# US 6,724,981 B1 · Apparatus and method for transferring digital versatile disc information > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 6,724,981 B1 - Document ID: US6724981B1 - Status: Granted - Kind: B1 - Application number: 09/518,226 - Filed: 2000-03-02 - Granted: 2004-04-20 - Earliest claimed: 1999-03-03 - Assignees: Samsung Electronics Co., Ltd. - Inventors: Jong wook Park; Ju-ha Park; Dong-il Song - Web page: https://patentgrep.com/patent/US6724981B1 ## CPC - H04N 21/4385: Multiplex stream processing, e.g. multiplex stream decrypting - H04N 5/775: between a recording apparatus and a television receiver - H04N 21/2389: Multiplex stream processing, e.g. multiplex stream encrypting - H04N 21/4135: {external recorder (interface circuits between an apparatus for recording television signals and a television receiver H04N5/775)} - H04N 21/43615: {Interfacing a Home Network, e.g. for connecting the client to a plurality of peripherals (home Audio Video Interoperability [HAVI] data switching networks H04L12/2805)} - H04N 21/440218: {by transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4 (conversion of standards in analogue television systems H04N7/01)} - H04N 5/85: on discs or drums - H04N 9/8042: {involving data reduction} - H04N 9/8063: {using time division multiplex of the PCM audio and PCM video signals} - H04N 9/8205: {involving the multiplexing of an additional signal and the colour video signal} - H04N 9/8227: {the additional signal being at least another television signal} - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract An apparatus and method for transferring digital versatile disc (DVD) information is provided. This apparatus includes a stream format converter for providing a first stream by converting the program stream format of audio and video information read from the DVD into a transport stream format. A re-encoder is included, for providing a second stream by overlaying video information read from the disc with subpicture information read from the DVD and re-encoding the overlaid information using a predetermined compression encoding scheme for image information. A stream selector is included, for selecting either the first or second stream according to the requirements of a user, the bandwidth of a transmission channel, and the information processing capability of an apparatus for receiving information, and transferring a selected stream to the apparatus for receiving information via a transmission channel. Accordingly, information obtained using a selected optimal transfer method, that is, MPEG-2 full re-encoding, MPEG-2 I picture re-encoding, DV format re-encoding, or conversion of information stored in an original DVD into an MPEG-2 TS packet, is transferred. Therefore, even if DVD information is transferred to any apparatus, it can be viewed. ## Claims ### Claim 1 An apparatus for transferring disc information to another apparatus, comprising: a stream format converter for providing a first stream by converting the program stream format of audio and video information read from the disc into a transport stream format; a re-encoder for providing a second stream by overlaying video information read from the disc with subpicture information read from the disc and re-encoding the overlaid information using a predetermined compression encoding scheme for image information; and a stream selector for selecting either the first or second stream according to the requirements of a user, the bandwidth of a transmission channel, and the information processing capability of an apparatus for receiving information, and transferring a selected stream to the apparatus for receiving information via a transmission channel. ### Claim 2 (depends on 1) The transferring apparatus of claim 1, wherein the predetermined compression encoding scheme for image information is moving picture experts group (MPEG)-2 full re-encoding, MPEG-2 intra picture re-encoding, or digital video format re-encoding. ### Claim 3 (depends on 1) The transferring apparatus of claim 1, wherein the transfer standard of the transmission channel is an IEEE 1394 interface or an 8 vestigial side band (8-VSB). ### Claim 4 (depends on 1) The transferring apparatus of claim 1, wherein the disc is a digital versatile disc (DVD). ### Claim 5 (depends on 4) The transferring apparatus of claim 4, wherein a stream to be selected by the stream selector, and the optimal compression encoding scheme for image information to be used by the re-encoder, are previously determined by a negotiation between a DVD apparatus for transferring the DVD information and an apparatus for receiving the DVD information. ### Claim 6 (depends on 1) The transferring apparatus of claim 1, wherein the stream selector selects the second stream only when a user wants a subpicture to be displayed, and selects the first stream in the other cases. ### Claim 7 (depends on 1) The transferring apparatus of claim 1, wherein the stream format converter supplies a first picture start signal and a picture discrimination signal to the stream selector by analyzing picture header information of video information read from the disc, the re-encoder supplies a second picture start signal to the stream selector by analyzing the picture header information of video information read from the disc, and the stream selector selects either the first or second stream in units of at least one frame information in synchronization with the first and second picture start signals according to a received stream switching control command. ### Claim 8 (depends on 7) The transferring apparatus of claim 7, wherein when the stream selector receives the stream switching control command for switching from the first stream to the second stream or from the second stream to the first stream, the stream selector provides a continuous, uninterrupted image by performing switching after a group of P, B and B pictures of the first stream in consideration of the order of frames. ### Claim 9 (depends on 7) The transferring apparatus of claim 7, wherein when the second stream is overlaid by a subpicture and the stream selector receives the stream switching control command for switching from the second stream to the first stream, the stream selector performs switching only when a new group of picture (GOP) starts, and when a new GOP of the first stream starts with bidirectionally predictive (B) pictures which are affected by the last picture within a previous GOP of the second stream, intra pictures of the second stream are further transferred, and then in a new GOP, the first stream is transferred with the exception of the B pictures which are affected by the last picture within the previous GOP. ### Claim 10 (depends on 1) The transferring apparatus of claim 1, wherein each of the stream format converter and the re-encoder has a picture buffer, such that the stream format converter and the re-encoder provide the first and second streams to the stream selector at nearly the same time when the stream selector switches from one stream to the other stream. ### Claim 11 (depends on 1) The transferring apparatus of claim 1, further comprising an on screen display (OSD) bitmap image generator for converting a subpicture image read from the disc into an OSD bitmap image and providing the OSD bitmap image information and screen control information for a subpicture to the transmission channel. ### Claim 12 (depends on 1) The transferring apparatus of claim 1, wherein the apparatus for receiving information is a digital television, and comprises: a demultiplexer for demultiplexing a stream received from the stream selector via the transmission channel, into a video stream and an audio stream; an audio decoder for decoding the audio stream and providing a decoded audio signal; a video decoder for decoding the video stream and providing a decoded video signal; an OSD image controller for controlling the OSD bitmap image information received via the transmission channel to be expressed on a corresponding area of a screen according to the screen control information at a predetermined time; and a graphic overlay for overlaying the decoded video signal with the OSD bitmap image information under the control of the OSD image controller. ### Claim 13 A method of transferring disc information to another apparatus, comprising: (a) providing a first stream by converting from a program stream format of audio and video information read from a disc into a transport stream format; (b) providing a second stream by overlaying video information read from the disc with subpicture information read from the disc and re-encoding the overlaid information using a predetermined compression encoding scheme for image information; and (c) selecting either the first or second stream according to the requirements of a user, the bandwidth of a transmission channel, and the information processing capability of an apparatus for receiving information, and transferring a selected stream to the apparatus for receiving information via a transmission channel. ### Claim 14 (depends on 13) The transferring method of claim 13, wherein the predetermined compression encoding scheme for image information is moving picture experts group (MPEG)-2 full re-encoding, MPEG-2 intra picture re-encoding, or digital video format re-encoding. ### Claim 15 (depends on 13) The transferring method of claim 13, wherein the transfer standard of the transmission channel is an IEEE 1394 interface or an 8 vestigial side band (8-VSB). ### Claim 16 (depends on 13) The transferring method of claim 13, wherein the disc is a digital versatile disc (DVD). ### Claim 17 (depends on 16) The transferring method of claim 16, wherein the stream selection and the predetermined compression encoding scheme for image information are previously determined by a negotiation between a DVD apparatus for transferring the DVD information and an apparatus for receiving the DVD information. ### Claim 18 (depends on 13) The transferring method of claim 13, wherein in the step (c), the stream selector selects the second stream only when a user wants a subpicture to be displayed, and selects the first stream in the other cases. ### Claim 19 (depends on 13) The transferring method of claim 13, wherein in the step (c), either the first or second stream is selected in units of at least one frame information according to a received stream switching control command. ### Claim 20 (depends on 19) The transferring method of claim 19, wherein in the step (c), when the stream switching control command for switching from the first stream to the second stream or from the second stream to the first stream is received, a continuous, uninterrupted image is provided by performing switching after a group of P, B and B pictures of the first stream in consideration of the order of pictures. ### Claim 21 (depends on 19) The transferring method of claim 19, wherein in the step (c), when the second stream is overlaid by a subpicture and the stream switching control command for switching from the second stream to the first stream is received, switching is performed only when a new group of picture (GOP) starts, and when a new GOP of the first stream starts with bidirectionally predictive (B) pictures which are affected by the last picture within a previous GOP of the second stream, intra pictures of the second stream are further transferred, and then in a new GOP, the first stream is transferred with the exception of the B pictures which are affected by the last picture within the previous GOP. ### Claim 22 (depends on 13) The transferring method of claim 13, further comprising (d) converting a subpicture image read from the disc into an OSD bitmap image, and transferring the OSD bitmap image to the transmission channel.