Abstract: A recording/reproducing apparatus for recording encoded data on a recording medium by time sequentially and independently recording normal reproduction data and specific reproduction data contained in the encoded data, the normal reproduction data and specific reproduction data including decode control information. The recording/reproducing apparatus includes a detection circuit for detecting the decode control information from reproduced data in a specific reproduction mode and in a normal reproduction mode, and a memory circuit for storing the control information detected by the detection circuit.

Abstract: An image reproducing apparatus includes a reproduction unit to reproduce an image signal corresponding to a picture having a plurality of image blocks that each include a plurality of pixels. The image signal includes coded image data for each of the image blocks. A decoding nit is provided to decode the image signal reproduced by the reproduction unit. In addition, a replacement unit is provided to replace with a predetermined signal, a portion of the image data for blocks located near an undecodable block, the undecodable block being a block corresponding to image data that cannot be decoded by the decoding unit.

Abstract: An optical apparatus comprises a zoom lens for effecting magnification change, a focusing lens for effecting focus adjustment, a first motor for moving the focusing lens, a second motor for moving the zoom lens, and detecting mechanism for detecting the reference positions of the focusing lens and the zoom lens, the detecting mechanism being used in common to the two lenses.

Abstract: An automatic focus adjusting device in a camera system includes a focus detecting circuit for a focusing state of an object image formed on an image plane by a photographic lens, a control circuit for producing a control signal on the basis of an output of the focus detecting circuit and for outputting the control signal to the photographic lens to control the same, and a characteristic detecting circuit for detecting a predetermined optical characteristic of the photographic lens. The control circuit is arranged to transmit the control signal to the photographic lens by defining as a parameter a change of the optical characteristic detected by the characteristic detecting circuit.

Abstract: An optical equipment comprises: a first lens for focusing and compensation for magnification variation; a second lens for magnification variation; position detection means for detecting positions of the first lens and the second lens; focus detection means for detecting a focus status; lens drive means for driving the first lens and the second lens; and control means for controlling the lens drive means in accordance with information from the position detection means and the focus detection means. The control means determines a drive range of the first lens in which a circle of confusion may be zero, in accordance with focal length information, and inhibits the first lens from being driven out of the range during the magnification variation of the second lens.