Abstract:
Encoded data is reversely reproduced by decoding each picture only once and using only as many frame memory sections as are needed in a normal playback operation. A picture header detector (34) detects a picture header from data read out from a video code buffer (10) to identify the type of picture. The picture type information controls a picture data selecting circuit (35) for selecting frames of I and P pictures equal in number to the number of frame memory sections in a frame memory bank (16). The selected frames are supplied to an inverse VLC circuit (11) to be decoded, starting at the head of a GOP with an I picture. The decoded I and P pictures are stored in the frame memory bank (16) and transmitted to a display unit (18), starting with the temporally most recent picture and reading backward.
Abstract:
High-speed access to a multi-layered disk is to be realized. Each layer on a multi-layered disk includes an inside guard area 2, program area 3, and outer guard area 5 which are located in uniform radial positions in all layers. The uppermost layer has the recording direction from the inner side to the outer side of the disk, and the next layer has the recording direction from the outer side to the inner side of the disk such that opposite recording directions appear alternately. The radial position of the recording terminal end on the uppermost first layer coincides with the radial position of the start of record on the next second layer.
Abstract:
A tape cassette includes a plurality of projections (23) on a slide surface of a cassette case (1), on which slide surface a reel lock member (11) can slide. The reel lock member (11) can slide on the projections (23) in contact relationship therewith so that smooth sliding movement of the reel lock member (11) is not prevented by a burr generated at the periphery of a hole (21) formed through the slide surface or a burr-like projection generated at the periphery of a contact position (24) formed by engagement of an ejector pin with the slide surface during moulding of the cassette case.
Abstract:
A data recording medium having a plurality of recording regions. The recording medium has a first recording region (2), a second recording region (4) for recording data having address data different from the address data added to the data recorded in the first recording region, and identification data recorded in the second recording region to identify the first recording region and the second recording region.
Abstract:
A recording method for an optical disc which records data for identifying an optical disc on the optical disc wherein the identifying data is recorded by irradiating an optical disc having a substrate made of a synthetic resin with an uneven pattern on one face and a reflection film made of a metal material so provided as to cover the uneven pattern of the substrate with an optical beam to cause the previously formed uneven pattern to change physically.
Abstract:
Encoded data is reversely reproduced by decoding each picture only once and using only as many frame memory sections as are needed in a normal playback operation. A picture header detector detects a picture header from data read out from a video code buffer to identify the type of picture. The picture type information controls a picture data selecting circuit for selecting frames of I and P pictures equal in number to the number of frame memory sections in a frame memory bank. The selected frames are supplied to an inverse VLC circuit to be decoded, starting at the head of a GOP with an I picture. The decoded I and P pictures are stored in the frame memory bank and transmitted to a display unit, starting with the temporally most recent picture and reading backward.
Abstract:
ENCODED DATA IS REVERSELY REPRODUCED BY DECODING EACH PICTURE ONLY ONCE AND USING ONLY AS MANY FRAME MEMORY SECTIONS(16A-19C) AS ARE NEEDED IN A NORMAL PLAYBACK OPERATION. A PICTURE HEADER DETECTOR DETECTS A PICTURE HEADER FROM DATA READ OUT FROM A VIDEO CODE BUFFER TO IDENTIFY TYPE OF PICTURE. THE PICTURE TYPE INFORMATION CONTROLS A PICTURE DATA SELECTING CIRCUIT FOR SELECTING FRAMES OF 1 AND P PICTURES EQUAL IN NUMBER TO THE NEMBER OF FRAME MEMORY SECTIONS IN A FRAME MEMORY BANK(16). THE SELECTED FRAMES ARE SUPPLIED TO AN INVERSE VLC CIRCUIT TO BE DECODED, STARTING AT THE HEAD OF A GOP WITH AN I PICTURE. THE DECODED I AND P PICTURES ARE STORED IN THE FRAME MEMORY BANK(16) AND TRANSMITTED TO A DISPLAY UNIT, STARTING WITH THE TEMPORALLY MOST RECENT PICTURE AND READING BACKWARD.(FIG 1)