction is located are in the multiplexed data, and the multiplexed data is reproduced based on said time data and location data. 22. A reproducing method of data multiplexed through a method of multiplexing data, wherein a plurality of picture elements made of digital data undergo at least one of overlaying and mixing to complete a picture, and the digital data of each picture element is multiplexed, said multiplexing method comprising the steps of: (a) multiplexing first digital data "p1" and second digital data "d1" to produce a first object data "o1"; (b) making a third digital data "p2" as a second object data "o2"; and (c) further multiplexing the first object data "o1" and the second object data "o2" to produce a third object data "o3", wherein the multiplexed data is reproduced based on one of time information among a plurality of time information having different time bases. 23. A reproducing method of data multiplexed through the method as described in claim 4, wherein information related to relationships between objects is picked out from object data "o3", and one of object data "o1", "o2" and "o3" is selected before being reproduced. 24. A data reproducing apparatus that reproduces data multiplexed according to a data multiplexing method wherein a plurality of picture elements made of digital data undergo at least one of overlaying and mixing to complete a picture, and the digital data of each picture element is multiplexed, said multiplexing method comprising the steps of: (a) multiplexing first digital data "p1" and second digital data "d1" to produce a first object data "o1"; (b) making a third digital data "p2" as a second object data "o2"; and (c) further multiplexing the first object data "o1" and the second object data "o2" to produce a third object data "o3", wherein one of a picture, audio and data predetermined by the reproducing apparatus replaces a corresponding picture, audio and data when one of these is unable to be reproduced. 25. A data reproducing apparatus that decodes data multiplexed as described in claim 1, wherein one of a picture object, an audio object and a data object each of which is owned by a decoder interpolates, completes and replaces one of a picture object, an audio object, and a data object when one of these objects are unable to be reproduced, and for reproduction. 26. A recording medium on which multiplexed data are recorded, the data being multiplexed according to a method of multiplexing digital data to a bitstream, the digital data including at least one of audio and picture data, said method comprising the steps of: (a) multiplexing first digital data "p1" and second digital data "d1" to produce a first object data "o1"; (b) making a third digital data "p2" as a second object data "o2"; and (c) further multiplexing the first object data "o1" and the second object data "o2" to produce a third object data "o3". 27. The method of multiplexing data as described in claim 1, and further comprising the step of multiplexing audio data.
