Transcoding media system

• US 7,505,889 B2
• Filed: 12/05/2002
• Issued: 03/17/2009
• Est. Priority Date: 02/25/2002
• Status: Expired due to Fees

• Current Assignee: CSR Technology Incorporated (Qualcomm, Inc.)
• Original Assignee: Zoran Corporation (Qualcomm, Inc.)
• Inventors: Cerchio, Gerard J., Salmonsen, Daniel R.
• Primary Examiner(s): Rodriguez; Paul L
• Assistant Examiner(s): GUILL, RUSSELL L
• Application Number:
  US10/313,743
• Publication Number:
  US 20040054689A1
• Time in Patent Office: 2,294 Days
• Field of Search: 703/24, 703/23, 709/231
• US Class Current: 703/23
• CPC Class Codes: H04L 12/283 Processing of data at an internetworking point of a home automation network
• CPC Class Codes: H04L 12/2836 Protocol conversion between an external network and a home network controlling appliance services of a home automation network from a device located outside the home and the home network H04L12/2818; protocol conversion H04L69/08; adaptation of digital video signals for transport over a specific home network H04N7/24
• CPC Class Codes: H04L 2012/2849 Audio/video appliances
• CPC Class Codes: H04L 67/56 Provisioning of proxy services store-and-forward switching systems in data switching networks H04L12/54
• CPC Class Codes: H04L 67/565 Conversion or adaptation of application format or content adding application control or application functional data H04L67/561
• CPC Class Codes: H04L 67/59 Providing operational support to end devices by off-loading in the network or by emulation, e.g. when they are unavailable
• CPC Class Codes: H04N 21/4135 external recorder interface circuits between an apparatus for recording television signals and a television receiver H04N5/775
• CPC Class Codes: H04N 21/4143 embedded in a Personal Computer [PC]
• CPC Class Codes: 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
• CPC Class Codes: H04N 21/4363 Adapting the video stream to a specific local network, e.g. a Bluetooth® network
• CPC Class Codes: 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
• CPC Class Codes: H04N 21/44227 Monitoring of local network, e.g. connection or bandwidth variations; Detecting new devices in the local network configuring of peripheral devices in general G06F9/4411; monitoring connectivity in data switched networks H04L43/0811
• CPC Class Codes: H04N 21/643 Communication protocols network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP], H04L65/65
• CPC Class Codes: H04N 5/765 Interface circuits between an apparatus for recording and another apparatus
• CPC Class Codes: H04N 5/775 between a recording apparatus and a television receiver
• CPC Class Codes: H04N 9/8042 involving data reduction

Abstract

A proxy subsystem for a media renderer comprises a network interface, a content transfer subsystem coupled to the network interface, a format transcoder coupled to the content transfer subsystem and capable of coupling to a rendering hardware. The proxy subsystem further comprises a connection manager service coupled to the content transfer subsystem and the format transcoder subsystem, and a rendering controller capable of coupling to the rendering hardware.

Claims

1. A computer system comprising:

a network controller;

an emulator interface controller coupled to the network controller;

an emulator processor coupled to the emulator interface controller and configured to emulate a storage device from information received from a network via the network controller;

a content bus interface coupled to the emulator interface controller; and

a format transcoder executable on the emulator processor that initiates content transfers by creating a navigation logfile containing frame identification and a related group of picture lists with file offsets.

2. The computer system according to claim 1 wherein the emulator interface controller is configured to couple to a computer bus and emulate bus data and control signals of the storage device.

3. The computer system according to claim 2 wherein the emulator interface controller executes on the emulator processor and is configured to execute multiple functions including control, data transfer, emulation, transcoding, data storage, interfacing, and test.

4. A computer system according to claim 2 further comprising:

a memory coupled to the emulator interface controller and storing data and program code executable on the emulator processor including program code for emulating bus data and control signals of a host, program code for emulating bus data and control signals of a device, and program code for selecting and seamlessly combining communication of actual bus data and control signals and emulated bus data and control signals on the computer bus.

5. A computer system according to claim 1 wherein the format transcoder executes one or more of a plurality of operations including:

initiating content transfers;

selectively activating modules that transfer, manipulate, and buffer audio and video streams; and

encoding frames.

6. A computer system according to claim 5, wherein:

the format transcoder can selectively pass through audio and video streams without activating the transfer, manipulate, and buffer modules.

7. A computer system according to claim 6 wherein:

the manipulate modules include modules that selectively manipulate video frames including;

removing an arbitrary frame region for processing;

de-interlacing a video frame;

enlarging or reducing video width or height;

filtering for image resizing;

removing an arbitrary frame region for encoding;

downsampling of video width and height;

video frame flipping or mirror imaging;

gamma correction;

anti-aliasing;

color manipulations; and

the manipulate modules include modules that selectively manipulate audio frames including;

volume changes;

audio stream resampling; and

synchronizing video and audio frames.