摘要:
In a digital-watermark superposing apparatus and a digital-watermark detecting apparatus, a plurality of DCT coefficients for respective frequency components are generated by subjecting video data to a two-dimensional DCT transform for each pixel block consisting of a predetermined number of pixels, and the value of at least one of the DCT coefficients is quantized in accordance with a quantization rule corresponding to the information so as to obtain a quantized DCT coefficient. A two-dimensional inverse DCT transform is performed with respect to the DCT coefficients in which the at least one DCT coefficient thereof is replaced with the quantized DCT coefficient, so as to obtain digital-watermark superposed video data in which the digital watermark corresponding to the information has been superposed on the video data. At this juncture, the digital-watermark superposed video data is selected and outputted concerning a section in which a video pattern due to the video data is not flatter than a predetermined video pattern, while, instead of the digital-watermark superposed video data, the video data is selected and outputted as it is concerning a section in which the video pattern due to the video data is flatter than the predetermined video pattern.
摘要:
The record information (42, 43, 44) and the access information (51: DSI) are recorded on a record track (1a) of an information record medium (1: DVD) such that the record information and the access information are divided into a plurality of first data groups (30: VOBU), each of which is a unit able to be accessed by an information reproducing apparatus (S2) and each of which comprises the record information and the access information, and are divided into a plurality of second data groups (20: CELL), each of which is a unit able to be logically divided in the reproduction and each of which comprises a series of the first data groups arranged along the record track among the first data groups. Management information (PGCI) are collectively recorded at one portion of the record track, and comprises: a plurality of time unit address informations (200) each indicating an address of respective one of the first data groups to which the record information in every predetermined time unit belongs; and discontinuity information (201) indicating whether or not two addresses, which are indicated to be apart from each other by one time unit by the time unit address informations, belong to a same one of the second data groups.
摘要:
An information recording medium includes: a plurality of recorded information pieces being independent of each other; a plurality of individual attribute information pieces each corresponding to each of the recorded information piece and including information relating to attributes of the recorded information piece and functions in reproduction; and an aggregate attribute information piece, recorded at a position read out prior to any other positions on said recording medium, and including at least a part of the individual attribute information piece for all of the recorded information pieces.
摘要:
An information record medium (1: DVD) has a record track recorded with video information (42, 44) and audio information (43) to be reproduced by a reproducing apparatus (S2). The reproducing apparatus is provided with a read device (80), performs a normal reproduction while relatively moving the read device along the record track and performs a special reproduction, such as a search, a scan and the like, by moving the read device across the record track on the basis of access information to access the video and audio informations. The video and audio informations and control information (41, 51: DSI) comprising the access information are recorded on the record track such that the video, audio and control informations are divided into a plurality of first data group (30: VOBU), each of which is a minimum unit able to be physically accessed, and are divided into a plurality of second data groups (20: CELL), each of which is a unit able to be logically divided in the normal and special reproductions and comprises a series of the first data groups arranged along the record track. Management information (11, PGCI) including a plurality of first reproduction prohibit informations (202), each of which indicates a prohibition of the special reproduction of respective one of the second data groups, is collectively recorded at one portion of the record track.
摘要:
An information recording medium includes: record information pieces logically independent of each other and constituting a hierarchical structure of hierarchical layers; layer information pieces for specifying one of the hierarchical layer; kind information pieces for indicating kinds of information relating to the record information pieces; a text group including layer related texts and record information related texts successively arranged in a mixed manner; text arrangement information pieces corresponding to the text group and arranged in pair with one of the layer information piece and the kind information piece corresponding to the text, the text arrangement information piece indicating a position of the text within the text group. The layer information pieces are arranged in an order in accordance with the hierarchical structure, and the kind information pieces are arranged in pair with the layer information pieces indicating the layer of the corresponding record information piece so as to specify the logical position of the corresponding record information piece within the hierarchical structure.
摘要:
A method of correcting triple-coded data, in which data coded in three different directions is subjected to error correction by referring to first, second and third codes, as well as a first flag determined by the first code and a second flag determined by the second code and other conditions, whereby this method demonstrates high error correcting performance with respect particularly to a burst error.
摘要:
A data converting apparatus inserts DC control bits in an input data series to generate a redundant data series. This apparatus determines the value of the DC control bits in such a way as to minimize the DC component of an output code series which is obtained by subjecting the redundant data series to code conversion. The apparatus performs code conversion after inserting the determined DC control bits.
摘要:
In a method for recording and reproducing a video format signal including audio data and a video data signal, the audio data is divided into groups of audio data, and identification codes for the groups of audio data are inserted into the video format signal as required. For reproducing the video format signal, a sound specifying instruction is compared with the identification codes to detect the group of audio data which has been specified so that the group of audio data thus detected is reproduced while the video data signal is reproduced, for instance, as a still picture.
摘要:
An image processing apparatus includes a shot splitting unit that splits a moving image into a plurality of shots each including a plurality of sequential frames; a shot detecting unit that detects, among the shots, a second shot similar to a first shot that is to be encoded; a first shot-generating unit that generates a third shot by correcting a time length of the second shot; a second shot-generating unit that generates a fourth shot by performing motion compensation using at least one of the first shot and the third shot; and an encoding unit that encodes a difference between the first shot and the fourth shot.
摘要:
An information record medium having a record track recorded with at least video information is to be reproduced by a reproducing apparatus, which has a read device and reproduces at least video information while relatively moving the read device along the record track. At least video information and control information comprising access information to access the video information are recorded on the record track and are each divided into a plurality of first data groups, each of which is a unit accessible by the reproducing apparatus and comprises the video and control informations. Management information including (i) reproduction procedure information and (ii) a plurality of first search prohibit informations, is collectively recorded at one portion of the record track for each of the second data groups.